Tungsten Carbon Cobalt | 60674-89-7

• 分子结构分类: 有机化合物 - 有机盐 - 有机金属盐
• 英文名称: Tungsten Carbon Cobalt
• 英文别名: tungsten cobalt carbon；cobalt;methane;tungsten
• CAS: 60674-89-7
• 化学式: CCoW
• 分子量: 254.854
• InChiKey: COLZOALRRSURNK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.63
• 重原子数：
  3
• 可旋转键数：
  0
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为产物：
  描述：

  乙烷 、 cobalt(II) tungstate 以 solid 为溶剂， 生成 Tungsten Carbon Cobalt
  参考文献：
  名称：

  Relevance of the Co1−xNixWO4 wolframite-type mixed oxide compositions on the synthesis and catalytic properties of W-based carbides

  摘要：

  A series of wolframite-type oxides (Co1-xNixWO4) with various compositions was prepared by urea-matrix combustion method and subsequently carburized using a temperature-programmed reaction (I degrees C min(-1)) under a mixture of 10 vol.% C2H6/H-2, from room temperature to 700 degrees C, to obtain a mixed Co, Ni and W carbide catalysts. The catalytic performance was evaluated in a continuous flow reactor using hydrodenitrogenation of pyridine as model reaction. The wolframite-type oxides and the carbide catalysts pre- and post-HDN reaction were characterized using elemental analysis, X-ray diffraction (XRD), laser Raman spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetric (DSC), transmission electron microscopy (TEM) and BET surface area measurements. Urea-matrix combustion method is a convenient tool to prepare highly pure wolframite-type oxides, whose composition affects strongly the W-based carbide phase distribution and the HDN catalytic behaviour. At Ni compositions lower than Co contents the formation of Co3W3C and beta-W2C carbides is favoured, whereas at Ni compositions greater than those of Co the main phases were Ni and alpha-WC. At intermediate composition (CO0.5Ni0.5WCx) bimetallic and monometallic carbides were formed. The CoWCx bimetallic catalyst showed greater activity in the steady state than Ni-containing catalysts. The HDN active phase present in CoWCx is different than that present in the Ni-containing catalysts, that is, carbon-metal bond strength of the bimetallic carbide, for the former, and metal nickel or weak Ni-C bond, for the latter, play a very important role in the catalytic process. (c) 2005 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.molcata.2005.05.012