Biomass Gasification & Biofuels 2 nd Generation at the University of Seville Presentation of activities Pedro Ollero de Castro/Alberto Gómez Barea Bioenergy Group University of Seville (BEGUS) 03 th March 2011 Seville, Spain BEGUS presentation, 3th March, 2011
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Biomass Gasification & Biofuels 2nd Generationat the University of SevillePresentation of activities
Pedro Ollero de Castro/Alberto Gómez BareaBioenergy Group University of Seville (BEGUS)oe e gy G oup U e s y o Se e ( GUS)
03th March 2011 Seville, Spain
BEGUS presentation, 3th March, 2011
Chemical and Environmental Engineering Department (DIQA): Lines of research(DIQA): Lines of research
GasificationWaste Management Eng.
(2000)
BIONERGY(BEGUS)
Chemical2ndG Biofuels
(2003)
(BEGUS)
DIQAChemical Process
Engineering
(2003)
CCSEngineering
W t d E i t l
– Desulphurization
– Gas filtering
Clean Coal Technologies
Water and Environmental Chemistry
Gas filtering
BEGUS presentation, 3th March, 2011
Bioenergy Group of the University of Seville (BEGUS)Seville (BEGUS)
• Foundation of BEGUS in 2000• Foundation of BEGUS in 2000 • Current staff
5 professors 6 PhD students 10 Msc students– 5 professors, 6 PhD students, 10 Msc students
• Initially focused on biomass gasification in FBConstruction of an 150 kWt bubble fluidized bed gasifierConstruction of an 150 kWt bubble fluidized bed gasifier10-years experience with a variety of fuels
RENEW Project with ABENGOA BIOENERGYRENEW Project with ABENGOA BIOENERGY
Main objective: to develop a thermochemical route to ethanol based on biomass gasification and catalytic synthesis.
Consolidation of two new lines of work:Consolidation of two new lines of work:
Evaluation and optimization of catalysts for ethanol synthesis
Conceptual design, simulation and techno-economical assessment of BTL and BTG processes (thermochemical route)
BEGUS presentation, 3th March, 2011
BIOMASS TO LIQUID FUELS
CATALYSTS FOR ETHANOL SYNTHESIS
MAIN GOAL: To develop new catalysts with higher productivity
Collaboration with other groups specialized in catalysisCollaboration with other groups specialized in catalysis
Evaluation in our lab of improved Rh and MoS2 based catalysts
Testing at different conditions (P, T and syngas composition) of proprietary catalysts at micro (1g) and bench scale (30-100g) for p op eta y cata ysts at c o ( g) a d be c sca e (30 00g) ooptimum operation
Development of kinetic models for use in ASPEN plus simulationsDevelopment of kinetic models for use in ASPEN plus simulations
ACHIEVEMENT: slight productivity improvement (10%) but insufficient to
BEGUS presentation, 3th March, 2011
make the BTL process profitable
BIOMASS TO LIQUID FUELS
HYDROCARBONYLATION OF DME
Process simulations based on published kinetic data show higher ethanol production
BEGUS presentation, 3th March, 2011
p g p
BIOMASS TO LIQUID FUELS
SYNTHESIS, ANALYSIS AND TECHNO-ECONOMICAL EVALUATION OF THERMOCHEMICAL BTL(G)EVALUATION OF THERMOCHEMICAL BTL(G)
PROCESSESThe following procedure is followed when assessing a thermochemical routeThe following procedure is followed when assessing a thermochemical route
Laboratory feedback (catalyst performance)
Vendor quotes
Conceptual Process Economic
(catalyst performance) quotes
design simulation evaluation
Literature
Let’s see an example
BEGUS presentation, 3th March, 2011
Let s see an example
BIOMASS TO LIQUID FUELS
(Rh) (S Mo)
1) Conceptual design
Biomass
Dust
H2O
Fast Pyrolysis Gasification Quench Candle Filter Sour WGS
(Rh)
Scrubber
H2O
NH3
Selexol
(S2Mo)
ZnO bed
H S
O2
H SAsh
Alkalis3
NH4ClH2S H2S
H2O O2 MeOH H2OLights
ZnO bedATR
(Rh)
H2SStabilizer
Combined Cycle
EtOHPrOHDehydration Distillation
Columns ButOH
(S2Mo) H2OLights MeOH
ReactorSelexol Flash G-L
(Rh)
Stabilizer
EtOHPrOHDehydration Distillation
Columns ButOH(Rh)
CO2 H2S H2O
Example: General flowsheet of process for ethanol production via thermochemical conversion of biomass by entrained flow gasification (S2Mo or Rh based synthesis
BEGUS presentation, 3th March, 2011
catalyst)
BIOMASS TO LIQUIDS
2) Process simulation 3) Economic evaluation
M&E balance results
Aspen Plus flowsheet Integrated economic Excel spreadsheet
Internal Rate of Return (IRR)Net Present Value (NPV)
Excel spreadsheet
BEGUS presentation, 3th March, 2011
Net Present Value (NPV)Minimum Selling Price (MESP)
BIOMASS TO LIQUID FUELS
ASSESSED BTL AND BTG PROCESSES
Ethanol Processes :
-Direct synthesis (Rh and MoS2 catalyst)
-Direct syntheis via syngas fermentation
-Indirect synthesis (hydrocarbonylation of DME)y ( y y )
-Other BTL and BTG processes:
- Synthetic Natural Gas (SNG) - Bio-olefines (MTO)Synthetic Natural Gas (SNG) Bio olefines (MTO)
- Methanol - Bio-gasoline (MTG)
DME Diesel F T
BEGUS presentation, 3th March, 2011
- DME - Diesel F-T
Gasification of biomass and wastes
– 12-years experience– Focused on:
• Understanding the processf– Lab studies to measure fuel conversion behavior
– Pilot scale studies– Modeling of the process: mechanisms particle conversion andModeling of the process: mechanisms, particle conversion and
reactor simulation (own codes for simulation, CFD, Aspen)
• Scaling and demonstration– Atmospheric Fluidized Bed Gasification
• Conventional design: reactor + (hard) gas cleaning• Innovative design: Optimized reactor + soft gas cleaning• Innovative design: Optimized reactor + soft gas cleaning
– Balance of the activity: 2 M €, 2 lab FB (kW), 3 pilot plants (dozens of kW), 3 demonstration (MW) plants, more than 50
• Flexible design in three stages with the advantages of fl idi ed and fi ed bed designsfluidized and fixed bed designs:– Improvement of char conversion
Tar conversion inside the gasifier– Tar conversion inside the gasifier
• Focused on:ll/ di l di t ib t d d ti– small/medium scale: distributed power production
– Flexible enough to process contaminated wastes
BEGUS presentation, 3th March, 2011
Basis of the new concept: Flexible Three Stage Gasifier (FLETGAS)Flexible Three-Stage Gasifier (FLETGAS)
Biomass
2 N t l ti2 N t l ti
1 BFB gasifier1 BFB gasifier
2. Non catalytic 2. Non catalytic reformerreformer
1. BFB gasifier1. BFB gasifier
3. Chemical 3. Chemical quenchquench
BEGUS presentation, 3th March, 2011
Challenges of Fletgas
Fluid dynamics:– Fluid-dynamics: • optimization of movement of solids and gas
– Adjustment of process conditions t h h d t i• to enhance char and tar conversion: Understanding the process:
Yields of tars gas and char under various conditions– Yields of tars, gas and char under various conditions– Conversion of tars: generation + reforming– Role of steam (high temperature)( g p )– Role of char as catalyst for secondary conversion of tar
BEGUS presentation, 3th March, 2011
Fuel conversion investigation:Type of fuel conversion testsType of fuel conversion tests
• Under various conditions, tracking:M t
wDSS
M t
wDSS
– yields of char, tar and gas during devolatilization:
– primary and secondary conversion of tars– Char conversion with CO2/steam at different
conditionsTbedTbed
– Char as catalyst for different tars
N2-CO2, N2-H2O N2-CO2, N2-H2O
BEGUS presentation, 3th March, 2011
2 2, 2 22 2, 2 2
Fluid-dynamics: Cold model
6 7
V
2
3
35
81 R
48
BEGUS presentation, 3th March, 2011
Modeling works for Fletgas development
– Fluid-dynamics model– Particle conversion model: devolatilization and char
conversionG h d l f f i Ki ti f t– Gas-phase model for reforming: Kinetics of tar conversionReactor models:– Reactor models:• Simple reactor model of the process with the kinetics
from literature design of pilot plant (under g p p (construction)
• Advanced reactor model with our own kinetics (only DSS is available up to know) optimization
– CFD simulation for design of detailed equipment:
BEGUS presentation, 3th March, 2011
• Homogeneous reformer: design of air/steam injection
Contact /further information
Equipments, project and capalilities of BEGUS in our web:http://www.grupobioenergia.comhttp://www.grupobioenergia.com
Much more information on FBG models in:Gómez-Barea A.. Leckner B. Modeling of biomass gasification in