CHARACTERIZATION OF SILICA SUPPORTED NI AND MG BASIC CARBONATE CATALYST PRECURSORS

被引：5

作者：

BABU, GP

GHUGE, KD

RAMMOHAN, SV

KRISHNAN, V

BHAT, AN

机构：

[1] Hindustan Lever Research Centre, Andheri (E), Bombay

来源：

CATALYSIS LETTERS | 1992年 / 15卷 / 1-2期

关键词：

NI/SIO2; MG-DOPING; THERMAL STUDIES; INFRARED STUDIES;

D O I：

10.1007/BF00770902

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In Mg-doped Ni-silica catalyst precursors, magnesium preferentially precipitates as basic carbonate species by isomorphous substitution of nickel in basic nickel carbonate network. This has been confirmed by thermal and infrared studies. Presence of magnesium decreases the reducibility of neighbouring nickel atoms due to electronic effects and also acts as spacer/barrier thus minimizing sintering via nickel particle migration. As a consequence, the nickel dispersion in Mg/Ni-silica samples is higher than in Ni-silica samples at all SiO2/Ni ratios.

引用

页码：95 / 103

页数：9

共 14 条

[1]

BABU GP, 1990, INDIAN J CHEM A, V29, P1094

[2] THE STOICHIOMETRY OF HYDROGEN AND CARBON-MONOXIDE CHEMISORPTION ON ALUMINA-SUPPORTED AND SILICA-SUPPORTED NICKEL [J].