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| 題 名 | A Kinetic Study on the Hydrogenolysis of Sorbitol over Raney Nickel Catalysts=山梨糖醇觸媒氫解反應動力學之研究 |
|---|---|
| 作 者 | 張奉文; 郭坤土; 李俊男; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
| 卷 期 | 16:1 1985.01[民74.01] |
| 頁 次 | 頁17-23 |
| 分類號 | 468.8 |
| 關鍵詞 | 山梨糖醇; 反應; 動力學; 氫解; 觸媒; |
| 語 文 | 英文(English) |
| 中文摘要 | 本研究是以雷尼鎳（Raney Nickel）為觸媒，在1-l高壓批式反應器中進行實驗，以探討影響山梨糖醇裂解和甘油生成之反應條件（如溫度、觸媒用量、攪拌速率等），並探討其反應動力學。由實驗結果顯示，山梨糖醇氫解反應速率方程式對山梨糖醇濃度反應次數為一次，對氫氧壓力為-0.8次，對觸媒用量為二次，其反應活化能為9.2×10⁴ joule/mole。在壓力5.62×10□~1.04×10□Pa，觸媒用量3.5-13.8 wt%對山梨糖醇初重量條件下，山梨糖醇觸媒氫解反應速率方程式為-r□=kC□P¯□W²。由實驗結果，我們同時發現溫度高、壓力低及觸媒用量多能得到高山梨糖醇裂解度，但是甘油生成率則會降低；反之亦然。添加少量氧化鈣能同時提高山梨糖醇裂解度和甘油生成率。 |
| 英文摘要 | In this study experiments were performed in a one-liter autoclave to investigate the reaction conditions (temperature, hydrogen pressure, catalyst amount, and agitation rate, etc.) affecting the cracking of sorbitol and formation of glycerol. The reaction kinetics of sorbitol hydrogenolysis are also studied. The results show that the rate of sorbitol hydrogenolysis is first order with respect to sorbitol concentration, -0.8 order with respect to hydrogen pressure, and second order with respect to catalyst amount. The activation energies of sorbitol hydrogenolysis and glycerol formation are 9.2×10⁴ joule/mole and 9.9×10⁴ joule/mole respectively. The rate equation of catalystic sorbitol hydrogenolysis can be represented by -r□=kC□P¯□W² (P: 5.62×10□-1.04×10□Pa, W: 3.5-13.8 wt% based on the starting weight of sorbitol). It is also found that high temperature, low pressure, and large catalyst amount can obtain high sorbitol cleavage degree but low glycerol formation percentage, and vice versa. A small addition of calcium oxide will increase both sorbitol cleavage degree and glycerol formation percentage. |
本系統中英文摘要資訊取自各篇刊載內容。