Abstract: Thermo-chemical dealumination of zeolite Y is accompanied by formation of different mesopore types. Closed mesopores in the nuclei and open pores at the crystal surface occur due to decomposition of its corresponding frameworks which are unstable in steam. Third type of lattice mesopores is formed inside the microporous bulk after removal of aluminum atoms if the remaining hydroxyl nests dehydroxylate. This process leads to a rearrangement of the zeolite framework. In contrast to the observed phenomenon, the defects are healed by migrating of ortho-silicic acid (H4SiO4) from the surface to the hydroxyl nests under conditions of suitable steaming. Since mesopores in USY zeolites (ultra stable Y) reduce their catalytic activity and the sorption capacity, they could be minimized by a proper treatment.

Cite: Lutz W. , Shutilov R.A. , Gavrilov V.Y.
Pore Structure of USY Zeolites in Dependence on Steaming Condition
Zeitschrift fur Anorganische und Allgemeine Chemie. 2014. V.640. N3-4. P.577-581. DOI: 10.1002/zaac.201300403 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Aug 13, 2013
Accepted:	Jan 9, 2014
Published online:	Jan 9, 2014
Published print:	Mar 1, 2014

Identifiers:

Web of science:	WOS:000333192400008
Scopus:	2-s2.0-84902176532
Elibrary:	21629662
Chemical Abstracts:	2014:52374
Chemical Abstracts (print):	160:672357
OpenAlex:	W1544526038

Citing:

DB	Citing
Web of science	13
Scopus	13
Elibrary	12
OpenAlex	13

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