Realumination of MCM-22 Zeolite and Its Application in Alkylation Reaction

• Published in: Catalysis letters Vol. 144; no. 7; pp. 1223 - 1232
• Main Authors: Liu, Kefeng, Liu, Shenglin, Xie, Sujuan, Wei, Huijuan, Song, Chao, Li, Xiujie, Xu, Longya
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-07-2014; Springer; Springer Nature B.V
• Subjects: Alkenes; Alkylation; Aluminum compounds; Aluminum oxide; Benzene; Catalysis; Catalytic activity; Catalytic converters; Chemistry; Chemistry and Materials Science; Exact sciences and technology; General and physical chemistry; Industrial Chemistry/Chemical Engineering; Ion-exchange; Olefins; Organometallic Chemistry; Physical Chemistry; Surface physical chemistry; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Zeolites; Zeolites: preparations and properties; LPG; Realumination; Benzene; MCM-22; Alkylation; Heterogeneous catalysis; Zeolite
• ISSN: 1011-372X; 1572-879X
• DOI: 10.1007/s10562-014-1256-y

A mechanism of the realumination process was proposed when MCM-22 was post-treated in Al(NO
3
)
3
solution. Al atoms would deposit into zeolite with the amorphous alumina form, or insert into the framework by substituting Si atoms on certain T sites near the surface. The realumination process increased the amount of acid sites on the surface of MCM-22, significantly improved the catalytic activity and stability for olefins conversions in the alkylation of benzene with diluted olefins.
Graphical Abstract