Application of the dividing wall column to olefin separation in fluidization methanol to propylene (FMTP) process

Xiaolong Ge; Botong Liu; Xigang Yuan; Yiqing Luo; Kuo-Ksong Yu

doi:10.1016/j.cjche.2017.03.018

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Application of the dividing wall column to olefin separation in fluidization methanol to propylene (FMTP) process

Article | Updated：2026-01-06

- Application of the dividing wall column to olefin separation in fluidization methanol to propylene (FMTP) process
- Chinese Journal of Chemical Engineering Vol. 25, Issue 8, Pages: 1069-1078(2017)
- Affiliations：
  
  1. College of Chemical Engineering and Materials and Science, Tianjin Key Laboratory of Marine Resources and Chemistry, Tianjin University of Science and Technology,Tianjin,China,300457
  2. State Key Laboratory of Chemical Engineering, Tianjin University,Tianjin,China,300354
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2017.03.018
  CLC：
- Published：2017
- Accepted：
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Xiaolong Ge, Botong Liu, Xigang Yuan, Yiqing Luo, Kuo-Ksong Yu. Application of the dividing wall column to olefin separation in fluidization methanol to propylene (FMTP) process[J]. , 2017, 25(8): 1069-1078.
DOI：

Xiaolong Ge, Botong Liu, Xigang Yuan, Yiqing Luo, Kuo-Ksong Yu. Application of the dividing wall column to olefin separation in fluidization methanol to propylene (FMTP) process[J]. , 2017, 25(8): 1069-1078. DOI： 10.1016/j.cjche.2017.03.018.

摘要

Abstract

Dividing wall column (DWC) is shown to be energy efficient compared to conventional column sequence for multi components separation

which is used for olefin separation in fluidization methanol to propylene process in the present work. Detailed design for pilot DWC was performed and five control structures

i.e. composition control (CC)

temperature control (TC)

composition-temperature control (CC-TC)

temperature difference control (TDC)

double temperature difference control (DTDC) were proposed to circumvent feed disturbance. Sensitivity analysis and singular value decomposition (SVD) were used as criterion to select the controlled temperature locations in TC

CC-TC

TDC and DTDC control loops. The steady simulation result demonstrates that 25.7% and 30.2% duty can be saved for condenser and reboiler by substituting conventional column sequence with DWC

respectively. As for control structure selection

TC and TDC perform better than other three control schemes with smaller maximum deviation and shorter settling time.

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