介孔-微孔复合材料的水热稳定性及其催化裂化性能

采用无模板剂的溶胶凝胶法制备了一系列具有均一介孔和MFI沸石微孔的复合材料.与MCM-41相比,包含silicalite-1沸石结构的复合材料的水热稳定性得到显著改善.1,3,5-三异丙苯的催化裂化反应结果表明,与商品HZSM-5沸石相比,包含ZSM-5沸石结构的复合材料具有更高的催化活性和抗积炭性能.三异丙苯的转化率和裂化产物的分布主要取决于介孔-微孔复合材料的介孔孔径,较小的介孔孔径有利于提高转化率和生成更多小分子裂化产物....

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Bibliographic Details
Published in催化学报 Vol. 32; no. 3; pp. 418 - 427
Main Author 韩伟 贾玉心 熊国兴 杨维慎
Format Journal Article
LanguageChinese
Published 中国科学院大连化学物理研究所催化基础国家重点实验室,辽宁大连,116023 2011
Subjects
1,3,5-三异丙苯
MFI沸石
介孔-微孔复合材料
催化裂化
水热稳定性
MFI沸石
1,3,5-三异丙苯
催化裂化
水热稳定性
介孔-微孔复合材料
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ISSN0253-9837
1872-2067
DOI10.1016/S1872-2067(10)60177-5

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Summary:采用无模板剂的溶胶凝胶法制备了一系列具有均一介孔和MFI沸石微孔的复合材料.与MCM-41相比,包含silicalite-1沸石结构的复合材料的水热稳定性得到显著改善.1,3,5-三异丙苯的催化裂化反应结果表明,与商品HZSM-5沸石相比,包含ZSM-5沸石结构的复合材料具有更高的催化活性和抗积炭性能.三异丙苯的转化率和裂化产物的分布主要取决于介孔-微孔复合材料的介孔孔径,较小的介孔孔径有利于提高转化率和生成更多小分子裂化产物.
Bibliography:HAN Wei,JIA Yuxin,XIONG Guoxing,YANG Weishen State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
meso-microporous composite; MFI zeolite; hydrothermal stability; 1,3,5-triisopropylbenzene; catalytic cracking
Meso-microporous composites show great promise for catalysis because of their variously-sized porous structures. A series of composites containing uniform mesopores and MFI zeolitic channels were prepared by a template-free sol-gel method. The composite con- taining silicalite-I structures was found to be much more hydrothermally stable than MCM-41. The composites with ZSM-5 structures showed higher catalytic activity and resistance to deactivation than commercial HZSM-5 in the catalytic cracking reaction of 1,3,5-triisopropylbenzene. The conversion and catalytic cracking product distribution of 1,3,5-triisopropylbenzene depended highly on the mesopore size of the composites. Higher conversions and small molecule cracking produ
ISSN:0253-9837
1872-2067
DOI:10.1016/S1872-2067(10)60177-5