摘要
将质量分数为10%的Co负载在Ce0 2Zr0 4Mn0 4O2(OSM),YSZ Al2O3(Y2O3,ZrO2稳定的γ Al2O3),OSM+YSZ Al2O3(1:1)上,制得Co/OSM,Co/YSZ Al2O3,Co/YSZ Al2O3+OSM(1:1)整体式催化剂。利用XRD和H2 TPR对上述催化剂进行了表征,并研究了催化剂的甲烷催化燃烧性能。XRD结果表明,在OSM和YSZ Al2O3上Co均以高分散形式存在。H2 TPR结果表明Co/YSZ Al2O3+OSM样品的可还原性大于Co/OSM和Co/YSZ Al2O3。不同载体催化剂甲烷燃烧催化活性有如下顺序:Co/YSZ Al2O3<Co/OSM<Co/YSZ Al2O3+OSM;负载催化剂中Co的质量分数为10%时,甲烷催化燃烧活性最佳。
A series of cobalt-based catalysts with different supports have been prepared using impregnation method, and characterized by XRD and H_2-TPR. The catalytic activities for methane combustion were assessed in a micro-reactor. XRD revealed that cobalt was high dispersed on different supports. H_2-TPR revealed that higher the content of OSM in support,higher the reduction of catalysts. YSZ-Al_2O_3 +OSM supported cobalt monolith catalyst was found to have the highest activity amongst Ce_(0.2)Zr_(0.4)Mn_(0.4)O_2 (OSM), YSZ-Al_2O_3 (Y_2O_3, ZrO_2 stabilized alumina) or YSZ-Al_2O_3 +OSM supported catalysts. The methane combustion activity of the YSZ-Al_2O_3 +OSM supported cobalt catalyst was first increased, passed through a maximum and then decreased with increasing the content of cobalt from 1wt% to 20wt%, and the highest activity was observed for the catalyst with 10wt% of cobalt?
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2004年第3期19-22,共4页
Natural Gas Chemical Industry
基金
国家重点基础研究规划项目 (G1 9990 2 2 40 0 )
国家自然科学基金项目 (2 0 2 73 0 43 )
关键词
整体式催化剂
氧化钴
储氧材料
甲烷催化燃烧
monolith catalyst
cobalt oxide
oxygen storage materials (OSM)
catalytic combustion
methane
