Effect of Co addition for carburizing process of Ti-oxide/SiO2 into TiC/SiO2
Effect of Co addition for carburizing process of Ti-oxide/SiO2 into TiC/SiO2
复制标题
DOI：
10.1016/j.apcata.2007.02.012
复制
发表时间：
2007-04
影响因子：
5.5
通讯作者：
Yasuhiro Iwama;N. Ichikuni;K. Bando;S. Shimazu
中科院分区：
文献类型：
--
作者：
Yasuhiro Iwama;N. Ichikuni;K. Bando;S. Shimazu
通过程序升温反应（TPR）法制备了Co促进的TiC/SiO2催化剂。采用连续浸渍法（sc）和共浸渍法（co）制备了Co-Ti/SiO2前驱体。采用X射线吸收精细结构（XAFS）和X射线衍射（XRD）对样品进行了表征。Co的加入方式影响TiC的渗碳程度。sc Co-TiC/SiO2的渗碳效果优于co Co-TiC/SiO2。在693 K时，sc Co-TiC/SiO2催化剂上噻吩加氢脱硫活性高于co Co-TiC/SiO2催化剂。HDS活性与TiC的渗碳程度有关。
Lowering the carburization temperature of Ti-oxide into TiC down to 1173K could be achieved by the addition of Co. Co-promoted TiC/SiO2catalysts were prepared by the temperature programmed reaction (TPR) method. Co–Ti/SiO2precursors 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/SiO2was better than that of co Co–TiC/SiO2. The activity of thiophene hydrodesulfurization reaction at 693K on sc Co–TiC/SiO2was higher than that on co Co–TiC/SiO2. The HDS activity was related to the carburization degree of TiC.