燃料化学学报2017，Vol.45Issue(11)：1376-1383,8.
HZSM-5/SAPO-11负载Cr2O3催化转化LPG制低碳烯烃活性研究
Catalytic performance of SAPO-11/HZSM-5 composite supported Cr2 O3 in the transformation of LPG to light olefins
摘要
Abstract
HZSM-5 ( core )/SAPO-11 ( shell ) composite molecular sieves were hydrothermally synthesized by crystallization of SAPO-11 outside HZSM-5 surface. After loading 10% Cr2 O3 , the pore distribution, acidity, and catalytic activity of the composite supported Cr2 O3 in the transformation of liquefied petroleum gas ( LPG) to ethene and propene were investigated. The results showed the HZSM-5 surface was coated with SAPO-11 microcrystalline of different thicknesses. With the increase of crystallization time, the shell thickness of the composite molecular sieves is increased; the mesoporosity and acidity can then be regulated by controlling the shell thickness. The composite supported Cr2 O3 exhibits superior activity in the transformation of LPG to olefins than the single molecular sieves or mechanically mixed ones. The Cr2 O3 catalyst supported on the composite by crystallization for 12 h gives the highest activity and selectivity to the target products;the feed conversion and the selectivity to ethene and propene are 42. 63% and 65. 89%, respectively, while the selectivities to CH4 and C5+are 6. 32% and 15. 48%, respectively.关键词
复合分子筛/Cr2O3/LPG/选择转化/乙烯+丙烯Key words
composite zeolite/chromium oxide/LPG/selective conversion/ethene and propene分类
化学化工引用本文复制引用
王康洲,张建利,范素兵,马清祥,赵天生..HZSM-5/SAPO-11负载Cr2O3催化转化LPG制低碳烯烃活性研究[J].燃料化学学报,2017,45(11):1376-1383,8.基金项目
The project was supported by the National Natural Science Foundation of China ( 21563024 ) and Graduate Innovation Program of Ningxia University (GIP2017024).国家自然科学基金(21563024)和宁夏大学研究生创新项目(GIP2017024)资助 （ 21563024 ）
