SOUTHWEST RESEARCH INSTITUTE P.O. Drawer 28510 6220 Culebra Road San Antonio, Texas 78228-0510 CHARACTERIZATION OF BIODIESEL EXHAUST EMISSIONS FOR EPA 211 (b) BY Christopher A. Sharp FINAL REPORT CUMMINS N14 ENGINE Prepared for National Biodiesel Board 1907 Williams Street Jefferson City, MO 6511 O-4898 January 1998 ent of Emissions Research Emissions Research Division Charles T. Hare, Director Department of Emissions Research Automotive Products and Emissions Research Division
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Characterization of Biodiesel Exhaust Emissions For EPA 211(b)
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SOUTHWEST RESEARCH INSTITUTE P.O. Drawer 28510 6220 Culebra Road
San Antonio, Texas 78228-0510
CHARACTERIZATION OF BIODIESEL EXHAUST EMISSIONS FOR EPA 211 (b)
BY
Christopher A. Sharp
FINAL REPORT CUMMINS N14 ENGINE
Prepared for
National Biodiesel Board 1907 Williams Street
Jefferson City, MO 6511 O-4898
January 1998
ent of Emissions Research
Emissions Research Division
Charles T. Hare, Director Department of Emissions Research Automotive Products and
Emissions Research Division
TABLE OF CONTENTS
Page
LISTOFFIGURES ........................................................ iii
LISTOFTABLES ......................................................... iv
I. INTRODUCTION .................................................... .
A. Test Engine.. .................................................. . B. Test Fuels ..................................................... . C. Test Procedures ................................................ .
A. Regulated Emissions and Particulate Composition .................... 8 B. C, to Cl2 Hydrocarbon Speciation .................................. 8 C. PAHandnPAH ............................................... 18
This report contains results from a test program conducted at Southwest Research Institute (SwRI) on behalf of the National Biodiesel Board (NBB). The objective of the program was to characterize regulated and unregulated exhaust emissions from a 1997 Cummins N14 engine while fueled on biodiesel and diesel fuel. It is understood that the data generated in this program will be submitted to EPA in order to comply with Tier I requirements under section 211(b) of the Clean Air Act.
REPORT CB-lC39A 1
II. DESCRIPTION OF PROGRAM
This section of the report describes the test engine, test fuels, and test procedures used during this program.
-4. Test Ermine
The test engine used to generate the data in this report was a 1997 model year Cummins N14 diesel truck engine. This engine was a direct-injected, four stroke, six cylinder diesel engine of in-line configuration. The engine was turbocharged and intercooled, and employed an electronically-controlled fuel injection system having unit injectors. Engine throttle control input was achieved via an electronic potentiometer which was connected to the test cell servo controller. The engine had a nominal rated maximum power on 2-D diesel fuel of 370 hp at 1800 rpm, and a nominal peak torque of 1450 lb-ft at 1200 rpm. No aftertreatment was employed by the engine. Transient test cell installation of the Cummins N14 engine for this program is shown in Figure 1.
FIGURE 1. TRANSIENT TEST CELL INSTALLATION OF THE CUMMINS N14 ENGINE
The new engine was received from Cummins and placed in a durability test cell for break-in. The engine was fueled initially on neat biodiesel, and checked for power and torque. Observed torque levels were roughly seven percent below nominal levels. This was expected due to the biodiesel fuel’s lower energy content compared to conventional diesel fuel, and the lower torque was consistent through all testing on neat biodiesel. Following this initial running, 125 hours of operation were run over a durability cycle supplied by Cummins, again using only neat biodiesel fuel. The details of this cycle are given in Appendix A. The engine was then relocated to a transient test cell for emissions testing.
REPORT OB-1039A 2
B. Test Fuels
Two test fuels were used during this program, which included a neat (100%) biodiesel fuel, and a neat (100%) diesel fuel. Selected properties for the biodiesel and the diesel fuel are given in Tables land 2. respectively.
The biodiesel fuel was supplied by Ag Environmental Products. This fuel is referred to in this report as “BlOO,” and was coded SwRI EM-2481-F. The fuel was delivered via tanker to SwRI and stored in an underground tank which was cleaned and rinsed with fuel from the same batch as the test fuel prior to the introduction of biodiesel. New test cell fuel systems were also constructed to prevent contamination of the fuel stream to the engine with diesel fuel.
The diesel fuel for this program came from a batch of diesel fuel that had been specially blended in order to meet the specifications required by the 211(b) regulations, as outlined in CFR 40 Part 79. This fuel is referred to in this report as “2D,” and was coded SwRI EM-2494- F. The fuel was delivered to SwRI in 55 gallon drums.
C. Test Procedures
1. Transient Testing and Regulated Emissions Measurement
Exhaust emission characterization was performed as specified under CFR Title 40 Part 79. For heavy-duty engines, the regulation specifies that emissions are to be measured over then heavy-duty transient Federal Test Procedure (FTP), as outlined in CFR Title 40 Part 86 Subpart N. The FTP outlines specific requirements for setting up the test engine and mappin g the engine’s full torque capabilities over its operating speed range. Engine-specific performance data are used, along with a normalized EPA transient cycle, to define a transient command cycle for test engine operation.
While the engine is operated over the 20-minute test cycle, torque and speed responses of the engine are compared to the command cycle to ensure FTP compliance. Simultaneously, engine exhaust gases are diluted with conditioned air, and emissions of interest are determined. Work generated by the engine is also recorded during the cycle. The FTP specifies both a cold-start test cycle (following an overnight soak) and a hot-start test cycle, with a 20-minute soak between the two test cycles. Measured emission masses for both cycles are weighted to produce a composite mass of one-seventh cold-start mass and six- sevenths hot-start mass. This composite mass is divided by a similarly weighted composite work to generate a brake-specific emission value in terms of mass of pollutant per unit of work generated.
3
TABLE 1. SELECTED TEST FUEL PROPERTIES FOR BIOO r
II Fuel I BIOO
SwRl Fuel Code EM-2481-F
Cetane Number, D-61 3 51.2
Flashpoint, D-93, F 367
Viscosity, D-445, cSt 4.08
Sulfur, D-2662, wt% 0.0000
Sulfated Ash. D-874 0.003
II Total Glycerine, wt% 0.17
IFree Glvcerine, wt% 0.01
TABLE 2. SELECTED TEST FUEL PROPERTIES FOR 2D
Fuel
SwRl Fuel Code
Cetane Number, D-61 3
Cetane Index
Distillation, D-4052, F IBP 10% 50% 90% EBP
API Gravity, D-4052
Sulfur, D-2662, wt%
Aromatics, FIA, wt%
Olefins, wt%
Saturates. wt%
2D
EM-2494-F
43.3
45.2
378 438 511 609 666
33.8
0.0476
39.1
1.7
59.2
REPORT OS-1039A 4
For the sampling of semivolatile polycyclic aromatic hydrocarbons (PAH), this procedure was modified because it was not possible to accumulate sufficient volume on the sampling media during a single test to meet EPA specified detection requirements. However, it was necessary to preserve the one-seventh/six sevenths weighting between cold-start and hot-start testing in order to compare this data with all other emission data. Therefore, semivolatile PAH samples were accumulated in a single set of media over one cold-start cycle and six successive hot-start cycles, with a 20-minute soak between cycles. The total mass measured was then divided by the total work produced during all seven test cycles to provide a composite brake-specific emission value.
Regulated emissions measured during this program included total hydrocarbons (HC), carbon monoxide (CO), oxides of nitrogen (NO,), and particulate matter (PM). Hydrocarbons were measured using continuous sampling techniques employing a heated flame ionization detector (HFID). CO and CO, were determined using proportional dilute gaseous samples analyzed with non-dispersive infrared (NDIR) instruments. NO, was measured continuously during the transient cycle via an NO, chemiluminescence instrument. Total PM levels were determined by collecting particulate matter on a set of 90mm Pallflex filters which were weighed both before and after the transient test. Regulated emissions were measured over the cold-start cycle and the first two hot-start cycles, but composite values were generated using only the cold-start and the first hot-start as specified by the FTP.
2. Particulate Characterization
Particulate samples from the cold-start and the first two hot-starts were analyzed to determine the general composition of the particulate emissions by several methods. Filter samples were analyzed for soluble organic fraction (SOF) via a Soxhlet extraction method using a 30-70 mixture of toluene and ethanol as the solvent. Sulfate levels were determined via an ion chromatograph. Both of these analyses were performed on sections of the 90mm Pallflex filters.
3. C, to C,, Hydrocarbon Speciation
Hydrocarbon emissions from C, to C12, including aldehydes, ketones, and alcohols, were measured during this program. These analyses were performed on samples from the cold-start and the first hot-start only. Samples were also generated during the second hot-start, but these were only examined if a problem was observed with samples from the first hot-start, which did not occur during testing of the Cummins N14 engine.
Gaseous hydrocarbons from C, to C12, except for aldehydes, ketones, and alcohols, were determined by analyzing proportional bag samples of dilute exhaust using a series of gas chromatographs, each optimized for a different carbon number range. The methods used for this analysis were the same as those developed for Phase II of the Auto Oil Program.’
‘Siegl, W.O.. Richer-t, J.F.O., J ensen, T.E., Schuetzle, D., Swarm, S.J., Loo, J.F., Prostak, A., Nag-y, D., and Schlenker, A.M., “Improved Emissions Speciation Methodology for Phase II of the Auto/Oil Air Quality Improvement Research Program - Hydrocarbons and Oxygenates,” SAE Paper 930142, Special Publication SP-1000.
REPORT 08.l039A 5
Aldehydes and ketones from C, to C, were sampled and analyzed using a 2,4- dinitrophenylhydrazine (DNPH) technique outlined in CFR 40 Part 86 Subpart N for methanol engines. Samples were obtained via impingers containing the DNPH solution, and these samples were analyzed via a high performance liquid chromatography (HPLC) instrument. This procedure was modified to add additional aldehyde compounds above C, to the target compound list.
Although alcohol emission measurements were not required for biodiesel by EP14, NBB elected to perform some measurement of alcohols. Samples were obtained using an impinger sampling method similar to that used for aldehydes, but using water instead of DNPH as the sampling solution. Samples were analyzed using a gas chromatograph. The target list of alcohols included methanol, ethanol, t-butanol, 2-propanol, and 1-propanol.
4. Polycyclic and Nitrated Polycyclic Aromatic Hydrocarbons (PAHhPAH)
PAH and nPAH emissions were sampled in both the particulate phase and semivolatile phase. Particulate samples were obtained using a second secondary dilution tunnel which was operated in parallel with the first tunnel used to obtain 90mm filter samples. This tunnel was considerably larger than the first one, to allow for the use of 20 x 20-inch Pallflex sampling media. This larger media size was necessary in order to obtain sufficient sample to meet EPA detection requirements for PAH and nPAH compounds. Filter samples were generated for the cold-start and the first two hot-start tests, although only samples from the cold-start and the first hot-start were analyzed.
Semivolatile PAH and nPAH samples presented a particular problem, in that conventional sampling techniques would not allow for sufficient sample to be gathered to meet EP,4 detection requirements. Commercially available sampling media and hardware were of insufficient size to allow for the volume flow rates needed. However, even with custom built sampling hardware, the maximum sampling media size was also limited by the ability to extract and concentrate samples obtained. Therefore, an approach was devised involving both custom built sampling hardware and a modified sampling plan. The modified plan, involving running multiple tests with a single set of sampling media, is described above.
The final sampling hardware setup for semivolatile PAH and nPAH emissions consisted of a pair of sample cartridges (rather than the usual single cartridge) which-were mounted in parallel on the larger secondary dilution tunnel, after the 20 x 20 inch filter media used for particulate phase sampling. These cartridges were sized to allow a media diameter of 4 inches, rather than the conventional 2.5 inches. This larger diameter allowed for a much higher flow rate to be used! while maintaining the face velocity within levels comparable to recommended levels for the smaller, conventional sampling media. The sample cartridges were loaded with a layered sampling media consisting of a 1.25 inch deep layer of polyurethane foam (PUF), a 0.5 inch deep layer of XAD-2 resin, and a second 1.25 inch deep layer of PUF. The XAD-2 resin was incorporated to improve the trapping efficiency for nPAH compounds, which were expected to be present in much lower levels than PAH compounds. After sampling, the two cartridges were extracted (with PUF and XAD-2 materials extracted separately) and the extracts were combined to form a single sample.
REPORT CL-1039A 6
The combination of two larger sample media sets and multiple test.runs allowed for the accumulation of a sample volume similar to that passing through a 20 x 20 inch filter during a single test (roughly 3000 standard cubic feet). This volume of sample was sufficient to allow for the analysis to meet the required detection threshold of 0.5 ng/hp-hr. A sample set for a given test day consisted of a cold-start filter sample, a hot-start filter sample, and a pair of PUF/XAD-2 cartridges for the semivolatile phase. A background PAH/nPAH sample set was obtained by operating the sampling systems with sampling media loaded, but without the engine operatin,, u for 2 hours in order to obtain sufficient volume.
Following testing, sample sets were delivered for analysis. In the case where immediate extraction was not possible, both PUFEAD-2 and filter samples were stored at 4°C. All samples were Soxhlet extracted for 16 to 18 hours. For the pair of semivolatile samples, the PUF and XAD-2 portions of both sample cartridges were separated and extracted.- The PUF portion of the sample was Soxhlet extracted with HexaneEther (94:6). The XAD-2 portion of the sample was extracted with 100% methylene chloride. Both portions were combined to form a single sample before cleanup. After extraction, the sample extracts were cleaned up by an acid wash and elution through a column packed with activated silica gel.
The samples were analyzed using several GC/MS instruments, as detailed below. For each analysis, a 1uL aliquot of the sample extract was injected into the instrument. For quantitation, an internal standard solution, made up of several deuterated PAH or nPAH compounds, was spiked into the extract at the time of analysis, and was used for calculating response factors.
Analysis of Nitro-PAH compounds was performed on a Finnigan 4500 HRGWLRMS using chemical ionization in the negative ion mode. Sample extracts were analyzed for regular PAHs on a Fisons MD800 HRGWLRMS in the selected ion monitoring t SIM) mode. All PUFKAD-2 samples required still higher resolution mass spectrometer analysis due to interferences which affected the accurate quantitation of detected analytes. In this case, a VG Autospec Ultima HRGWHRMS in the SIM mode was used for the analysis.
REPORT CW1039A 7
III. TEST RESULTS
This section of the report details the test results from the Cummins N14 engine. It is divided into several sections, concerning the results from each kind of exhaust emission characterization that was performed.
A. Regulated Emissions and Particulate Composition
Regulated emission levels for the Cummins N14 engine on the two test fuels are given in Table 3. Triplicate FTP tests were run on both the neat BlOO fuel and the neat 2D fuel. Although regulated emissions were measured on both the cold-start and the first two hot- starts of the test sequence for each given day, composite emission levels were generated-using only the cold-start and the first hot-start. Detailed results of individual transient tests are given in Appendix B. A new transient torque-map was run for each FTP test.
Comparing BlOO to 2D fuel, measured HC emissions were essentially eliminated by BlOO. CO emissions were reduced by 50 percent with neat BlOO, as compared to 2D, primarily as a result of the oxygen in BlOO. NO, emissions, however, were about 13 percent higher with neat BlOO as compared to 2D.
Particulate emissions with BlOO were 30 percent below the levels observed for 2D fuel. Particulate composition data for the N14 engine is given in Table 4. BlOO reduced insolubles in the particulates by more than 80 percent, likely as a result of the oxygen in the fuel. However, SOF increased by roughly 40 percent with BlOO. This increased SOF is mostly the BlOO fuel itself, which at particulate sampling temperatures is likely to condense onto a particulate filter. The increased SOF offset some of the reduction in insolubles, resulting in a net 30 percent reduction in total particulates. Sulfate emissions were essentially eliminated with BlOO.
B. C, to C,? Hvdrocarbon SDeciation
A summary of C, to C 12 speciation data, by individual species, including aldehydes and ketones, is given in Table 5. This table shows the composite brake-specific mass for each hydrocarbon compound, for all of the Cummins N14 tests, on all three fuels. Where “trace: appears on the table, it means that a given compound was detected, but was present at a level below the quantitation limit of the analysis, which was 0.02 mg/hp-hr. A zero on the table indicates that a compound either was not detected, or was found at a level below that of the background. Full details of speciation results for individual tests are given in Appendix C.
8
TABLE 3. REGULATED TRANSIENT EMISSIONS
2D Composite Average 1 0.23 1 0.75 ( 4.57 1 0.106 0.363 26.7 27.3 II
REPORT 0S1539P 9
TABLE 4. TRANSIENT PARTICULATE COMPOSITION
Test Total PM, Number g/hp-hr
SOF, g/hp-hr
Insolubles,
II
Sulfate, g/hp-hr mg/hp-hr
l-BlOO-Cl I 0.081 I 0.067 I 0.014 II 1.2
I-BlOO-Hl I 0.079 I 0.068 I 0.011 -7 0.5
l-BlOO-H2 I 0.078 I 0.078 I 0.000 II 0.4
Composite 0.079 0.068 0.011
l-BlOO-C2 0.074 0.067 0.007
l-BlOO-H3 0.070 0.060 0.010
I-BlOO-H4 0.072 0.061 0.011
Composite 0.071 0.061 0.010
I-BlOO-C3 I 0.082 I 0.073 I 0.008 II 0.3
l-BlOO-H5 0.077 0.070 0.007
1-BlOO-H6 0.079 0.070 0.010
Composite 0.077 0.070 0.007
1-2D-Cl 0.119 0.057 0.061 _
l-2D-HI 0.104 0.048 0.056
1-2D-H2 0.101 0.050 0.051
Composite 0.106 0.050 0.057
I-2D-C2 0.116 0.051 0.065
l-ZD-H3 0.107 0.045 0.062
I-2D-H4 0.105 0.042 0.064
Composite 0.108 0.046 0.062
I-2D-C3 0.113 0.057 0.056
1-2D-H5 0.104 0.051 0.053
l-2D-H6 0.104 0.051 0.053
Composite 0.105 0.052 0.053 3.2
REPORT OR-1039A 10
TABLE 5. SUMMARY OF COMPOSITE C, TO C,, SPECIATION r
COMPOUND
REPORT 08.1039A
TABLE 5 (CONT’D). SUMMARY OF COMPOSITE C, TO C,, SPECIAXON
COMPOUND
REPORT 08.1039A
TABLE 5 (CONT’D). SUMMARY OF COMPOSITE C, TO C,, SPECIATI=)N
a 2,2-Dlmethylpentane and methylcyclopentane co-elute. GC peak area split equally between the two compounds, b 3-Methyl-3-ethyl-pentane co-elutes with reported compound. Not reported separately. c Cis-1.4-Dimethylcyclohexane co-elutes wtth reported compound. Not reported separately. d Propylcyclopentane co-eTutes with reported compound. Not reported separately. e 2,5-Dimethylheptane and 3.5-dimethylheptane co-elute. GC peak area split equally between the two compounds. f Decane and tsobutylbenzene co-elute. GC peak area split equally between the two compounds. g n-Butylbenzene co-elutes with reported compound. Not reported separately. h lsobutvraldehvde and methvl ethvl ketone co-elute. LC peak area split equally between the two comoounds.
1 .67
0.35
0.23
77
REPORT 08.1039A 17
,4 summary of total speciated hydrocarbons, and their associated ozo:le formation potential,’ is shown in Figure 2. For neat BlOO, the total speciated hydrocarbon mass is nearly 50 percent less than that measured for 2D fuel, and the associated ozone potential is reduced by the same amount. Significant reductions in most of the aldehyde compounds were observed with BlOO. with formaldehyde and acetaldehyde 30 percent lower than the levels observed for 2D fuel. A summary of alcohol data is given in Table 6. None of the target alcohols were found at a quantifiable level in any of the samples. from the Cummins N14 engine, and the few traces detected were at levels below those found in the background samples. This was expected, as no alcohol was present in any of the test fuels.
C. PAH and nPAH
A summary of the results of PAH and nPAH analyses for all three fuels is given in Table 7. This table shows the total composite emission rate of each PAWnPAH compound, including both particulate and semivolatile phases. Complete PAH/nPAH data for individual samples is given in Appendix D. Where an “nd” appears, it means the compound was not detected in any of the exhaust samples for that test fuel and day. The only “rids” that occurred were for selected nPAH compounds on certain biodiesel test runs. The detection limits for these compounds were actually below 0.1 ng/hp-hr for filter samples, and below 0.05 ng/hp-hr for the PUF/‘XAD-2 samples. Where “trace” appears in the table, it means that the compound was detected, but was measured at a level below the required quantitation limit of 0.5 ng/hp- hr, as defined by EPA in CFR Title 40 Part 79. Where a zero appears in Appendix D for a given compound and exhaust sample, it means that this compound was detected and quantified! but at a level lower than in the background samples, resulting in a calculated mass less than zero in these cases. Any calculated masses less than zero were set to zero following what is standard practice for regulated emissions calculations. This only occurred for certain compounds on selected semivolatile samples.
The neat BlOO samples presented a unexpected problem for the analysis, in that the biodiesel fuel itself caused considerable interference during the PAH analysis. The nPAH measurement was not affected by this because those compounds are measured with the GC/MS in a negative ion mode, rather than the positive ion mode used for PA.Hs. Several cleaning processes were attempted in an effort to remove the interfering biodiesel compounds, but this was only partially successful. A number of biodiesel samples had to be diluted as much as 50-fold: although all PAHs were still detected, so detection thresholds did not become an issue. The PUFXAD-2 samples were cleaned, diluted, and then analyzed using a higher resolution instrument in order to achieve required detection capabilities. Again, all of the PAH compounds were detected in these samples, so detection thresholds were not an issue.
The neat BlOO fuel resulted in large decreases in all of the target PAH and nPAH compounds. as compared to 2D fuel. All of the PAH compounds were reduced by 75 to 85 percent, with the exception of benzo(a)anthracene, which was reduced by roughly 50 percent. The target nPAH compounds were also reduced dramatically with neat BlOO fuel, with 2- nitrofluorene and l-nitropyrene reduced by 90 percent, and the rest of the nPAH compounds
‘Calculated based on reactivity factors given in “California Non-Methane Organic Gas Test Procedures Appendix 1 - List of Target Compounds.”
REPORT 08.1039A 18
0 0.2 LL G E T 0.1 Y
ii 0
BlOO 2D FUEL
El OZONE POTENTIAL
FIGURE 2. COMPOSITE TOTAL MASS AND OZONE POTENTIAL FROM C, TO C,, SPECIATION ANALYSIS
reduced to only trace levels. All of these reductions are likely due contained no aromatic compounds of any kind, including PAHs.
to the fact the,Siodiesel fuel
TABLE 6. SUMMARY OF COMPOSITE ALCOHOL DATA
BlOO 2D Compound
Day 1 Day 2 Day 3 Day 1 Day 2 Day 3
methanol 0.0 nd 0.0 0.0 0.0 nd
ethanol nd nd nd nd nd nd
t-butanol 0.0 nd nd nd nd nd -
Z-propanol nd nd nd nd nd nd
1 -propanol 0.0 nd nd nd nd nd
nd - not detected
TABLE 7. SUMMARY OF PAHhPAH DATA
REPORT 08~1039A 20
TV. CONCLUSIONS
In considering all of the data from the Cummins N14, several trends become apparent in comparing the two test fuels. For regulated emissions, the neat biodiesel fuel (BlOO) reduced emissions of HC, CO: and particulates by 95, 45, and 30 percent, respectively, as compared to 2D fuel. NO, emissions, however, increased 13 percent with BlOO fuel. The reduction in particulate emissions with neat biodiesel was generally due to a reduction in carbon soot: although this was partially offset by an increase in SOF.
When the unregulated emissions data is examined, the results generally indicate substantial improvements with neat biodiesel. The mass of speciated hydrocarbons from C, to C,, is reduced significantly with neat biodiesel, compared to diesel fuel, as is the ozone formation potential of the hydrocarbon emissions. Substantial reductions in aldehydes such as formaldehyde and acetaldehyde were observed with neat biodiesel. PAH and nPAH data also indicated reductions on the order of 90 percent with neat biodiesel for nearly all of the PAHs and nPAHs that were measured.
REPORT 08.1039A 21
APPENDIXA
CUMMINS N14 DURABILITY CYCLE
REPORT 08-T 039A
CUMMINS N14 DURABILITY CYCLE
Step Condition
1 Idle
2 Peak Torque
Speed, rpm
650
1200
Throttle
Closed
WOT
Time, set
144
36
3 Rated Power 1800 WOT 360
4 High idle 2000 WOT 36
5 Rated Power 1800 WOT 144 -
6 Ramp to Peak Torque Ramp to 1200 WOT 36
7 Peak Torque 1200 WOT 108
a High idle 3000 WOT 36
REPORT CB-1C39A A-l
APPENDIX B
INDMDUAL TRANSIENT TEST DATA
AEPORT 08.1039A
Southwest Research Institute - Department of Emissions Research EPA Cold Transient Emission Test Results
Project No. 08-l 039-000
Engine Model: 97 CUMMINS N-14 Engine Desc.: 14.0 L (855 CID) l-6 Engine Cycle: Diesel Engine S/N: 11844196 SME
Test No.: 1 -SME-Cl DIESEL SME, EM-2481-F Date: 11/07/l 997 Time: 0943 HCR: 1.833 FID Resp: 1.00 Program HDT: 4.01 -R H= 0.120 C= 0.780 0= 0.100 X= 0.000 Cell: 4 Bag Cart: 1 Engine Oil: CUMMINS BLUE
Ambient/Test Cell Conditions Barometer: 29.55 in Hg 100.1 kPa Engine Inlet Air
A 2.2.Ditrlelhylpenlane and llrettlylcyclopelllane co-elule GC peak area split equally belween the Iwo compounds
B 3-Methyl~3~elhy.perllane co-elutes with reported compound. Not reported separately. C Cis-1,4-Dirnethylcyclohexane co-elutes wlh reported compound. Not reporied separately D - Propylcyclopenlane co-elutes wllh reported compound. Nol reporled separately E - 2,5-Dimethylheprane and 3,5-dilnelhyllleplane co-elule GC peak area spill equally between Ihe two compounds.
F Decane and isobutylbenzene co clule GC peak area split equally belween the two compounds. G r,-Butylbenzene co-elutes wlh reporled compound Nol reported separalely ti Isobutyraldehyde and methyl etllyl ketone co elule LC peak area split equally between lhe two colnpounds
-0 a 1 1351 -0. I , 1.701 -091 2.81 1 -1.51 2.171 -1.21 2031 -‘.‘I
1 SUMMED SPEClAl ED VALUES I 461 261 1 441 2431 511 268 1 84 1 4361 a1 I 4221 78 I 399
A 2.2.Dlmelhylpenlane and melhylcyclopenlane co-elule GC peak area splrt equally b&veer? the Iwo conrpounds I3 - 3-Methyl-3.elhy-perltane co-elules wilh reported compound. Nol reporled separately. C Cis-1.4.Dimelhylcyclohexane co-elutes wilh reporled compound Not reported separately D Propylcyclopenlane co-elules wrlh reported compound Not reporled separalely E 2.5Dimellrylheplane and 3.5.drmelhylheplane co.ekrle GC peak area splrl equally between the Iwo compounds. F Decane and isobulylbenzene co-elule GC peak area sphl equally belween Ihe two compounds. G n-Butylbenzene co-elules wilh reporled compound Nol repoded separalely H lsobutyraldehyde and methyl ethyl kelone co-elule LC peak area split equally between lhc Iwo compour~ds
SUMMED SPECIATED VALUES ael 2191 401 222 I 371 2131 71 I 375 1 621 424 1 771 396
A 2.2~Dimelhytpenlane and melhylcyclopenlane co-elule GC peak area spttl equally between ttte Iwo contpounds 0 3 Melhyl-3~ettly.perllarle co-elules with reported compound. Not reported separately. C - Cts-1,4-Dimelhytcyctohexane co-elules wrth reported compound. Not reported separalely D Propylcyctopenlane co-elules wrlh reported compound NOI reported separately E - 2.5Dtmelhytheptane and 3.5dtmelhylheptane co-elule GC peak area splrt equally between the two cotrtpounds. F Decane and isobulytbenzene co-elule GC peak area spttt equally belween Ihe two compounds. G n-Butylhenzene co-elutes with reported compound. Not reported separately. H lsobutyraldehyde arrd melhyt ethyl ketone co-etute LC peak area splat equally belweerr the two compourtds
SUMMED SPECIATED VALUES I 1lOlj 46) 1001 61 2611 9131 38 I 1001 61 2191 39 ) 225
A - 2,2-Dimethylpentane and melhylcyclopenlane co-elude. GC peak area splrt equally belween the two compounds. I3 - 3-Melhyl-3-elhy-penlane co-elutes w~lh reported compound. Not reported separately. I C - CIS-1 ,4-Dirnelhylcyclohexane co-elules with reported compound. Not reported separately. D - Propylcyclopenlane co-elules with reported compound. Nol reported separalely. E - 2.5.Dirnelllylheplane and 3,5-dimethylheptane co-elute. GC peak area split equally between the two compour~ds F - Decane and isobulylbenrene co-elute. GC peak area split equally belween Ihe two compounds. G - n-Bulylbenzene co-elules wilh reporled compourld. Not reported separalely.
A - 2,2-Din~elhylpentane and methylcyclopenlane co-elule GC peak area splil equally between the Iwo compounds B 3-Methyl-3-elhy-perllarle co-elules wrlh reported compound Not reporled separately! C - CIS-1 ,4-Dimelltylcyclohexane co-elules wilh reported compound. Nol repurled separately D - Propylcyclopentane co-elules wilh reported compound. Not reported separately E 2.5.Dllnelhylheptane and 3.5.dimelhylheplane co-elule GC peak area split equally belweerr Ihe Iwo compounds F Decane and isobulylberlrerre co-elule GC peak area splil equally bclween the Iwo compounds. G n-Bulylbenzene co-elules with reporlecl compound Not reported separately. H - lsobutyraldehyde arid rnelhyl ethyl kelorre co-elule. LC peak area splil equally belween lhc two corrtpourrds.
2.2.UIM~IIIILOCTANE I 01 ooul 0.00) OO( . _ -... -r. ..,* ---..,r nl ” r-in I 0 no I 0 000 I 001 01 0 on t 0 00 I 0 000 I 001 0 00 1001 2.4 “,Mt,“lL”LIHNC I ., “--I n-PROPYLBENZENE
I 0 0 00 0 00 0 000 00 n 0 00 0 00 u 000 0 01 0 00 1 00
,,LICrU”I 1 CTUYI IIChl7ENE 0
0 00 0.00 0 000 00 0 u 00 0 00 0.000 0 01 0.00 ) 00 .,“,C I r, 1 L-J-L I I I I LYLIILLI .L
A - 2.2.Dimelhylpentane and methylcyclopentane co-elute GC peak area split equally betweerr tl?e two compounds. B - 3Methyl-3-ethy-perltane co-elutes with reported compound. Not reported separately. 1 C - CIS-1 .4-Dimelhylcyclohexane co-elules wrlh reported compound. Not reported separately. D - Propylcyclopentane co-elutes with reported compound. Not reported separalely. E - 2.5.Dimethylheptane and 3$dimethylheptane co.elute. GC peak area split equally between the two compounds F Decane and isobutylbenzene co-elute. GC peak area split equally between the two compounds. G - n-Bulylbenzene co-elutes with reported compound. Not reported separalely. H lsobutyraldehyde arld methyl ethyl ketorre co-elute. LC peak area split equally between the two compounds.
TEST NUMBER: l-2D-1 ENGINE: 1997 CUMMINS N-14 TEST DATE: 1 l/24/97 TEST FUEL: EM-2494-F
A- 2.2.Dirrletl~ylpe~~la~~e and rnethylcyclopentane co-elule GC peak area split equally betweerl the two compounds El- 3-Metlryl-3-etlly-perrtarle co-elules with reported compound. Not reported separately! C- Cis-1.4.Dimethylcyclohexane co-elutes with reported compound. Not reported separately D- Propylcyclopentane co-elules with reported compound. Not reported separately. E- 2.5Dimelhylheptane and 3.5.dimethylheptane co-elute GC peak area split equally between the Iwo cornpounds F- Decane and isobulylbenzerre co-elute. GC peak area split equally belween Ihe two compounds. G- n-Bulylbenzerre co-elules with reported compound. Not reported separalely. H- lsobutyraldellyde and rnethyl ethyl ketone co-elule. LC peak area splil equally between tlre Iwo compou~~ds.
BAGCARl VAlllES nc 5551 211 5401 202 203 co 24481 930 18118 676 712 co2 14843000 563730 14221000 530634 535362
F NOX 128972 4898 120513 4497 4554
E
00 co.0 0‘0 000 0 1 PO0 ItXO II 100 loo00 lo00 lo00 lo 3NWX3t-l cz IS‘0 22 LZO 0 119.0 loso Ict 1 S’Z 1 IfDO 1690 (9so Sl 3N3X3W1 E’Z LS’O Z’Z i 7N=l I Nqrl- I -1AH I qlfd-7.
E.0 0’0
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00
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00’0 nn-n
E.0 0‘0
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120’0 POO‘O ofhm .__ _ I.-- 7no’ll m-mm
I
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El S n I-
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69’0 9s 0 11’0 600
nn’n --I m.0 -- Iwn I bn’ --- , .- 0 I nun I nn.0
n
.-- _ _-_ ___ I 10
-- _-- - I I 100’0 loo.0 loo.0 IO.0 looo.0 loo.0 I& mm lnnn I 83811 In Inn I nnnm Imn Inn
-. .--,. -- .--. . - 3NVlN3dlAH13W-E
3N3LN3d-Z-SNVtll-lAHl3W-b
3NVlN3dlAH13W-Z 3N31N3d-Z-Sl3-lAH13W-P
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UN3d-I-lAH13W-b lszo
1120 (Cl
16’1
19100
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3N3laVJ nEl-E’I-lAH13W-Z
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3N3 LflB- L-lAH13W-Z _ I-- I -
n-n I no 0 lo.0 loooo loo0 loo0 lo loo I000~0 loo0 loo0 lo I 3N3lP __ I-- - I - 1
n’n I nn’n In0 loooo loo-o loo0 lo IO’0 loooo loo.0 loo0 lo I _I
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_. . I- I~~ loo 0 loo 1 000’0 loo0 1000 lo loo 1 000’0 loo0 100’0 lo (3NVlN3dOSI) 3NVlnEllAH13W-Z I on 0 IO’0 loooo loo-o 1000 lo loo I000’0 loo.0 loo0 IO I lONVHl3 __
I-EC I 19bl IWI~O lb9 I 1 PE I I SC ICb1 lLLloc9t iL6I I SC I I
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Inn “ ” Innnn “ I_ _ 1nn.n lnnn _ _ ” . _ In I - 3NWlrlEl
00 00 0 0’0 OL”” nn’n lnnn lnnn ““” ““” In I n-n “I I nnn’n .1”1 - lnnn lnnn _-” “_” In 3N3KlVdOtld 01 S6 L 01 1100 PC 2 I6 I IS I I El00 69 2 LI z 8s 3N3lAl30V 9.m LS c s EE 01 P’O 9E b 9s E 96 I ‘PC kb0 OS b F9 c 96 3N3lAdOUd 0’0 00 0 00 000 0 00’0 00 0 0 00 000 0 000 00 0 0 3NVdOtld
C 6L WOI b QL 096.0 LlCl 9L.O I 682 L b8 ISO’I lPbl 19’ I I 6OC 3N31Ati13 0’0 11 0 0‘0 000 0 910 El 0 b 0.0 000.0 00 0 000 0 3NVH13
1
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r-----i
loo I I loo’0 lo lo.0 I I loo‘0 lo I tltl dHM/%‘l III I dtIB/E)W 1 tit-I-dH913W 1 UOL3VJ 1 % EIOWN 111 I JI iam4 E)W 1 UH-dliB/Z)W 1 UO13Vd 1 % 9OWN tll I-dtlRiE)W 3w I aNnOdw03
A - 2,2-Dimethylpenlane and melhyJcyclopenlane co-elute. GC peak area split equally between llre two cornpounds. B - 3Methyl-3ethy-pentane co-elutes with reported compound. Not reported separately. C . Cis-1,4-Dirnethylcyclotrexarre co-elutes with reported compound. Not reported separately. D - Propylcyclopentane co-elutes with reported compound. Not reported separately. E - 2.5Dimethylheptane and 3,5-dimethylheptane co-elute. GC peak area split equally between Ihe two compounds. F - Decane and isobutylbenzerre co-elute. GC peak area split equally between Ihe two compounds. G . n-Butytbenzene co-etutes with reported compound. Not reported separately. H - lsobutyraldehyde and methyl ethyl ketone co-elule. LC peak area split equally between the two compounds.
BAG CART VALUES
HC
co co2
NOX
5518 208 7296 272 262
24522 922 19120 712 742
15139000 569349 14946000 556234 558107
1 129129 4856 120359 4479 4533
1.4.DIMETHYLHEXANE, NO I E B I 01 0001 0001 oc I-METHYLHEPTANE 01 0001 0001 OS
GMElHYLHEPTANE I IYLCYCLOPENTANE 1
nnnnl 0 003 02 0.18 02 0.000 00 0 00 00
IV” VU Y, U.““, VU”, 0 000 0.0 0 00 0.0 100 00 nl ,. .._ ,. ,.- n nnr\ nr\ n nn l-l-
A - 2,2-Dirnelhylpenlarle arid melhylcyclopenlane co-elude GC peak area split equally between Ithe Iwo compounds B - 3-Melllyl-3-ellly-perllarle co-elules with reporled compound. Not reported separalely.1 C Cis-1,4-Dimelhylcyclotlexane co-elules wilh reported compound No1 reported separately D - Propylcyclopenlane co-elutes wilh reported compound Not reported separately E - 2 5-Dimelllylheplane arld 3.5~dimelhyllleplane co-elude GC peak area split equally belween llle Iwo compounds F Decane and isobulylbenzene co-elute GC peak area splil equally belween the Iwo compounds. G - n-Bulylbenzene co-elutes with reporled cornpourld Not reported separately. H - lsobtrtyraldehyde arld methyl ethyl kelone co-elute. LC peak area spill equally between Ihe Iwo conlpounds
BAG CART VALUES HC 6038 228 6207 233 232 CO 23810 901 20313 761 781 co2 14992000 567234 14814000 555247 556960 NOX 129201 4888 121814 4566 4612
APPENDIXD
PAH AND nPAH DATA
APPENDIX TABLE D-l. PAH AND nPAH DATA
8100-l
Mass, ng Corrected Brake-Specific Mass, nglhp-hr
Filter PUF Filler Fractions
Compound Cold Hot Bkgrd Sample Bkgrd Cold Hot PUF Composite Filter PUF