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不同载体负载的钴基费-托合成催化剂的还原过程研究
  • 期刊名称：中南民族大学学报(自然科学版)，2007,26(2): 1-6
  • 时间：0
  • 分类：O643.36[理学—物理化学;理学—化学]
  • 作者机构：[1]中南民族大学催化材料科学湖北省暨国家民委-教育部共建重点实验室 中南民族大学催化材料科学湖北省暨国家民委-教育部共建重点实验室 武汉
  • 相关基金：国家自然科学基金重大项目(20590361);; 国家自然科学基金面上项目资助(20473114)
  • 相关项目：F－T合成催化技术中的关键化学问题研究
关键词： 费-托合成, 钴催化剂, 载体, 还原, 原位X-射线衍射, 程序升温还原., Fischer-Tropsch synthesis, cobalt catalyst, support, reduction, in-situ X-ray diffraction, temperature-programmed reduction
中文摘要：

研究了不同载体(SiO2、Al2O3、TiO2)负载的钴基费-托合成催化剂在氢气气氛下的还原行为.采用原位X-射线衍射(in-situ XRD)、氢气程序升温还原(H2-TPR)技术对催化剂的还原过程进行原位表征,考察了催化剂中活性相Co3O4在还原过程中的物相变化和不同载体对Co3O4还原过程的影响.结果表明:不同载体负载的钴基费-托合成催化剂的还原均分为2步进行,2步还原过程为:Co3O4+H2→3CoO+H2O和3CoO+3H2→3Co0+3H2O.不同载体负载的钴基费-托合成催化剂在氢气气氛下的还原性大小顺序为:Co/SiO2>Co/TiO2>Co/Al2O3.

英文摘要：

This paper focused on the study of the reduction process of the supported cobalt Fischer-Tropsch synthesis(FTS) catalysts with different support(SiO2,TiO2,Al2O3).The catalysts were characterized with in-situ Xray diffraction(in-situ XRD),hydrogen temperature-programmed reduction(H2-TPR).It was found that under hydrogen atmosphere the reduction of the supported cobalt FTS catalysts proceeded in two steps as Co3O4+H2→3CoO +H2O,3CoO+3H2→3Co0+3H2O.The reducibility of the supported cobalt FTS catalysts was found...

同期刊论文项目
钴基费-托合成催化剂失活机理及费-托合成产物分布规律的同位素
期刊论文 21 会议论文 3 获奖 2
F－T合成催化技术中的关键化学问题研究
期刊论文 146 获奖 6
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