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題名 | 合成甲基第三丁基醚之反應蒸餾塔特性分析=Analysis of the Characteristics of MTBE Synthesis Via Reactive Distillation Column |
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作者 | 李恩各; 王聖潔; Lee, En-ko; Wang, San-jang; |
期刊 | 技術學刊 |
出版日期 | 20001200 |
卷期 | 15:4 2000.12[民89.12] |
頁次 | 頁651-657 |
分類號 | 468.8、468.8 |
語文 | chi |
關鍵詞 | 反應蒸餾; 甲基第三丁基醚; 多重穩態; Reactive distillation; MTBE; Multiple steady state; |
中文摘要 | 將進行反應和分離的反應器與蒸餾塔結合為一的反應蒸餾(reactive distillation)技術具有降低設備投資成本、提高反應之歸化率、充分利用反應熱、簡化反應之溫度控制、消除共沸物與簡化分離等優點。本研究以醚化反應合成甲基第三丁基醚—MTBE (methyl tert-butyl ether)之製程為研究對象。利用電腦製程模擬軟體HYSYS和ChemCAD,在一個裝有觸媒之反應蒸餾塔中,設計以甲醇和異丁烯為進料反應合成MTBE之程序,藉操作變數的改變,分析其對異丁烯轉化率、塔底MTBE純度、塔溫度分佈之影響,發現本程序具有多重穩態(multiple steady state)、高度非線性行為、對操作變數高敏感度和分離效應與化學反應間之交互作用等複雜特性,模擬結果顯示當甲醇和C4進料位置在反應區底部、進料中含微過量甲醇與鈍性物含量在64%,且控制回流比為7和和塔壓在8~10atm時,將可獲得高轉化率和高純度的產品。 |
英文摘要 | The coupling of chemical reaction and physical separation occurring in a reactive distillation column, the so-called reactive distillation technique, offers several significant advantages, such as reduced capital and operating costs, increased reaction conversion, increased energy efficiency through direct utilization of reaction heat, simplifying temperature control of reaction, eliminating azeotropes and simplification of separation. In this study, the synthesis of MTBE (methyl tert-butyl etner) by etherification reaction is selected as a case for investigation. Two computer process simulation software systems, HYSYS and ChemCAD, were utilized to simulate a reactive distillation column with catalyst which was fed with methanol and isobutene for the MTBE synthesis process. By varying operating variables the influence on isobutene conversion, the purity of MTBE at the bottom, and temperature distribution in the column can be analyzed. We discover that this process has characteristics of multiple steady states, highly nonlinear behavior, high sensitivity to operating variables, and interaction between separation effects and chemical reactions. The simulation results of reveal that when methanol and C4 were fed into the bottom of the reactive zone with a slight excess of methanol and 64% inert C4 content and when the reflux ratio was controlled at 7 with a column pressure of 8~10 atm high conversion and high purity bottom product could be obtained. |
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