| 研究生: |
黃文旗 Huang, Wen-Chi |
|---|---|
| 論文名稱: |
以奈米插層型水滑石催化丙酸與丁醇之酯化反應的研究 Study on the Esterification Reaction for Propionic Acid and n-Butanol Catalyzed by Nano-LHDs. |
| 指導教授: |
陳志勇
Chen, Chuh-Yung |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 化學工程學系 Department of Chemical Engineering |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 117 |
| 中文關鍵詞: | 丁醇 、丙酸 、酯化反應 、水滑石 |
| 外文關鍵詞: | esterification, LDHs, propionic acid, n-butanol. |
| 相關次數: | 點閱:50 下載:2 |
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本文利用共沈澱法合成一系列陰離子型Mg-Al和Zn-Al層狀無機水滑石(LDHs);再用不同碳數之長鏈脂肪酸[CH3(CH2)nCOOH, n=10, 14, 16] 當作插層劑來改質水滑石。利用FT-IR、X-ray、 EA和 ICP等儀器鑑定這些改質過的水滑石,並且說明這些脂肪酸以成功插入水滑石層間當中。由實驗結果得知,以CH3(CH2)10COOH做為插層劑其催化劑效果最好。因此本論文研究以Mg-Al12C、Zn-Al12C水滑石當觸媒催化丙酸丁酯之反應,並且研究水滑石和動力反應行為之關係,其中包含了Mg-Al12C、Zn-Al12C、水滑石粒徑大小、反應階數和活化能。
由實驗數據求出Mg-Al12C和Zn-Al12C水滑石之反應速率式
本實驗亦有利用滲透蒸發膜來探討其滲透蒸發膜對於酯化反應的影響,實驗結果得知高分子膜對於丙酸、丁醇和水的flux大於丙酸丁酯的flux,表示丙酸丁酯大都沒有滲透過去,使的水滑石產生凝聚現象。即使如此,在整個滲透蒸發的過程當中,產物水是被移除的,因此整體催化反應速率還是被提升。
A series of organic intercalated layered anionic clays, named LDHs, were synthesized using coprecipitation reaction. The LDH was intercalated with long chain fatty acids (CH3(CH2)nCOOH, n=10, 14, 16) between these layers to synthesis the modified LDHs. These modified LDHs were characterized by FT-IR, X-ray, EA, and ICP and showed that these fatty acids incorporation within the inter-gallery space. From the experiments, the CH3(CH2)10COOH as intercalated agent has promote the esterification reaction well than others. Hence, we used Mg-Al12C/LDHs, Zn-Al12C/LDHs as catalyst to promote the reaction, and to investigate the relations between LDHs and the kinetic behaviors, including Mg-Al12C/LDHs, Zn-Al12C/LDHs, particle size, reaction order, and activation energy. The rate expression for Mg-Al12C/LDHs and Zn-Al12C/LDHs
In addition, we also used a polymer membrane to study the effect on the esterification coupling with pervaporation. The results showed the that propionic acid, n-butanol, and H2O has a larger flux than butyl propionate, implying LDHs may form aggregations due to the butyl propionate was not removed completely. Even if this, the reaction rate was still enhanced because the product, H2O, in this process was extracted.
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