• 作者： Shiau, Ching-Yeh; Shiau, C.C.
• 中文摘要： 本文之目的在探討氣相中ETBE合成反應之動力學,觸媒為強酸性陽離子交換樹脂。研究之溫度範圍介於60-75.degree.C間,時間因子介於 0.63-5.53之間,乙醇之分壓從0.16到0.3atm,而異丁烯則從0.14到0.21atm。實驗結果顯示增加乙醇有抑制反應的效果,增加異丁烯則可促進反應。動力模式推估ETBE在強酸性陽離子交換樹脂上的合成反應時,兩個乙醇會占據一個活性點,而一個異丁烯會占據兩個活性點,表面反應為反應控制步驟。
• 英文摘要： Synthesis of Ethyl Tertiary Butyl Ether (ETBE) by the addition of ethanol and isobutene in the vapor phase was studied using strongly acidic cation exchanger resins as catalysts. The experimental data were obtained in a differential reactor operated at atmospheric pressure and 60-75.degree.C. The partial pressures of ethanol and isobutene were varied from 0.16 to 0.3 atm and from 0.14 to 0.21 atm, respectively. Time factor is in the range of 0.63- 5.53 gcat-hr/mol. The experimental data show that in the range studied ethanol has a strong inhibitory effect on the reaction while increasing isobutene pressure will enhance the reaction. However, if partial pressure of isobutene in the feed stream is too high, side reactions may occur to an undesired extent. An LHHW model rate expression has been derived to interpret the experimental results. The model shows that the surface reaction is the rate-controlling step with two ethanol molecules adsorbed on one active site, one isobutene molecule adsorbed on two active centers. The apparent activation energy was found to be 68.64kcal/mol.
• 中文關鍵字： 乙醇; 異丁烯; 合成; 陽離子交換樹脂; 動力學; 乙基第三丁酯
• 英文關鍵字： Ethanol; Isobutene; Synthesis; Cation Exchange Resin; Kinetics; Ethyl Tertiary Butyl Ether