CO_2/CH_4重整镍基碳纤维催化剂的制备与性能研究  

CO_2 Reforming of CH_4 over Ni Based Carbon Fiber

作　　者：卫月星 宋敏[1] 毛瑞鑫[1] 刘洋[1] 徐玉叶[1] 于磊[1] Wei Yuexing;Song Min;Mao Ruixin;Liu Yang;Xu Yuye;Yu Lei(Key Laboratory of Ministry of Education for Energy Thermal Conversion and Control,Southeast University,Nanjing 210096,China)

机构地区：[1]东南大学能源热转换及其过程测控教育部重点实验室,南京210096

出　　处：《燃烧科学与技术》2018年第1期54-58,共5页Journal of Combustion Science and Technology

基　　金：国家自然科学基金资助项目(51576048)

摘　　要：为研制高性能的甲烷二氧化碳重整催化剂,采用静电纺丝法制备了镍基原纤维经预氧化、炭化后的原位镍基碳纤维催化剂和浸渍法制备的浸渍镍基碳纤维催化剂.通过SEM、H_2-TPR、重整反应分析了两种制备方法下催化剂结构及性能的变化,结果表明,原位镍基碳纤维催化剂较浸渍法所得催化剂保持了更好的纤维结构及金属分散性.并且,原位碳纤维的镍含量只有浸渍碳纤维的5%,,当温度大于900,℃以后,其转化率明显高于浸渍镍基碳纤维.在850,℃进行两种催化剂的寿命评价得出的结果显示,浸渍法所得镍基碳纤维催化剂在50,min内表现出失活,而原位法所得镍基碳纤维催化剂在200,min时仍然保持活性.For the development of high performance catalysts of carbon dioxide reforming of methane,two different ways were used to prepare Ni/CF catalyst,one is 1%,Ni/CF obtained from electrostatic spinning and the other is 20%,Ni/CF obtained by impregnation method.The prepared samples were characterized by scanning electron microscopy(SEM)and temperature programmed reduction(TPR)techniques.The obtained results showed that in-situ nickel based carbon fiber catalyst has better fiber structure,metal dispersion and anti-sintering than impregnated nickel based carbon fiber catalyst.In addition,compared with impregnated(20%,)nickel based carbon fiber,the in-situ nickel based carbon fiber containing 1%nickel shows excellent performance in carbon dioxide reforming of methane.Furthermore,when the temperature reaches to 900℃,the methane conversion rate is obviously higher than that of the impregnated nickel based carbon fiber.Finally,the lifetime tests of two catalysts were evaluated at 850℃.It is observed that the impregnated(20%)nickel based carbon fiber deactivated in 50 min,while the in-situ nickel based carbon fiber catalyst remained active in 200 min.

关 键 词：甲烷/二氧化碳重整 催化剂 碳纤维 静电纺丝 

分 类 号：TK09[动力工程及工程热物理]