催化学报 ›› 2009, Vol. 30 ›› Issue (6): 549-554.

• 研究论文 • 上一篇    下一篇

载体焙烧温度对 Co-Mo/MgO-Al2O3 变换催化剂性能的影响

连奕新, 王会芳, 方维平, 杨意泉   

  1. 厦门大学化学化工学院化学系, 醇醚酯清洁生产国家工程实验室, 福建厦门 361005
  • 收稿日期:2009-06-25 出版日期:2009-06-25 发布日期:2013-03-22

Effect of Calcination Temperature of Support on the Performance of o-Mo/MgO-Al2O3 Water-Gas Shift Catalyst

LIAN Yixin, WANG Huifang, FANG Weiping, YANG Yiquan*   

  1. National Engineering Laboratory for Green Chemical Productions of Alcohols, Ethers and Esters, Department of Chemistry, ollege of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
  • Received:2009-06-25 Online:2009-06-25 Published:2013-03-22

摘要: 通过 X 射线衍射、N2 吸附-脱附、程序升温脱附、程序升温还原和电子顺磁共振方法研究了焙烧温度对 MgO-Al2O3 载体物化结构和 Co-Mo/MgO-Al2O3 变换催化剂性能的影响. 结果表明, 在 600~800 ºC范围内焙烧的复合氧化物以 MgAl2O4- xMgO-yAl2O3 无定形形式存在, 载体表面存在较多的中强酸-碱位, 相应的负载催化剂具有较高的水煤气变换活性. 在氧化态催化剂中存在较多八面体结构的 Mo 物种, 而硫化态催化剂中含有较多氧硫包围的 Mo 物种. 这些钼物种与催化剂的活性紧密相关.

关键词: 氧化镁, 氧化铝, 尖晶石, 钴钼基催化剂, 水煤气变换

Abstract: Co-Mo-based catalysts with MgO-Al2O3 mixed oxide supports calcined at 600–800 oC exhibit high activity for water-gas shift reaction. The catalytic activity was closely related to the specific surface area, acid-base properties, and Mo species on the support surface.

Key words: magnesia, alumina, spinel, cobalt-molybdenum-based catalyst, water gas shift