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標題: | 戊酸甲酯之反應蒸餾製程設計 Design of Reactive Distillation Process for the Production of Methyl Valerate |
作者: | Yao-Hsien Chung 鍾耀賢 |
指導教授: | 陳誠亮 |
關鍵字: | 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, Methyl valerate,Esterification,Reactive distillation,Thermally-coupled reactive distillation,process design,process control, |
出版年 : | 2014 |
學位: | 碩士 |
摘要: | 戊酸甲酯是常見用在美容產品、香皂及洗衣精的香料,高純度的戊酸甲酯也可以當作塑化劑。本研究設計了兩種戊酸甲酯的製程及控制架構,包含了傳統反應蒸餾塔以及熱耦合反應蒸餾塔製程。反應蒸餾塔被用來打破酯化反應轉化率的限制。本研究也討論等量及過量進料兩種情況。產品戊酸甲酯和水能用一個分相槽及兩根氣提塔進行分離。熱耦合反應蒸餾塔製程能夠有效地減少30%的能耗,因為消除了再混合效應,但是在年總成本上只節省了17%,因為使用了壓縮機加壓以運送蒸餾塔塔頂汽體。過量進料設計的年總成本比等量進料設計還要高出許多,因為要使用額外的蒸餾塔來分離為反應完的反應物和產物。
最後,傳統反應蒸餾及熱耦合反應蒸餾製程的控制架構也在本研究中提出,模擬結果顯示此兩種結構能夠有效地排除產能擾動以及進料組成擾動。 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. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/56983 |
全文授權: | 有償授權 |
顯示於系所單位: | 化學工程學系 |
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