Pa-256 低圧二段化による省エネ・装置化 : 東大・6社企業連合草本系バイオマスからのエタノール一貫生産技術開発(3)(ポスターセッション1:2.技術,研究発表,(ポスター発表))

概要

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In the previous study, we reported that the enhancement in the enzymatic saccharification by ammonia-based pretreatment is due to a combination of 1) chemical reactions which cleave ester linkages between hemicellulose and lignin, and 2) swells in cellulose crystalline structures. However, these two effects with single stage treatment are only obtained under high pressure conditions. Therefore, much energy is required to recover ammonia. In order to solve these challenges, we tried to divide treatment into two steps, that is, chemical reactions by using gaseous ammonia at high temperatures and low pressures followed by changing in cellulose conformation by using liquid ammonia at low temperature. As a result, two step processes had virtually the same effects, while reducing one-half lower ammonia dosage.
2012-01-18