Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing hydrocarbon
Reexamination Certificate
2007-06-26
2009-10-27
Lilling, Herbert J. (Department: 1657)
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing hydrocarbon
C435S157000, C435S160000, C435S161000, C435S168000, C435S252100, C435S289100, C435S303200
Reexamination Certificate
active
07608439
ABSTRACT:
The invention provides a method to decrease emission of carbon dioxide from combustion of fossil fuels or other hydrocarbons and to enhance the efficiency of methane production from anaerobic biodigesters. The invention involves feeding carbon dioxide from the exhaust gas of hydrocarbon fuel combustion to an anaerobic biodigester where biomass is anaerobically fermented to produce methane. Carbon dioxide is an electron acceptor for anaerobic fermentation, and thus some of the carbon dioxide is reduced to methane, which can again be used for fuel. In this way, at least a portion of the exhaust gas CO2is recycled to form fuel methane instead of being released into the atmosphere. Thus, the net CO2emission from burning a given amount of fossil fuel is decreased. Adding carbon dioxide to an anaerobic fermentation also increases the efficiency and amount of methane production in the fermentation.
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McTavish Hugh
Offerman John D.
Lilling Herbert J.
McTavish Hugh
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