| 纳米HMCM-49分子筛上1-己烯异构化/芳构化 |
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| 引用本文： | 房东,黄崇品,李冰洁,陈标华.纳米HMCM-49分子筛上1-己烯异构化/芳构化[J].北京化工大学学报(自然科学版),2007,34(5):453-457. |
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| 作者姓名： | 房东 黄崇品 李冰洁 陈标华 |
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| 作者单位： | 北京化工大学,化学工程学院,北京,100029;北京化工大学,化学工程学院,北京,100029;北京化工大学,化工资源有效利用国家重点实验室,北京,100029 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 采用低温老化，高温晶化两步法在Na2O-Al2O3-SiO2-HMI-H2O体系中水热动态合成了纳米MCM-49分子筛，采用XRD，SEM，N2吸/脱附曲线和NH3-TPD等手段对MCM-49分子筛结构和酸性质进行了表征，并在固定床微反应器上评价了HMCM-49分子筛对1-己烯异构化和芳构化催化性能。结果表明与微米HMCM-49分子筛相比，纳米HMCM-49分子筛比表面积明显增大，强酸量和总酸量有所下降。纳米分子筛具有更佳的异构化催化活性，异构化及芳构化产物总收率高于微米分子筛且积碳量少。
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| 关 键 词： | 纳米分子筛 1-己烯 异构化 芳构化 MCM-49 |
| 修稿时间： | 2007-04-11 |
Isomerization and aromatization of 1-hexene over nanosized HMCM-49 zeolites |
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| FANG Dong,HUANG ChongPin,LI BingJie,CHEN BiaoHua.Isomerization and aromatization of 1-hexene over nanosized HMCM-49 zeolites[J].Journal of Beijing University of Chemical Technology,2007,34(5):453-457. |
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| Authors: | FANG Dong HUANG ChongPin LI BingJie CHEN BiaoHua |
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| Institution: | 1 College of Chemical Engineering； 2 State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China |
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| Abstract: | Nanosized MCM-49 zeolite has been synthesized from an Na2O-Al2O3-SiO2-H2O mixture with hexamethyleneimine(HMI) as template using low temperature aging and high temperature crystallization steps.The HMCM-49 zeolite was characterized by different physicochemical techniques(XRD,SEM,TPD,and BET).Isomerization and aromatization of 1-hexene over different HMCM-49 zeolite samples was investigated in a fixed-bed micro-reactor.It was found that the total number of acid sites decreased and the surface area increased with decreasing crystal size of the zeolite.As a result of its large accessible external surface area and acidity,nanosized HMCM-49 shows higher activity for 1-hexene isomerization and aromatization and higher total yield of aromatics and isomerization products than micron-sized samples of the same zeolite. |
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| Keywords: | nanosized zeolite 1-hexene isomerization aromatization MCM-49 |
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