Effect of relative volatilities on inferential temperature control of reactive distillation columns

Devrim B. Kaymak*, Denizhan Yilmaz, Ahmet Z. Gürer

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Several control structures for different types of reactive distillation columns have been studied in the literature. In general, these are the ternary systems with the chemistry A + B ↔ C and the quaternary systems with the chemistry A + B ↔ C + D. In some cases, the ternary system may also contain an additional component I which is inert in terms of reaction. The growing literature includes both ideal generic and real chemical systems. However, all papers dealing with ideal generic systems assume constant relative volatilities between adjacent components. This paper explores the effect of temperature-dependent relative volatilities on inferential temperature control of reactive distillation columns. Three types of chemical systems are considered: a ternary system without inert component, a ternary system with inert component, and a quaternary system. Significant differences are observed between the results of these systems. The inferential control structure of the ternary system without inert provides effective control for any case of relative volatilities. However, there are some offset in bottoms and distillate compositions of quaternary system. The results illustrate that the magnitude of the offset in distillate composition increases significantly with the increase in the temperature-dependency of relative volatility.

Original languageEnglish
Pages (from-to)8138-8152
Number of pages15
JournalIndustrial and Engineering Chemistry Research
Volume50
Issue number13
DOIs
Publication statusPublished - 6 Jul 2011

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