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US 4,822,935 AGranted
Hydrogasification of biomass to produce high yields of methane
OwnerDonald S. Scottinventor
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OwnerDonald S. Scottinventor
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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.
A process of hydrogasification of biomass for producing high yields of methane, said process comprising introducing biomass particles, hydrogen, particles of a catalyst that has both cracking and hydrogenation activity and heat into a reactor capable of carrying out rapid pyrolysis, mixing said biomass particles with said catalyst particles in said reactor in a hydrogen-rich atmosphere, carrying out said pyrolysis under the following reaction conditions:
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