Methods for pretreating biomass
First Claim
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1. A method for treating biomass comprising:
- adding gaseous ammonia at an elevated temperature to a reaction vessel containing biomass, wherein the reaction vessel is operated under a pressure of about 100 psi to about 1000 psi;
allowing the gaseous ammonia to condense on the biomass and react with water present in the biomass, to produce a pretreated biomass, wherein the reaction vessel pressure is released over a period of greater than two minutes; and
removing residual ammonia present in the reaction vessel.
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Abstract
A method of alkaline pretreatment of biomass, in particular, pretreating biomass with gaseous ammonia.
138 Citations
30 Claims
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1. A method for treating biomass comprising:
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adding gaseous ammonia at an elevated temperature to a reaction vessel containing biomass, wherein the reaction vessel is operated under a pressure of about 100 psi to about 1000 psi; allowing the gaseous ammonia to condense on the biomass and react with water present in the biomass, to produce a pretreated biomass, wherein the reaction vessel pressure is released over a period of greater than two minutes; and removing residual ammonia present in the reaction vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification