Design and Control of Heterogeneous Reactive Distillation System
Date Issued
2004
Date
2004
Author(s)
Chen, Yi-Wei
DOI
zh-TW
Abstract
Abstract
Last decade has seen renewed interest in reactive distillation. Malone and Doherty (2000) summarize recent progresses. Most of the work focuses on steady-state design and analysis for specific chemical systems. In this work, we study a specific class of reactive distillation: heterogeneous reactive distillation (similar to heterogeneous azeotropic distillation). By heterogeneous reactive distillation, we mean two-liquid phase exists in the reflux drum and a decanter is used for liquid-liquid separation. At the conceptual design stage, we look at the appropriateness of using a decanter in producing high purity product. For esterification reactions, heavy esters such as butyl acetate and amyl acetate fall into this category. Next, a systematic procedure is devised for the design of this type of reactive distillation. Results show that feed location is the dominant optimization variable. For example, 33% and 30% energy saving can be achieved for the butyl acetate and amyl acetate, respectively, simply by arranging the feeds optimally. Since the top product composition is determined by the tie-lines, intuitively, we are dealing with a single-input-single-output (bottoms composition) system. Unfortunately, as pointed out by Luyben (2000), we have to control an internal composition (or temperature) in order to achieve material balance for the reaction/separation system. Therefore, we have a 2
Subjects
酯化反應
乙酸戊酯
反應蒸餾
觸媒老化
乙酸丁酯
reactive distillation
butyl acetate
amyl acetate
catalyst deactivation
esterification
two-liquid phase
Type
thesis
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