掺杂Ni制备Ca_2FeCo_(1-x)Ni_xO_6催化剂及其催化甲烷燃烧性能
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摘要
采用共沉淀法制备双钙钛矿Ca_2FeCo_(1-x)Ni_xO_6系列催化剂。采用XRD、BET和H_2-TPR等对样品进行表征,通过催化甲烷燃烧对其进行催化性能测试。结果表明,不同Ni~(2+)掺杂量均可以形成完整的钙钛矿晶型,随着Ni~(2+)掺杂比例升高,催化剂的比表面积逐渐增大;不同Ni~(2+)掺杂量制备的催化剂结构和活性不一样,样品Ca_2FeNiO_6催化甲烷燃烧活性最好,起燃温度T_(10%)为430℃,T_(90%)为640℃。
Ca_2FeCo_(1-x)Ni_xO_6( x = 0,0. 2,0. 4,0. 6,0. 8,1) catalysts were prepared by coprecipitation methods,characterized by XRD,BET,H_2-TPR,and tested in catalytic combustion of methane. The experimental results showed that doping different proportions of Ni~(2+) facilitated the formation of complete perovskite crystal. With the increase of Ni~(2+) doping ratio,specific surface area of the catalyst gradually increased. Structure and activity of the catalyst with different proportions of dopoing Ni~(2+) were different. Ca_2FeNiO_6 catalyst had the best catalytic activity. The light-off temperature T_(10%) was 430 ℃ and T_(90%) was 640 ℃.
Ca_2FeCo_(1-x)Ni_xO_6( x = 0,0. 2,0. 4,0. 6,0. 8,1) catalysts were prepared by coprecipitation methods,characterized by XRD,BET,H_2-TPR,and tested in catalytic combustion of methane. The experimental results showed that doping different proportions of Ni~(2+) facilitated the formation of complete perovskite crystal. With the increase of Ni~(2+) doping ratio,specific surface area of the catalyst gradually increased. Structure and activity of the catalyst with different proportions of dopoing Ni~(2+) were different. Ca_2FeNiO_6 catalyst had the best catalytic activity. The light-off temperature T_(10%) was 430 ℃ and T_(90%) was 640 ℃.
引文
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[2]吴跃辉,罗来涛,刘伟.复合掺杂钙钛矿氧化物催化剂的制备方法[J].石油与天然气化工,2007,36(2):101-105.Wu Yuehui,Luo Laitao,Liu Wei.Preparation method for composite catalyst intermingled with perovskite oxide[J].Chemical Engineering of Oil and Gas,2007,36(2):101-105.
[3]Marchetti L,Fomi L.Catalytic combustion of methane over perovskites[J].Applied catalysis B:Environmental,1998,15(2):179-183.
[4]Kobayashi K I,Kimura T,Sawada H,et al.Room-temperature magnetoresistance in an oxide materialwith an ordered double-perovskite structure[J].Nature,1998,395(6703):677-680.
[5]刘伟.大表面积Co系钙钛矿复合氧化物的制备及催化性能研究[D].南昌:南昌大学,2007.
[6]郑建东,王保华,郎雄峰,等.La Cu1-xMnxO3催化剂的制备及其催化甲烷燃烧研究[J].应用化工,2014,43(1):13-15.Zheng Jiandong,Wang Baohua,Lang Xiongfeng,et al.Substitution La CuO3with Mn2+and investigation on their catalytic activity of methane combustion[J].Applied Chemical Industry,2014,43(1):13-15.
[7]任晓光,郑建东,宋永吉.不同方法制备K2MnAl11O19六铝酸盐催化剂及其甲烷的燃烧活性[J].化工进展,2007,26(9):1319-1322.Ren Xiaoguang,Zheng Jiandong,Song Yongji.Synthesis of K2MnAl11O19catalysts by using different methods and investigation on their catalytic activity of methane combustion[J].Chemical Industry and Engineering Progress,2007,26(9):1319-1322.
[8]Hu Ruisheng,Ding Ranran,Chen Jie et al.Preparation and catalytic activities of the novel double perovskite-type oxide La2Cu Ni O6for methane combustion[J].Catalysis Communications,2012,21:38-41.
[9]胡瑞生,包莫日根高娃,徐娜,等.新型催化材料Sr2FeMoO6的葡萄糖溶胶-凝胶法合成及甲烷催化燃烧性能[J].化工学报,2008,59(6):1418-1424.Hu Ruisheng,Bao Morigengaowa,Xu Na,et al.Preparation of novel catalyst Sr2Fe MoO6and its catalytic performance in methane combustion[J].Journal of Chemical Industry and Engineering(China),2008,59(6):1418-1424.
[10]Germán Sierra Gallego,Fanor Mondragón,Jo3l Barrault,et al.CO2reforming of CH4over La-Ni based perovskite precursors[J].Applied Catalysis A:General,2006,311:164-171.
[11]Saracco G,Geobaldo F,Baldi G.Methane combustion on Mg-doped La MnO3perovskite catalysts[J].Applied Catalysis B:Environmental,1999,20(4):277-279.
[12]白峰.制备方法对双钙钛矿复合氧化物LaSrFeCoO6甲烷催化燃烧性能的影响[D].呼和浩特:内蒙古大学,2009.Bai Feng.Effect of preparation methods on methane catalytic combustion activity of double perovskites La Sr Fe Co O6[D].Hohhot:Inner Mongolia University,2009.
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