Hydrogasification of biomass to produce high yields of methane

Details Hydrogasification of biomass to produce high yields of methane Hydrogasification of biomass to produce high yields of methane

1987-08-26

1989-04-18

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Production of hydrocarbon mixture from refuse or vegetation

252373, 423652, 585242, C07C 100

Patent

active

048229350

ABSTRACT:
A process for hydrogasification of biomass to produce high yields of methane utilizes a reactor capable of carrying out rapid pyrolysis. Biomass particles, hydrogen, particles of a suitable catalyst that has both cracking and hydrogenation activity, and heat are introduced into said reactor. Pyrolysis is carried out in a hydrogen-rich atmosphere under the following conditions: (a) a temperatue ranging from 500.degree. C. to 550.degree. C.; (b) a pressure equal to or greater than one atmosphere; (c) a gas residence time not exceeding two seconds; (d) a biomass particle residence time at least as long as the gas residence time; (e) a biomass particle size not exceeding 2 mm. The methane-rich product gas is then recovered. Conversion of carbon to methane of 69% has been attained using the process of the present invention.

REFERENCES:
patent: 4102938 (1978-07-01), Rao
patent: 4300009 (1981-11-01), Haag et al.
patent: 4618736 (1986-10-01), Benn et al.
patent: 4652686 (1987-03-01), Coenen et al.

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