石油化工2026，Vol.55Issue(1)：31-38,8.DOI:10.3969/j.issn.1000-8144.2026.01.005
分子筛的拓扑结构对正辛烷裂解性能的影响
Influence of molecular sieve topology on n-octane cracking performance
周丽娜 1邢恩会 1罗一斌 1舒兴田1
作者信息
- 1. 中石化石油化工科学研究院有限公司 石油化工分子转化与反应工程全国重点实验室,北京 100083
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摘要
Abstract
The four molecular sieves of HSSZ-13,HZSM-57,HZSM-5,and Hβ with different topologies were characterized by XRD,XRF,SEM,NH3-TPD,N2 adsorption-desorption,and Py-FTIR.The four molecular sieves were used in the catalytic cracking of n-octane.The diffusion behavior of n-octane in molecular sieves and the catalytic cracking performance of molecular sieves were studied.Results indicate that when the mass ratio of molecular sieve to feedstock oil is 0.28,0.41,0.52,and 0.68,respectively,HZSM-57 molecular sieve exhibits superior selectivity in light olefins and CH4 to HZSM-5 and Hβ molecular sieve.This is attributed to favorable adsorption-diffusion properties of n-octane in HZSM-57 molecular sieve,optimal acid amount and suitable pore aperture of HZSM-57 molecular sieve,which promote the formation of primary cracking products.Additionally,its platy structure helps reduce the residence time of olefins,thereby suppressing side reactions such as hydrogen transfer.关键词
分子筛/拓扑结构/催化裂解/正辛烷Key words
molecular sieve/topology/catalytic cracking/n-octane分类
化学化工引用本文复制引用
周丽娜,邢恩会,罗一斌,舒兴田..分子筛的拓扑结构对正辛烷裂解性能的影响[J].石油化工,2026,55(1):31-38,8.
