| 甲苯与甲醇侧链烷基化合成苯乙烯KX催化剂失活现象的研究 |
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| 引用本文： | 宋兰兰,李振荣,赵亮富,李文. 甲苯与甲醇侧链烷基化合成苯乙烯KX催化剂失活现象的研究[J]. 天然气化工, 2013, 0(2): 46-50 |
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| 作者姓名： | 宋兰兰 李振荣 赵亮富 李文 |
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| 作者单位： | 中国科学院山西煤炭化学研究所应用催化与绿色化工实验室;中国科学院研究生院化学与化学工程学院;中国科学院山西煤炭化学研究所煤转化国家重点实验室 |
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| 基金项目： | 国家高技术研究发展计划(863计划,2012AA051002) |
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| 摘 要： | 考察了甲苯、甲醇侧链烷基化反应KX催化剂的稳定性及失活现象。并采用XRD、N2物理吸附、DTG、SEM、NH3-TPD、CO2-TPD和ICP等方法对反应前后的催化剂进行了表征。结果表明,反应前后活性位变化和积炭不明显,对催化剂失活影响很小。随着反应时间延长,反应过程中产生大量的水导致分子筛骨架脱铝,晶体结构被严重破坏,这是催化剂失活的主要原因。增强催化剂骨架的水热稳定性是解决催化剂失活问题的关键。
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| 关 键 词： | 甲醇 甲苯 侧链烷基化 KX沸石催化剂 失活 |
Study on deactivation of KX zeolite for side-chain alkylation of toluene with methanol |
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| SONG Lan-lan,LI Zhen-rong,ZHAO Liang-fu,LI Wen. Study on deactivation of KX zeolite for side-chain alkylation of toluene with methanol[J]. Natural Gas Chemical Industry, 2013, 0(2): 46-50 |
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| Authors: | SONG Lan-lan LI Zhen-rong ZHAO Liang-fu LI Wen |
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| Affiliation: | 1.Laboratory of Applied Catalysis and Green Chemical Engineering,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;2.Department of Chemistry and Chemical Engineering,Graduate School of Chinese Academy of Sciences,Beijing 100049,China;3.State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China.) |
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| Abstract: | The stability and deactivation behavior of KX zeolite for the side-chain alkylation of toluene with methanol were investigated.The fresh catalyst and the spent catalyst were characterized by XRD,SEM,N2-physisorption,ICP,NH3-TPD,CO2-TPD and DTG.The results showed that the degree of carbon deposition and the change of active sites were too low to influence the deactivation,and the main cause for the deactivation of the catalyst was the break of framework topological structure of KX resulting from dealuminum. |
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| Keywords: | methanol toluene side-chain alkylation KX zeolite catalyst deactivation |
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