Title :
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
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;
Conference_Titel :
Strategic Technology (IFOST), 2012 7th International Forum on
Conference_Location :
Tomsk
Print_ISBN :
978-1-4673-1772-6
DOI :
10.1109/IFOST.2012.6357577
