Effect of calcination temperature on structure and performance of Ni/TiO2-SiO2 catalyst for CO2 reforming of methane

被引：47

作者：

Zhang, Sanbing ^{[1
,2
]}

Wang, Jiankang ^{[1
,2
]}

Wang, Xiaolai ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China

[2] Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China

来源：

JOURNAL OF NATURAL GAS CHEMISTRY | 2008年 / 17卷 / 02期

关键词：

Ni/TiO(2)-SiO(2) catalyst; sol-gel; CO(2) reforming; methane;

D O I：

10.1016/S1003-9953(08)60048-1

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The influence of calcination temperature on the structure and catalytic behavior of Ni/TiO(2)-SiO(2) catalyst, for CO(2) reforming of methane to synthesis gas under atmospheric pressure, was investigated. The results showed-that the Ni/TiO(2) SiO(2) catalyst calcined at 700 degrees C had high and stable activity while the catalysts calcined at 550 and 850 degrees C had low and unstable activity. Depending on the calcination temperature, one, two, or three of the following Ni-containing species, NiO, Ni(2.44)Ti(0.72)Si(0.07)O(4), and NiTiO(3) were identified by combining the temperature programmed reduction (TPR) and X-ray diffraction (XRD) results. Their reducibility decreased in the sequence: NiO>Ni(2.44)Ti(0.72)Si(0.07)O(4)>NiTiO(3). It suggests that high and stable activities observed over the Ni/TiO(2)-SiO(2) catalyst calcined at 700 degrees C were induced by the formation of Ni(2.447)Ti(0.72)Si(0.07)O(4) and smaller NiO species crystallite size.

引用

页码：179 / 183

页数：5

共 28 条

[1] PARTIAL OXIDATION OF METHANE TO SYNTHESIS GAS-USING CARBON-DIOXIDE [J].