Effects of residence time, temperature, and pressure on the steam gasification of biomass
Considering biomass gasification as a three-step phenomenon comprising (1) pyrolysis, (2) secondary reactions in the gas phase, and (3) char gasification, researchers focused on the second step to determine the effects of temperature and residence time on product-gas formation, using the volatiles produced by cellulose pyrolysis. They also studied the effects of pressure on the heat of pyrolysis of cellulose. In the gas phase, steam-cracking reactions dominate the chemistry of biomass gasification. At temperatures above 1200/sup 0/F, these reactions proceed very rapidly and generate a hydrocarbon-rich gas containing commercial amounts of ethylene, propylene, and methane. Increased pressure appears to inhibit the gasification process. Transport reactors - characterized by large throughputs, high heating rates, modest pressures, and short residence times - appear to be ideally suited for biomass gasification.
- Research Organization:
- Princeton Univ., NJ
- OSTI ID:
- 5777896
- Journal Information:
- ACS Symp. Ser.; (United States), Journal Name: ACS Symp. Ser.; (United States) Vol. 144; ISSN ACSMC
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
090122* -- Hydrocarbon Fuels-- Preparation from Wastes or Biomass-- (1976-1989)
140504 -- Solar Energy Conversion-- Biomass Production & Conversion-- (-1989)
ALKANES
ALKENES
BIOMASS
CARBOHYDRATES
CELLULOSE
CHEMICAL REACTIONS
DECOMPOSITION
ENERGY SOURCES
ETHYLENE
GASIFICATION
HYDROCARBONS
METHANE
ORGANIC COMPOUNDS
POLYSACCHARIDES
PRESSURE EFFECTS
PRODUCTION
PROPYLENE
PYROLYSIS
RENEWABLE ENERGY SOURCES
SACCHARIDES
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES