摘要
分别以NH3·H2O和(NH4)2CO3溶液或两者的混合溶液为沉淀剂制备了Ce0.9Fe0.1O2催化剂,采用X射线衍射、N2吸附-脱附和氢程序升温还原等方法对Ce0.9Fe0.1O2催化剂进行了表征,并考察了Ce0.9Fe0.1O2催化剂对甲烷催化燃烧反应的催化活性。实验结果表明,不同沉淀剂对Ce0.9Fe0.1O2催化剂的甲烷催化燃烧活性、表面性能和还原能力等均有显著影响。以(NH4)2CO3与NH3·H2O的混合溶液为沉淀剂制备的Ce0.9Fe0.1O2催化剂具有较大的比表面积和孔径、较小的粒径和较好的甲烷催化燃烧活性,甲烷的起燃温度和完全转化温度分别为397℃和543℃。催化剂的活性与其比表面积密切相关。
A series of Ce0.9Fe0.1O2 catalysts were prepared with different precipitants, namely NH3 · H2O, （NH4 ）2CO3 and their mixture. The catalysts were characterized by means of XRD, N2 adsorption- desorption and HE -TPR. Activity of Ce0.9Fe0.1O2 catalyst in catalytic combustion of methane was investigated. Type of precipitant obviously affects activity, surface characteristic and reduction properties of the catalysts. Catalyst prepared with mixture of NH3 · H2O and （NH4）2CO3 as precipitant has high specific surface area, large pore diameter, small particle size and high activity for catalytic combustion of methane. T10 （temperature at 10% methane conversion） and T90 （temperature at 90% methane conversion） of the catalyst are 397 ℃ and 543 ℃, respectively. The activity is closely related with BET specific surface area.
出处
《石油化工》
EI
CAS
CSCD
北大核心
2007年第2期127-131,共5页
Petrochemical Technology
基金
高等学校博士学科点专项研究基金项目(20040403001)
江西教育厅科研基金项目(2005035)
南昌大学分析测试基金资助项目(200506)
关键词
沉淀剂
氨水
碳酸铵
铈-铁-氧催化剂
甲烷
催化燃烧
precipitator
ammonia
ammonium carbonate
ceria - iron oxide catalyst
methane
catalytic combustion
