文献类型：期刊文献

英文题名：Lower pressure heating steam is practical for the distributed dry dilute sulfuric acid pretreatment

作者：Shao, Shuai[1];Zhang, Jian[1,2];Hou, Weiliang[1];Qureshi, Abdul Sattar[1];Bao, Jie[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Tsinghua Univ, Minist Educ China, Key Lab Solid Waste Management & Environm Safety, Beijing 10084, Peoples R China

年份：2017

卷号：238

起止页码：744

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20171803617334);WOS:【SCI-EXPANDED(收录号:WOS:000402485500088)】；

基金：This research was supported by Natural Science Foundation of China (21306048), the National High-Tech Program of China (2014AA021901), and the Open Funding Project of the Key Laboratory for Solid Waste Management and Environment Safety (SWEMS2015-03), Ministry of Education of China, Tsinghua University (Beijing, China).

语种：英文

外文关键词：Heating steam pressure; Dry dilute sulfuric acid pretreatment; Distributed pretreatment; Simultaneous saccharification and ethanol; fermentation (SSF); Computational fluid dynamics (CFD)

摘要：Most studies paid more attention to the pretreatment temperature and the resulted pretreatment efficiency, while ignored the heating media and their scalability to an industry scale. This study aimed to use a relative low pressure heating steam easily provided by steam boiler to meet the requirement of distributed dry dilute acid pretreatment. The results showed that the physical properties of the pretreated corn stover were maintained stable using the steam pressure varying from 1.5, 1.7, 1.9 to 2.1 MPa. Enzymatic hydrolysis and high solids loading simultaneous saccharification and fermentation (SSF) results were also satisfying. CFD simulation indicated that the high injection velocity of the low pressure steam resulted in a high steam holdup and made the mixing time of steam and solid corn stover during pretreatment much shorter in comparison with the higher pressure steam. This study provides a design basis for the boiler requirement in distributed pretreatment concept. (C) 2017 Elsevier Ltd. All rights reserved.