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題 名 | A Comparison of Methanol Formation Over Palladium and Rhodium Catalysts=鈀金屬與銠金屬觸媒合成甲醇之比較 |
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作 者 | 陳郁文; | 書刊名 | Journal of the Chinese Institute of Chemical Engineers |
卷 期 | 19:1 1988.01[民77.01] |
頁 次 | 頁53-62 |
分類號 | 460.025 |
關鍵詞 | 甲醇; 合成; 觸媒; 鈀金屬; 銠; |
語 文 | 英文(English) |
中文摘要 | 鈀與銠觸媒在適當改變觸媒狀態及適當及應條件下均具有極高之甲酵選擇性。本研究為了瞭解此兩種金屬之不同,對Pd/Si□,Rh black,Rh/□□,Rh/MgO和□進行一氧化碳氫化反應,並在反應進行中加入乙烯或乙醇做為偵測物以瞭解反應機構。研究結果顯示只有能產生乙醇之觸媒,才能在添加乙烯時經由一氧化碳插入反應產生丙醇。而不產生甲醇之觸媒仍可在添加乙醇時產生丙醇。因此能產生甲醇之反應位置與產生乙醇之反應位置不同。所有結果顯示對不同的觸媒其產生甲醇之反應位置均可能不同。而Rh/L□□之實驗結果顯示La□可能參與反應之進行。 |
英文摘要 | Recent work has suggested that the synthesis of methanol from CO and □ probably proceeds in general by a different mechanism than hydrocarbon and higher oxygenate synthesis. Both Pd and Rh can synthesize methanol with high selectivities using the proper catalyst formulation and reaction conditions. In order to develop a better understanding of the similarities and differences of methanol synthesis on such different catalysts, an investigation of CO hydrogenation over Pd/Si□, Rh black, Rh/L□□, Rh/Mg□ and Rh/Si□ has been carried out. The addition of probe reactant molecules (ethylene and ethanol) to the reaction stream was also utilized to provide increased insight. The results indicate that only those catalysts able to synthesize □ oxygenates directly were able to from □ oxygenates from ethylene by CO insertion. Catalysts lacking the ability to synthesize methanol were able to form □ oxygenates form reaction of added ethanol with the CO hydrogenation intermediates. Based on the results, it appears that the active sites for methanol formation are different from those for □ oxygenate formation. The results also suggest that a variety of types of sites may be active for methanol synthesis, and it can be hypothesized that different types of reaction sites may be responsible for methanol synthesis on different supported metal catalysts, even where the metal is the same. Results for Rh/□□ imply that La□ species possibly participate in the synthesis of methanol on that catalyst. |
本系統中英文摘要資訊取自各篇刊載內容。