SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (1): 89-102.doi: 10.1016/j.cjche.2016.07.002

• Process Systems Engineering and Process Safety • Previous Articles     Next Articles

Interpreting the dynamic effect of internal heat integration on reactive distillation columns

Yang Yuan1, Liang Zhang1, Haisheng Chen1, Shaofeng Wang1, Kejin Huang1, Huan Shao2   

  1. 1 College of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China;
    2 Patent Examination Cooperation Center of the Patent Office, SIPO, Beijing 100081, China
  • Received:2016-04-05 Revised:2016-07-06 Online:2017-01-28 Published:2017-02-15
  • Supported by:
    Supported by the National Natural Science Foundation of China (21076015, 21376018, 21576014) and the Fundamental Research Funds for the Central Universities (ZY1503).

Abstract: In this work, the impact of internal heat integration upon process dynamics and controllability by superposing reactive section onto stripping section, relocating feed locations, and redistributing catalyst within the reactive section is explored based on a hypothetical ideal reactive distillation system containing an exothermic reaction:A+B↔C+D. Steady state operation analysis and closed-loop controllability evaluation are carried out by comparing the process designs with and without the consideration of internal heat integration. For superposing reactive section onto stripping section, favorable effect is aroused due to its low sensitivities to the changes in operating condition. For ascending the lower feed stage, somewhat detrimental effect occurs because of the accompanied adverse internal heat integration and strong sensitivity to the changes in operating condition. For descending the upper feed stage, serious detrimental effect happens because of the introduced adverse internal heat integration and strong sensitivity to the changes in operating condition. For redistributing catalyst in the reactive section, fairly small negative influence is aroused by the sensitivity to the changes in operating condition. When reinforcing internal heat integration with a combinatorial use of these three strategies, the decent of the upper feed stage should be avoided in process development. Although the conclusions are derived based on the hypothetical ideal reactive distillation column studied, they are considered to be of general significance to the design and operation of other reactive distillation columns.

Key words: Reactive distillation column, Internal heat integration, Process design, Process dynamics, Process control