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- Publisher
- Springer Journals
- Copyright
- Copyright © 2018 by Korean Institute of Chemical Engineers, Seoul, Korea
- Subject
- Chemistry; Industrial Chemistry/Chemical Engineering; Catalysis; Materials Science, general; Biotechnology
- ISSN
- 0256-1115
- eISSN
- 1975-7220
- DOI
- 10.1007/s11814-018-0149-y
- Publisher site
- See Article on Publisher Site
Abstract
The azeotrope of methyl acetate methanol and water was isolated using extractive distillation with water as entrainer. The pressure-swing extractive distillation (PSED) process and vapor side-stream distillation column (VSDC) with the rectifier process were designed to separate the methyl acetate, methanol and water mixture. It was revealed that the VSDC with the rectifier process had a reduction in energy consumption than the PSED process. Four control schemes of the two process were investigated: Double temperature control scheme (CS1), Q R /F feedforward control of reboiler duty scheme for PESD (CS2), Q R /F feedback control scheme for VSDC (CS3), the feedback control scheme of sensitive plate temperature of side-drawing distillation column to dominate the compressor shaft speed (CS4). Feed flow and composition disturbance were used to evaluate the dynamic performance. As a result, CS4 is a preferable choice for separation of methyl acetate-methanol-water mixture. A control scheme combining the operating parameters of dynamic equipment with the control indicators of static equipment was proposed in this paper. It means using the sensitive plate temperature of side-drawing column to control the compressor shaft speed. This is a new control scheme for extractive distillation.
Journal
Korean Journal of Chemical Engineering – Springer Journals
Published: Nov 9, 2018