Flash pyrolysis of biomass with reactive and non-reactive gases
The process chemistry of the flash pyrolysis of biomass (wood) with the reactive gases, H/sub 2/ and CH/sub 4/ and with the non-reactive gases He and N/sub 2/ is being determined in an 1'' downflow tubular reactor at pressures from 20 to 1000 psi and temperatures from 600 to 1000/sup 0/C. With hydrogen, flash hydropyrolysis leads to high yields of ethylene, benzene and CO which can be used for the production of valuable chemical feedstocks and methanol transportation fuel. At reactor conditions of 50 psi and 1000/sup 0/C and approximately 1 sec residence time, the ethylene yield based on pine wood carbon conversion is 27%, for benzene it is 25% and for CO the yield is 39%, indicating that over 90% of the carbon in pine is converted to valuable products. Pine wood produces higher yields of hydrocarbon products than Douglas fir wood. The yield of ethylene is 2.3 times higher with methane than with helium or nitrogen, thus indicating a free radical reaction between CH/sub 4/ and the pyrolyzed wood. There appears to be no net production or consumption of methane. A preliminary process design and analysis indicate an economically competitive system for the production of ethylene, benzene and methanol based on the methanolysis of wood. 7 references, 13 figures, 1 table.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 6952236
- Report Number(s):
- BNL-34510; ON: DE84011545
- Country of Publication:
- United States
- Language:
- English
Similar Records
The flash pyrolysis and methanolysis of biomass (wood) for production of ethylene, benzene and methanol
Flash hydropyrolysis and methanolysis of biomass with hydrogen and methane
Related Subjects
BENZENE
SYNTHESIS
CARBON MONOXIDE
ETHYLENE
WOOD
PYROLYSIS
COMPARATIVE EVALUATIONS
CONIFERS
FLOWSHEETS
HELIUM
HIGH TEMPERATURE
HYDROGEN
METHANE
NITROGEN
PINES
ALKANES
ALKENES
AROMATICS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
DIAGRAMS
ELEMENTS
FLUIDS
GASES
HYDROCARBONS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PLANTS
RARE GASES
THERMOCHEMICAL PROCESSES
TREES
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