| ZSM-5分子筛转化乙醇为乙醚的研究 |
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| 引用本文： | 邓景发,潘海水,张贵荣,严曼明,张西平,王怀明,董树忠.ZSM-5分子筛转化乙醇为乙醚的研究[J].化学学报,1988,46(4):321-326. |
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| 作者姓名： | 邓景发 潘海水 张贵荣 严曼明 张西平 王怀明 董树忠 |
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| 作者单位： | 复旦大学化学系;复旦大学现代物理研究所 |
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| 摘 要： | 用原位红外技术、程序升温热脱附和X射线光电子能谱研究了乙醇和乙醚在HZSM-5和PZSM-5上的吸附及表面状态, 并与催化乙醇为乙醚的活性和选择性相关联. 结果表明, 乙醇与质子酸中心作用形成吸附态乙醇, 该吸附态乙醇与气相乙醇反应生成吸附态乙醚, 然后从表面脱附. 磷的掺入能有效抑制积炭发生.
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| 关 键 词： | 乙醇 红外分光光度法 吸附 分子筛 Ｘ射线光电子谱法 ＺＳＭ-５沸石 程序升温脱附 表面分析 原位 乙醚 |
Studies on the conversion of ethanol to diethyl ether on ZSM-5 type zeolites |
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| DENG JINGFA,PAN HAISHUI,ZHANG GUIRONG,YAN MANMING,ZHANG XIPING,WANG HUAIMING,DONG SHUZHONG.Studies on the conversion of ethanol to diethyl ether on ZSM-5 type zeolites[J].Acta Chimica Sinica,1988,46(4):321-326. |
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| Authors: | DENG JINGFA PAN HAISHUI ZHANG GUIRONG YAN MANMING ZHANG XIPING WANG HUAIMING DONG SHUZHONG |
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| Abstract: | HZSM-5 and phosphorus-modified ZSM-5 zeolites have been studied by means of in situ IR spectroscopy, temperature- desorption and XPS for adsorption behavior and surface state, by flow method for measuring catalytic activity and selectivity of conversion of ethanol to di-Et ether. On ZSM-5 type zeolites having Broensted acid centers, the mechanism of the formation of di-Et ether may be supposed as follows: ethanol mol. is adsorbed on the hydroxyl group of Al-OH to form adsorbed species which then reacts with another mol. of ethanol in the gas phase to form an adsorbed di-Et ether mol., desorption of the latter from the catalyst surface furnished the final product in free state. The addition of phosphoric acid prevents coke deposit. |
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| Keywords: | ETHANOL INFRARED SPECTROPHOTOMETRY ADSORPTION MOLECULAR SIEVE X-RAY PHOTOELECTRON SPECTROMETRY ZEOLITE ZSM-5 TEMPERATURE PROGRAMMING DESORPTION SURFACE ANALYSIS IN-SITU ETHER |
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