Effect of hydrothermal treatment on the structure and properties of Ni/A12O3 catalyst

被引：0

作者：

Gong, YL ^{[1
]}

Lan, X ^{[1
]}

Jin, Y ^{[1
]}

机构：

[1] Tsing Hua Univ, Dept Chem Engn, Beijing 100084, Peoples R China

来源：

CHINESE JOURNAL OF CATALYSIS | 2003年 / 24卷 / 12期

关键词：

nickel; alumina; supported catalyst; hydrothermal treatment; methane; catalytic cracking;

D O I：

暂无

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The effect of hydrothermal treatment on the morphology, structure and composition of the Ni/Al2O3 catalyst was studied by means of SEM, XRD, XPS and DTA-TG. The results indicated that the atomic ratio of Ni to Al in the Ni/Al2O3 catalyst increased from 0.15 to 0.18 after hydrothermal treatment. The increase in the specific surface area of the catalyst was connected with the occurrence of the netlike structure for the Ni-bearing components at elevated temperatures. Ni(NO3)(2) adsorbed on the surface of Al2O3 particles in samples with and without hydrothermal treatment was converted to Ni0Al(2)O(4) crystallites after being sintered in air at 450degreesC for 2 h. The hydrothermal treatment of the Ni/Al2O3 catalyst was favorable for the improvement of the catalytic activity for methane cracking and the increase in the initial cracking rate of methane.

引用

页码：919 / 923

页数：5