| 沈德建,刘宗章,张敏华.改性HZSM-5催化乙醇脱水制乙烯的研究[J].分子催化,2012,(3):225-232 |
| 改性HZSM-5催化乙醇脱水制乙烯的研究 |
| Ethylene Production by Catalytic Dehydration of Ethanol over Modified HZSM-5 Zeolites |
| 投稿时间：2012-03-28 修订日期：2012-05-02 |
| DOI： |
| 中文关键词: 乙醇, 乙烯, HZSM-5, 催化脱水 |
| 英文关键词:ethanol, ethylene, HZSM-5, catalytic dehydration |
| 基金项目: |
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| 摘要点击次数: 1892 |
| 全文下载次数: 3024 |
| 中文摘要: |
| 采用离子交换法用硝酸铁、硝酸钴和硝酸镍分别对HZSM-5分子筛进行改性，并在连续流动固定床微型反应装置上对催化剂进行了活性评价。评价结果表明在260℃下Ni-HZSM-5对乙醇脱水制乙烯反应的催化性能最好，乙醇转化率达99.3%，乙烯选择性达97.7%。表征结果表明Ni改性减少了分子筛的强酸量，增加了弱酸量，有利于乙醇转化率和乙烯选择性的提高。对Ni-HZSM-5催化剂上乙醇脱水制乙烯反应的工艺条件进行了考察，得到最佳工艺条件为：温度260℃，质量空速2h-1，乙醇浓度为50%(体积分数)。 |
| 英文摘要: |
| The catalytic dehydration of ethanol to ethylene has been investigated over Fe, Co, Ni ion exchanged modified HZSM-5 catalysts at the low temperature, and Ni-HZSM-5 exhibited the best conversion and selectivity (99.3% and 97.7%, respectively) at 260oC. Characterizations revealed that the improved catalytic performance of Ni-HZSM-5 could be attributed to the decrease of the strong acid sites and increase of weak acid sites by the modification with Ni. The effects of operation parameters on dehydration of ethanol to ethylene over Ni modified HZSM-5, such as reaction temperature, weight hourly space velocity and concentration of ethanol have also been investigated. |
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