Hydrothermally stable mesoporous aluminosilicates with moderate acidity via degradation-assembly process and improved catalytic properties

Hydrothermally stable mesoporous aluminosilicates with moderate acidity via degradation-assembly process and improved catalytic properties

Type	Journal Article
Author	Hongtao Liu
Author	Xiaozheng Zhao
URL	http://link.springer.com/article/10.1007/s10934-014-9783-x
Volume	21
Issue	4
Pages	379-386
Publication	Journal of Porous Materials
Date	2014/08/01
Abstract	Describes synthesis of mesoporous aluminosilicates with hydrothermal stability and moderate acidity by assembly of microporous zeolite precursors obtained by the degradation of zeolite NaY, denoted as degradation-assembly (DA) technique. By controlling the degradation degree of matrix NaY, researchers achieved precursors with larger spatial volume and stronger rigidity. Characterization results revealed that the walls of the mesophase in MDA (mesoporous aluminosilicate obtained by DA method) composed of the preformed zeolite Y building units and the moderate acidity was inherited from the introduced precursors. This suggests that the more mature assembly units accounted for the increased acidity of MDA with more Al species retained in the framework of mesophases. The resulting aluminosilicates with simultaneously moderate acidity and hydrothermal stability exhibited superior catalytic properties when used in heavy oil catalytic cracking catalysts.