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US 2009/0151229 A1Published application
Carbon dioxide recovery from biofuels processes for the production of urea
AssigneeChevron U.S.A. Inc.
InventorJerry M. Rovner
Life of this patent
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Abstract
The present invention is generally directed to systems and methods for processing biomass for the production of biofuels, wherein carbon dioxide (CO2) produced as a by-product of such processing is reacted with ammonia (NH3) to produce urea (NH2)2CO, a common agricultural fertilizer. In some such embodiments, the urea so produced can be used as fertilizer for biomass production, such biomass ultimately being channeled back into the systems/methods for conversion to biofuels.
Claims20
A method comprising the steps of:
- a) processing a quantity of biomass such that at least a portion of said biomass is converted into a quantity of at least one biofuel, wherein CO2 is a by-product of said processing;
- and
- b) directing at least some of the by-product CO2 into a reaction chamber where it is reacted with NH3 to produce urea.
A system comprising:
- a) a processing subsystem for processing biomass into biofuel, wherein said processing produces CO2 as a by-product;
- and
- b) a reactor subsystem for directing at least some of the by-product CO2 into a reaction chamber where it is reacted with NH3 to produce urea and H2O.
Dependencies are inferred from the claim text.