Rapid evaluation of reaction conditions on coal pyrolyzates using coupled pyrolysis GC/MS
- Univ. of North Dakota Energy and Minerals Research Center, Grand Forks (USA)
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 voltaile 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 pyrolyzed under thelium at 700 C for ten minutes. The volatile products (primarily benzene and alkylbenzenes, phenol and alkylphenols, dihydroxybenzenes, and methoxyphenols) were swept 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:
- 5287446
- Report Number(s):
- CONF-8806136--
- Journal Information:
- Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA), Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA) Vol. 33:2; ISSN 0569-3772; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010404 -- Coal
Lignite
& Peat-- Gasification
010405 -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
BROWN COAL
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMATOGRAPHY
COAL
COAL GASIFICATION
COAL LIQUEFACTION
COAL TAR
DECOMPOSITION
ENERGY SOURCES
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
GASIFICATION
KINETICS
LIGNITE
LIQUEFACTION
MASS SPECTROSCOPY
MATERIALS
MATTER
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POTASSIUM CARBONATES
POTASSIUM COMPOUNDS
PYROLYSIS
REACTION KINETICS
SEPARATION PROCESSES
SODIUM CARBONATES
SODIUM COMPOUNDS
SPECTROSCOPY
STEAM
STRUCTURAL CHEMICAL ANALYSIS
TAR
TEST FACILITIES
THERMOCHEMICAL PROCESSES
VOLATILE MATTER