Effect of Co addition for carburizing process of Ti-oxide/SiO2 into TiC/SiO2

被引：3

作者：

Iwama, Yasuhiro

Ichikuni, Nobuyuki ^{[1
]}

Bando, Kyoko K.

Shimazu, Shogo

机构：

[1] Chiba Univ, Fac Engn, Dept Appl Chem & Biotechnol, Inage Ku, Chiba 2638522, Japan

[2] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan

来源：

APPLIED CATALYSIS A-GENERAL | 2007年 / 323卷

关键词：

TiC catalyst; XAFS; Co additive; carburization;

D O I：

10.1016/j.apcata.2007.02.012

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：

Lowering the carburization temperature of Ti-oxide into TiC down to 1173 K could be achieved by the addition of Co. Co-promoted TiC/Si-2 catalysts were prepared by the temperature programmed reaction (TPR) method. Co-Ti/SiO2 precursors were prepared by use of the successive impregnation method (sc) and the co-impregnation method (co). Samples were characterized by X-ray absorption fine structure (XAFS) measurements and X-ray diffraction (XRD) results. The carburization degree of TiC was affected by the method of Co addition. The carburization degree of sc Co-TiC/SiO2 was better than that of co Co-TiC/SiO2. The activity of thiophene hydrodesulfurization reaction at 693 K on sc Co-TiC/ SiO2 was higher than that on co Co-TiC/SiO2. The HDS activity was related to the carburization degree of TiC. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：104 / 109

页数：6