Rapid evaluation of reaction conditions on coal pyrolyzates using coupled pyrolysis GC/MS
- Univ. of North Dakota Energy and Minerals Research Center, Box 8213, University Station, Grand Forks, ND (US)
The optimization of processes using coal as a carbon source for reaction with steam to produce hydrogen requires an understanding of the composition of the volatile components released during the charring process. A coupled pyrolysis GC/MS method has been developed to rapidly evaluate the effect of reaction conditions, including catalysts used to accelerate the char-steam reaction on the composition of the coal pyrolyzate. Four samples (one uncatalyzed and three catalyzed with 10 wt% CaCO/sub 3/, K/sub 2/CO/sub 3/, and Na/sub 2/CO/sub 3/, respectively) of a North Dakota (Velva) lignite were pyrolized under helium at 700/sup 0/C for ten minutes. The volatile products (primarily benzene and alkylbenzenes, phenol and alkylphenols, dihydroxybenzenes, and methoxyphenols) were spept from the pyrolysis chamber directly into a capillary gas chromatographic column and cryogenically trapped prior to GC/MS analysis. While simulated distillation plots for the uncatalyzed Velva and three catalyzed samples were similar, dramatic reductions in the amounts of catechols and guaiacols were observed in the K/sub 2/CO/sub 3/ and Na/sub 2/CO/sub 3/ catalyzed samples.
- OSTI ID:
- 6779566
- Report Number(s):
- CONF-8806136-
- Journal Information:
- Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States), Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States) Vol. 33:2; ISSN ACGPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010409* -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
014000 -- Coal
Lignite
& Peat-- Combustion
08 HYDROGEN
080107 -- Hydrogen-- Production-- Coal Gasification
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AROMATICS
BENZENE
BROWN COAL
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CATALYSTS
CHARS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL
COMBUSTION PRODUCTS
DECOMPOSITION
ELEMENTS
ENERGY SOURCES
EVALUATION
FEDERAL REGION VIII
FLUID FLOW
FLUIDS
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
GAS FLOW
GASES
HELIUM
HYDROCARBONS
HYDROGEN PRODUCTION
KINETICS
LIGNITE
LIQUID COLUMN CHROMATOGRAPHY
MATERIALS
NONMETALS
NORTH AMERICA
NORTH DAKOTA
OPTIMIZATION
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
PYROLYSIS
PYROLYSIS PRODUCTS
RARE GASES
REACTION KINETICS
SEPARATION PROCESSES
SODIUM CARBONATES
SODIUM COMPOUNDS
THERMOCHEMICAL PROCESSES
USA