研究生: |
謝敏聰 Min-tsung Hsieh |
---|---|
論文名稱: |
活性碳的氯化對Ni/C觸媒羰基化活性的影響 The Effect of the Chlorination of Activated Carbon on the Activity of Ni/C Catalyst in Carbonylation |
指導教授: |
劉端祺
Tuan-chi Liu |
口試委員: |
蕭敬業
Ching-yeh Shiao 陳郁文 Yu-wen Chen |
學位類別: |
碩士 Master |
系所名稱: |
工程學院 - 化學工程系 Department of Chemical Engineering |
論文出版年: | 2006 |
畢業學年度: | 94 |
語文別: | 中文 |
論文頁數: | 85 |
中文關鍵詞: | 甲醇羰基化 、醋酸 、醋酸甲酯 |
外文關鍵詞: | methanol carbonylation, acetic acid, methylacetat |
相關次數: | 點閱:185 下載:0 |
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本論文旨在討論以含氯活性碳為載體所製備的Ni/C-Cl觸媒特性,所使用的含氯活性碳,以鹽酸及次氯酸鈉反應產生氯氣,讓活性碳吸附製成,所製備的觸媒以SEM-EDX、TPD、X-ray及APT滴定等方式鑑定其物性及化性,並以連續流動式微反應器測定其甲醇羰基化活性。
在觸媒的鑑定中發現Ni/C-Cl觸媒比Ni/C觸媒具有更多的鹼性官能基,且能吸附更多的反應物(甲醇和一氧化碳),反應後的Ni/C-Cl亦能吸附更多的甲基碘,這些因素卻使得Ni/C-Cl觸媒的反應活性較Ni/C為高。不過當反應溫度超過270℃時,Ni/C-Cl上的氯和碘會大量流失,使得反應活性不再比Ni/C好,變得跟Ni/C觸媒十分相似。
在活性碳以吸附氯改質時,以不同吸附溫度改質的活性碳製備的觸媒,進行甲醇羰基化反應,其活性並無明顯差異。
The goal of this research is to explore the catalytic properties of a novel Ni/C-Cl catalyst prepared from chlorine containing activated carbon. The carbon is prepared by adsorbing chlorine generated from hydrochloric acid and sodium hypochloride. The properties of the catalyst thus prepared are then characterized by SEM-EDX, TPD, XRD and ATP. The activity of the catalyst in the carbonylation of methanol is measured in a continuous flow micro-reactor.
Comparing to Ni/C catalyst, Ni/C-Cl catalyst has more basic functional groups on its surface, and can adsorbs more reactants (methanol and carbon monoxide). After being on stream for a certain time, Ni/C-Cl catalyst also contains more methyl iodide than Ni/C. These factors make Ni/C-Cl has higher activity than Ni/C. The chlorine in Ni/C-Cl catalyst will disappear at a reaction temperature above 270 oC. The disappearance makes the activity of the Ni/C-Cl catalyst similar to that of Ni/C. Finally, the Ni/C-Cl catalysts prepared from the carbon of varied chlorinating temperature show about the same activity in the carbonylation of methanol.
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