沸石
催化作用
淀粉
硅醇
催化裂化
热液循环
化学
水热合成
核化学
化学工程
无机化学
材料科学
有机化学
工程类
作者
Tengwei Chen,Cheng Gu,Ying Ouyang,Łi Zhuang,Zhen Yao,Kang Zou,Yongrui Wang,Yibin Luo,Xiaomei Shu
出处
期刊:Fuel
[Elsevier]
日期:2022-06-01
卷期号:318: 123696-123696
被引量:8
标识
DOI:10.1016/j.fuel.2022.123696
摘要
Zeolite Beta was directly synthesized by the hydrothermal method with crosslinked starch successfully. When the crosslinked starch was added, the zeolite Beta displayed a larger particle size, fewer external silanol groups, higher ratio of FAl/EFAl (tetrahedral-coordinated framework aluminum/octrahedral-coordinated non-framework aluminum), and higher B/L acid ratio (the ratio of Brönsted acid sites/Lewis acid sites) in comparison with the zeolite Beta-0 synthesized without crosslinked starch. And the zeolite Beta synthesized with crosslinked starch treated by phosphorus modification (P-Beta-S(X%)-SA and CAT-S) presented higher hydrothermal stability after hydrothermal treatment at 820 °C under 100% steam for 17 h. In the catalytic cracking reactions of light diesel oil and heavy oil, P-Beta-S(X%)-SA and CAT-S provided remarkably enhanced activity and higher gasoline and butene yield. The mechanism of synthesis of zeolite Beta synthesized with crosslinked starch was also shown.
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