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題名 | Isopropyl Alcohol Dehydration over Chrominophosphate Catalysts(Ⅱ)--Deactivation=磷酸鉻觸媒上之異丙醇脫水反應(Ⅱ)--失活研究 |
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作者 | 郭勇志; 陳郁文; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷期 | 31:1 2000.01[民89.01] |
頁次 | 頁1-9 |
分類號 | 468.8 |
關鍵詞 | 磷酸鉻觸媒; 異丙醇; 脫水反應; 失活研究; Alcohol dehydration; Chrominophosphate; Coke; Deactivation; Shrinking core model; |
語文 | 英文(English) |
中文摘要 | 本研究討論磷酸鋁觸媒上之異丙醇脫水反應之失活現象,實驗係於一連續式流動微反應器,在423-573K及一大氣壓下進行,觸媒失活主要是因為結焦而非水的存在,其失活動力為一階,且失活現象可用縮核模式模擬。承積在觸媒上的碳量可用Voorhies實驗式來說明,在活性位置上的積炭會影響其鄰近位置的活性。 |
英文摘要 | The progressive deactivation of isopropyl alcohol dehydration over the chrominophosphate catalysts was studied by a continuous-flow micro-reactor in the temperature range of 423-573 K at atmospheric pressure. The deactivation of the catalyst is mainly due to coke deposit, rather than the presence of water. The deactivation kinetics is first order and the decaying phenomena can be described by the shrinking core model. The coke deposition was cor-related by the modified Voorhies empirical equation. Coke deposition on an active site would in-fluence the activities on its neighboring sites. |
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