利用HZSM-5沸石觸媒將含水乙醇催化轉製成汽油

Catalyzed Conversion of Aqueous Ethanol to Gasoline over HZSM-5 Zeolite Catalys

謝志誠(Jyh-Cherng Shieh) ； 巫廷璽(Ting-His Wu) ； 吳敬揚(Jing-Yang Wu) ； 張馬丁(Martin Chang) ； 劉安琪(An-Chi Liu) ； 周楚洋(Chu-Yang Chou) ； 周呈霙(Cheng-Ying Chou) ； 陳力騏(Richie Chen)

《農業機械學刊》 19卷1期 (2010/03) Pp. 9-22

https://doi.org/10.30062/JAM.201003.0002

摘要

本研究利用HZSM-5沸石觸媒（Si/Al = 45）將含水乙醇轉換成以液態產物為主之碳氫化合物，並探討進料含水率、重量時空速度、溫度與壓力對產物產率之影響，找出最適液態產物之反應條件為：含水率28%（w/w）、重量時空速度4.30 h^（-1）、溫度350°C、壓力60 kg/cm^2。在最適條件下，液態產物產量可達碳氫化合物理論產量之70%。其次，於最適條件下，進行不同再生機制之長時間反應－再生－反應試驗，探討觸媒之活性與使用效率。再生係先以He氣流對留置在反應器內之觸媒沖刷30分鐘，再於550°C下，載入流速25 mL/min之空氣鍛燒2小時。結果顯示，觸媒之活性雖可經再生程序予以回復，卻無法完全回復，且在歷經40小時反應後，不論何種再生機制，均無法再回復其活性。長時間反應期間選用合適之再生機制，可提高觸媒之使用效率10%以上。轉製所得之液態產物，經與市售九五無鉛汽油比較，兩者主要成份相近。

關鍵字

乙醇 ； 沸石 ； 觸媒 ； 汽油 ； 活性

並列摘要

The purpose of this study was to convert aqueous ethanol to liquid hydrocarbons over HZSM-5 zeolite catalyst (Si/Al = 45). The effect of water content in the feed, weight hourly space velocity (WHSV), reaction temperature and ethanol partial pressure were studied in the catalytic conversion. The optimal conditions for the formation of liquid hydrocarbons were as follows: water content 28% (w/w), WHSV 4.30 h^(-1), temperature 350°C and partial pressure 60 kg/cm^2. Under optimal conditions, the yield of liquid hydrocarbons reached 70%. Furthermore, in order to examine the activity and efficiency of catalyst, two long term reaction-regeneration experiments were performed under different regeneration protocol. The catalyst was regenerated under He flow for 30 min, followed by calcination at 550°C for 2 h under air flow of 25 mL/min. The results showed that catalyst regeneration cannot regain the full activity of the fresh one. The activity of catalyst was unrecoverable after 40 h no matter what regeneration protocol was used. However, appropriate regeneration protocol would improve the efficiency of catalyst by more than 10%. The major composition of liquid hydrocarbons from ETG was similar to that of 95 unleaded gasoline

並列關鍵字

Ethanol ； Zeolite ； Catalyst ； Gasoline ； Activity