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In relation to this article, we declare that there is no conflict of interest.
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Received August 27, 2016
Accepted November 3, 2016
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Controllability of separate heat pump distillation for separating isopropanol-chlorobenzene mixture

College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Korean Journal of Chemical Engineering, March 2017, 34(3), 866-875(10), 10.1007/s11814-016-0313-1
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Abstract

The isopropanol-chlorobenzene mixture is separated via separate heat pump distillation (SHPD) to achieve significant energy savings. Rigorous steady state and dynamic characteristics for this SHPD process are simulated using Aspen Plus and Aspen Plus Dynamics. Optimized operation conditions including vapor flow rate to compressor are developed on the condition of minimum total annual cost. Two control strategies are proposed to solve feed disturbance issues and the improved structure with QRe/F (lower column reboiler duty/feed flow rate) ratio scheme can maintain the two product purities requirement with smaller transient deviation and shorter settling time.

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