Design of Reactive Distillation Process for the Production of Methyl Valerate
Date Issued
2014
Date
2014
Author(s)
Chung, Yao-Hsien
Abstract
Methyl valerate (VAME), also known as methyl pentanoate, is a methyl ester of pentanoic acid (valeric acid). VAME is usually used as fragrance in the production of beauty care, soap and laundry detergents. High purity of VAME can also be used as a kind of plasticizer. This study presents design details of the process for the manufacture of VAME. A reactive distillation column (RDC) is used in the production process to overcome equilibrium limitation of the esterification reaction. Two different designs, neat reactant and excess reactant design, are investigated with two different configurations in each design, including conventional and thermally-coupled configurations. Products, VAME and water, can be separated by two strippers and a decanter. A thermally coupled design is then developed to reduce the remixing effect in the rectifying section of the RDC. The simulation results show that in the neat design, 30% energy saving can be achieved by using the proposed thermally coupled reactive distillation process but only 17% of total annual costs can be saved due to the use of compressor. Total annual costs of excess design are much higher than that of neat design due to an additional distillation column with high energy consumption required to recover unreacted reactants.
Control strategies of both conventional and thermally-coupled configurations in neat design are investigated. The simulation results shows that thermally-coupled configuration can reject disturbances faster with smaller steady state value deviation from the setpoints.
Subjects
戊酸甲酯
酯化反應
反應蒸餾
熱耦合反應蒸餾
程序設計
程序控制
SDGs
Type
thesis
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