Jump to main content
Jump to site search

Issue 11, 2016
Previous Article Next Article

Substituting effect of Ce3+ on the AlPO-11 molecular sieve

Author affiliations

Abstract

Substituted AlPO-11 molecular sieve with Ce3+ was first prepared. The substitution was verified by characterization techniques and density functional theory. The results showed that both Al3+ and P5+ sites could be substituted. Cerium–oxygen tetrahedron was formed when Al3+ sites were replaced via isomorphous substitution. As for substituting the P5+ sites, Ce3+ coordinated with two or three oxygen atoms to form surface defects. Brønsted and Lewis acid sites appeared from the charge compensation and structure defects, respectively. The defective surface with higher interface energy resulted in particle aggregation and oriented growth. CeAPO-11 possesses a superior hydrothermal stability, which enables its application in a steam atmosphere with severely high temperatures. It was added as the bi-functional promoter (isomerization and dehydrogenation) to a fluid catalytic cracking catalyst. The results showed that CeAPO-11 increased the reaction conversion and the selectivity of aromatics and cycloparaffins.

Graphical abstract: Substituting effect of Ce3+ on the AlPO-11 molecular sieve

Back to tab navigation

Supplementary files

Article information


Submitted
12 Nov 2015
Accepted
16 Dec 2015
First published
21 Dec 2015

Catal. Sci. Technol., 2016,6, 3821-3831
Article type
Paper

Substituting effect of Ce3+ on the AlPO-11 molecular sieve

Y. Liu, L. Xu, L. Zhao, L. Wei, X. Liu and Z. Yan, Catal. Sci. Technol., 2016, 6, 3821
DOI: 10.1039/C5CY01938A

Social activity

Search articles by author

Spotlight

Advertisements