An efficient preparation method of Y zeolite-based catalyst for Isobutane-butene alkylation. (15th November 2022)

• Record Type: Journal Article
• Authors: Lin, Meng; Zhou, Shunli; Zhang, Chengxi; Li, Yongxiang; Wang, Chengqiang; Shu, Xingtian
• Is Part Of: Fuel. Volume 328(2022)
• Publication Date: 2022-11-15
• Subjects: Acid accessibility -- Diffusion -- Isobutane-butene alkylation -- Y zeolite-based catalyst -- Zeolite-binder interaction; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2022.125371
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: The diffusion performance and acid accessibility of Y zeolite-based catalyst were improved by the proposed one-step pressured treatment, which have promoted the catalyst's alkylation performance. Highlights: One-step pressured treatment for catalysts was green, simple and effective. One-step pressured treatment improved acid accessibility and diffusion performance by increasing mesopore volume. The pressured treatment could promote interaction between binders and zeolites. Under appropriate pressured treatment, the alkylation reaction lifetime of zeolite-based catalyst increased by 17%. Abstract: A green and effective treatment method of Y zeolite-based catalyst was proposed, which greatly improved the acid accessibility and diffusion performance while maintaining high acidity. Different from the traditional treatment, the shaped catalyst is subjected to only one pressured treatment to complete solid state ion exchange, binder bonding and pore expansion. The characterization results showed that the bonding of binders could protect zeolites' structure under pressured treatment, acid accessibility and diffusion performance were improved due to dealumination. Meanwhile, the pressured environment promoted the zeolite-binder interaction and the migration of Al species from binders into zeolite framework. There is a balance between dealumination and zeolite-binder interaction under pressured treatment. NY-DPA-1 performed best with a lifetime of 84 h, which could coordinate acidity and porosity to make the alkylation reaction lifetime increased by 17 %.