Preparation of CuHY catalyst via solid-state ion exchange method and its catalytic performance in isobutane/2-butene alkylation. Issue 37 (29th June 2021)

• Record Type: Journal Article
• Authors: Sun, Xinyan; Zhang, Xiang; Zheng, Tao; Liu, Haiyan; Zhang, Rui; Meng, Xianghai; Xu, Chunming; Liu, Zhichang
• Is Part Of: RSC advances. Volume 11:Issue 37(2021)
• Page Start: 23045
• Page End: 23054
• Publication Date: 2021-06-29
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d1ra03892c
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : CuHY prepared by solid-state ion exchange of HY zeolite with CuCl was used as a catalyst in isobutane/2-butene alkylation. The selectivity of C8 and trimethylpentanes over CuHY in alkylate are improved compared with those of HY. Abstract : CuHY samples prepared by solid-state ion exchange of HY zeolite with CuCl were used as catalysts in isobutane/2-butene alkylation. The results show that both the addition amount of CuCl and the calcination temperature affect the ion exchange degree. Cu + can be introduced into Y zeolite by replacing H + in the HY zeolite after the solid-state ion exchange, causing a decrease of the amount of Brønsted acid sites and an increase of that of Lewis acid sites. When taking CuHY as the catalyst in isobutane/2-butene alkylation, the 3d 10 4s 0 valence electron configuration of Cu + makes it favorable for inhibiting the oligomerization of 2-butene and accelerating the hydride transfer reaction rate by indirectly increasing the local isobutane/olefin ratio around the acid sites of the catalyst. As a result, the selectivity of C8 and trimethylpentanes over CuHY in alkylate are improved compared with those of HY.