Progressing Optical Gas Standard concepts - from environmental measurements to industrial process control and AMC monitoring Zhechao Qu , Javis Nwaboh, Thomas Benoy, Olav Werhahn, Volker Ebert 2020-11-05 MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Progressing Optical Gas Standard concepts
- from environmental measurements to industrial process control and AMC monitoring
Zhechao Qu, Javis Nwaboh, Thomas Benoy,
Olav Werhahn, Volker Ebert
2020-11-05 MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection
2020-11-05 2 MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection
▪ National Metrology Institute of Germany, under the
authority of the Federal Ministry for Economic Affairs
and Energy (BMWi)
▪ approx. 1900 staff members,
700 scientific papers per year,
185 Mio. € annual budget
Braunschweig
Berlin
About PTB
Braunschweig
Optics
Ionizing
Radiation
Electricity
Administrative
Services
Mechanics
and Acoustics
Chemical Physics
and Explosion
Protection
Precision
Engineering
Cross-Sectional
Services
Legal and Inter-
national Metrology
QUEST
Institute at PTB
Fundamental Physics
for Metrology
MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection32020-11-05
Berlin
Temperature and
Synchrotron Radiation
Medical Physics and Metrological
Information Technology
4 MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection2020-11-05
2020-11-05 5 MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection
About usChemical Physics
and
Explosion Protection
Analytical chemistry of the
gas phase
Spectrometric gas analysis
— Capabilities in 3.42 —
Laser spectroscopy
• Direct traceable methods for amount fraction measurements
→ the TILSAM method
• Direct laser absorption spectroscopy (TDLAS/QCLAS) –
development of spectrometers
• Field TDLAS instruments
(ground based, balloon, airplanes)
• Cavity-enhanced (CRDS/CEAS) and comb-assisted
techniques
• Optical isotope ratio spectroscopy (OIRS)
▪ Thermo (δ13C-CO2 and δ18O-CO2)
▪ Picarro (δ13C-CO2 and δ13C-CH4 )
▪ Los Gatos (triple water analyser)
2020-11-05 6 MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection
Current running projects
16ENV08-IMPRESS2
16ENG05-BioMethane
17IND09-MetAMC2
EURAMET 1498 - pilot studybilateral comparison
100 µmol/mol HCl in N2
CCQM-Kxxkey comparison
30 µmol/mol HCl in N2
Laser spectroscopy
19ENG03-MefHySto
16ENV06-SIRS
19ENV05-STELLAR
HCl related
CO2 isotopes
CH4 /CO2 isotopesH2O in H2
19ENV09-MetroPEMS
NO2 emission
DFG SPP1924-HALO
H2O in atmosphere
2020-11-05 7
Technique – dTDLAS
𝑥HCl =𝑘B ∙ 𝐴 ∙ 𝑇
𝑆 ∙ 𝑝 ∙ 𝐿
MetAMC2 Workshop on Advanced Optical Spectroscopy for Gas Detection
measured parameters
constants
molecular line data
Drive electronicData
acquisition
DetectorDiode laser
Gas cell
Measure spectral
absorbance (via
laser intensity)
Line area, A
Traceable inputs:
p, T, L, S, kB
Calculate traceable
amount fraction, xHCl
Laser
tuning
dTDLAS: direct tunable diode laser absorption spectroscopy