| 徐会青,刘全杰.分子筛孔结构和酸性对二甲苯异构化反应性能影响[J].分子催化,2012,(3):252-256 |
| 分子筛孔结构和酸性对二甲苯异构化反应性能影响 |
| Effect of pore structure and acidity of |
| 投稿时间：2012-03-14 修订日期：2012-05-02 |
| DOI： |
| 中文关键词: 分子筛 二甲苯异构化 孔道结构 酸性 酸强度分布 |
| 英文关键词:molecular sieves xylene isomerization pore structure acidity acid strength distribution |
| 基金项目: |
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| 中文摘要: |
| 本文成功合成了几种具有典型结构的分子筛，并考察了这些分子筛的孔结构、酸性以及在二甲苯异构化反应中的反应性能。结果表明，对于二甲苯异构化反应，孔结构和酸性一样起着重要作用，孔结构决定了反应的类型或方式，而酸性质与反应的活性和选择性密切相关，一个好的碳八芳烃异构化催化剂要同时具备适宜的孔道结构和酸性，尤其是要具有较大的中强酸比例。 |
| 英文摘要: |
| In this paper, several molecular sieves with typical structures have been successfully synthesized. The pore structure and acidity of these molecular sieves were characterized by BET and NH3-TPD. Furthermore, the catalytic performance of these molecular sieves was investigated in xylene isomerization. The results indicated that the pore structure and acidity of catalysts are the key factors for xylene isomerization, the former is responsible the reaction type, while the latter was closely related to the reaction activity and selectivity. The xylene isomerization catalyst with high performance should have appropriate pore structure and acidity, especially a high ratio of medium strong acid sites. |
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