文献类型：期刊文献

英文题名：Cascade enzymatic reactions for efficient carbon sequestration

作者：Xia, Shunxiang[1,2];Zhao, Xueyan[1,2];Frigo-Vaz, Benjamin[1,2];Zheng, Wenyun[3];Kim, Jungbae[4];Wang, Ping[1,2]

机构：[1]Univ Minnesota, Dept Bioprod & Biosyst Engn, St Paul, MN 55108 USA;[2]Univ Minnesota, Inst Biotechnol, St Paul, MN 55108 USA;[3]E China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab New Drug Design, Shanghai 200237, Peoples R China;[4]Korea Univ, Dept Chem & Biol Engn, Seoul, South Korea

年份：2015

卷号：182

起止页码：368

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20150900582444);WOS:【SCI-EXPANDED(收录号:WOS:000351101500048)】；

基金：The authors thank supports from the Biocatalysis Initiative grant from UMN, and the 'International Collaborative R&D Program' of the Korea Institute of Energy Technology Evaluation and Planning (KETEP, #20118510020020).

语种：英文

外文关键词：Carbon capture and storage; Isocitrate dehydrogenase; Aconitase; Carbon dioxide; Biocatalysis

摘要：Thermochemical processes developed for carbon capture and storage (CCS) offer high carbon capture capacities, but are generally hampered by low energy efficiency. Reversible cascade enzyme reactions are examined in this work for energy-efficient carbon sequestration. By integrating the reactions of two key enzymes of RTCA cycle, isocitrate dehydrogenase and aconitase, we demonstrate that intensified carbon capture can be realized through such cascade enzymatic reactions. Experiments show that enhanced thermodynamic driving force for carbon conversion can be attained via pH control under ambient conditions, and that the cascade reactions have the potential to capture 0.5 mol carbon at pH 6 for each mole of substrate applied. Overall it manifests that the carbon capture capacity of biocatalytic reactions, in addition to be energy efficient, can also be ultimately intensified to approach those realized with chemical absorbents such as MEA. (C) 2015 Elsevier Ltd. All rights reserved.