| 合成甲醇Cu-Zn-Al催化剂中组成对其结构及催化性能的影响 |
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| 引用本文： | 赵九生,陈宝树,马福善,朱淳礼,康慧敏.合成甲醇Cu-Zn-Al催化剂中组成对其结构及催化性能的影响[J].化工学报,1988,39(5):562-569. |
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| 作者姓名： | 赵九生 陈宝树 马福善 朱淳礼 康慧敏 |
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| 作者单位： | 天津大学化学工程系,天津大学化学工程系,天津大学化学工程系,天津大学化学工程系,天津大学化学工程系 天津
,天津
,天津
,天津
,天津 |
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| 摘 要： | 本文研究了合成甲醇的Cu-Zn-Al催化剂组成(Cu/Zn比、Al含量)对催化剂结构及催化性能的影响.固定Al含量为20.7%(mol),在保证母体结构为单一FC(Feitknecht Compounds)的前提下(即排除结构的影响),发现Cu/Zn=1.8时催化剂活性最高.认为催化剂的活性与Cu-ZnO在表面的最佳搭配有关.固定Cu/Zn=1.8,降低Al含量,催化剂母体由FC和M两相构成,FC晶胞参数有变化.通过活性评价,找到了一种性能较优的催化剂.对Al的作用进行了解释.并根据准晶态的特点,提出甲醇合成铜基催化剂的活性单元为Cu——Zn(其中□代表晶格氧的空位).
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The Effects of the Composition of a Cubased Catalyst for Methanol Synthesis on its Structure and Property |
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| Zhao Jiusheng,Chen Baoshu,Ma Fushan,Zhu Chunli and Kang Huimin.The Effects of the Composition of a Cubased Catalyst for Methanol Synthesis on its Structure and Property[J].Journal of Chemical Industry and Engineering(China),1988,39(5):562-569. |
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| Authors: | Zhao Jiusheng Chen Baoshu Ma Fushan Zhu Chunli and Kang Huimin |
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| Affiliation: | Zhao Jiusheng,Chen Baoshu,Ma Fushan,Zhu Chunli and Kang Huimin
(Department of Chemical Engineering,Tianjin University,Tianjin) |
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| Abstract: | Effects of the composition (Cu/Zn and Al) of a Cu-based catalyst for methanol systhesis on its structure and property have been studied. When the aluminium content is fixed at 20.7mol% in a Cu-Zn-Al catalyst for methanol synthesis, the structure of the catalyst precursor kept to be pure FC at Cu/Zn<= 3.6 and maximum activity oi the methanol synthesis will be obtained at Cu/ Zn=1.83. It is thought that the activity ot the catalyst depends highly on the optimum ratio between Cu and ZnO. If the Cu/Zn ratio is fixed at 1.83 with lower Al content, the structure of the precursors will turn out to be a mixing phase of FC and M. The presence of M would have great influence on the structure of FC and on the activity of the catalyst. A good catalyst formula tion(Cu:Zn:Al = 58.5;32.0:9.5) for methanol synthesis can thus be obtained. The role of aluminium is being discussed. Based on the characteristic structure of the paracrystallite, it is suggested that the active center for methanol synthesis is Cu-Zn, where □ is the oxygen vacancy. |
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