Abstract
Alkali-treatment and Fe–Ti-loading were used to modify ZSM-5 zeolite. It was found that alkali-treatment created mesopore and Fe–Ti-loading improved the redox property of ZSM-5 catalyst, although both modifications led to a reduction of the total acid sites amount. The catalytic performance test indicated that the coexistence of meso–microporosity and Fe–Ti-loading on ZSM-5 catalyst is benefit to improve the yield of light olefins in catalytic cracking. The catalyst containing the combined modified ZSM-5 increased the propylene yield by 0.55wt% and total light olefins yield by 0.69wt% in catalytic cracking of Canadian LGO (light gas oil), compared with the reference HZSM-5.
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