期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 4, 页码 5452-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b00320
关键词
ABE process; Azeotropic distillation; Dividing-wall column; Heat pumps
资金
- European Commission through the European Regional Development Fund
- Romanian state budget (acronym ASPiRE) [155/25.11.2016, POC P-37-449]
- Royal Society Wolfson Research Merit Award
The biobutanol stream obtained after the fermentation step in the acetone-butanol-ethanol process has a low concentration (less than 3 wt % butanol) that leads to high energy usage for conventional downstream separation. To overcome the high downstream processing costs, this study proposes a novel intensified separation process based on a heat pump (vapor recompression)-assisted azeotropic dividing-wall column (A-DWC). Pinch analysis and rigorous process simulations have been used for the process synthesis, design, and optimization of this novel sustainable process. Remarkably, the energy requirement for butanol separation using heat integration and vapor recompression assisted A-DWC is reduced by 58% from 6.3 to 2.7 MJ/kg butanol.
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