Reduction of nickel ions in mordenites with different SiO2/Al2O3 molar ratios

Author

Petranovskii, V. ; Pestryakov, A. ; Herandez, M.-A. ; Rivas, F.Chavez ; Ulloa, R.Zamorano ; Berlier, G. ; Coluccia, S. ; Simakov, A.

Author_Institution

Universidad Nacional Autónoma de México, Centro de Nanociencias y Nanotecnología, Ensenada, B.C., México

fYear

2012

fDate

18-21 Sept. 2012

Firstpage

1

Lastpage

4

Abstract

The aim of present work was to study the influence of SiO₂/Al₂O₃ molar ratio (MR) on nickel behavior in the mordenites with wide variation of MR during reduction in hydrogen flow. It was found that during reduction treatment variation of MR in mordenite from 10 to 206 influences reducibility and mobility of reduced nickel species. Stability of the reduced samples during storage in air at ambient conditions also depends on molar ratio. Variation of MR of mordenite does not change crystal structure, but results in different ionic properties. This effect is explained by variation of acidity of zeolite matrix in line with variation of chemical composition.

Keywords

alumina; catalysis; crystal structure; nanoparticles; nickel; pH; reduction (chemical); silicon compounds; zeolites; Ni; SiO₂-Al₂O₃; chemical composition variation; crystal structure; hydrogen flow; ionic properties; mordenite molar ratio variation; nickel behavior; nickel ion reduction; reduced nickel mobility; reduced nickel reducibility; reduction treatment; silica-alumina molar ratios; zeolite matrix acidity variation; Aluminum oxide; Copper; Ions; Nanoparticles; Nickel; Temperature measurement; SiO2/Al2O3 molar ratio; mordenite; nanoparticles; nickel; zeolites;

fLanguage

English

Publisher

ieee

Conference_Titel

Strategic Technology (IFOST), 2012 7th International Forum on

Conference_Location

Tomsk

Print_ISBN

978-1-4673-1772-6

Type

conf

DOI

10.1109/IFOST.2012.6357577

Filename

6357577