La-Ni/γ-Al_2O_3对二氧化碳加氢甲烷化的催化活性研究
|
摘要
用浸渍法制备了La-Ni/γ-Al_2O_3催化剂,并采用比表面积(BET)测试、程序升温还原(H2-TPR)等表征手段及热稳定性实验等,研究了催化剂的结构及活性。结果表明,2%的La显著提高了Ni/γ-Al_2O_3的活性并使其比表面积增加,La-Ni/γ-Al_2O_3在反应前的最佳还原活化温度为450℃,最佳反应温度和反应压力分别为450℃、015MPa,且在72h连续反应过程中,甲烷选择性和二氧化碳的转化率都能保持在一个较高的水平。
La-Ni/γ-Al_2O_3 was prepared by impregnation method, and catalytic construction and activities for methanation of carbon dioxide were studied by BET, H2-TPR, experiment of thermal stability, and so on. The result showed that the activity and specific surface area of La-Ni/γ-Al_2O_3 was improved by additive of 2% La. The optimum reduction activation temperature of catalyst was 450℃, and the optimum reaction temperature and pressure were 450℃, 015 MPa, respectively. After 72 h of continuous reaction, the selectivity of methane and the conversion of carbon dioxide remained at a high level.
La-Ni/γ-Al_2O_3 was prepared by impregnation method, and catalytic construction and activities for methanation of carbon dioxide were studied by BET, H2-TPR, experiment of thermal stability, and so on. The result showed that the activity and specific surface area of La-Ni/γ-Al_2O_3 was improved by additive of 2% La. The optimum reduction activation temperature of catalyst was 450℃, and the optimum reaction temperature and pressure were 450℃, 015 MPa, respectively. After 72 h of continuous reaction, the selectivity of methane and the conversion of carbon dioxide remained at a high level.
引文
[1]赵云鹏,蔡宇翾,郑永杰,等.二氧化碳加氢直接合成二甲醚催化剂的研究进展[J].应用化工,2017(2):373-377.
[2]Karelovic A,Ruiz P.CO2 hydrogenation at low temperature over Rh/γ-Al2O3 catalysts:Effect of the metal particle size on catalytic performances and reaction mechanism[J].Applied Catalysis B Environmental,2012,s 113/114:237-249.
[3]Cai M,Wen J,Chu W,et al.Methanation of carbon dioxide on Ni/Zr O-Al O catalysts:Effects of Zr O promoter and preparation method of novel Zr O-Al O carrier[J].Journal of Natural Gas Chemistry,2011,20(3):318-324.
[4]周龙,马丽萍,陈建涛,等.Ni/γ-Al2O3对二氧化碳加氢甲烷化的催化活性研究[J].化学世界,2015,56(1):16-21.
[5]聂望欣,邹秀晶,汪学广,等.介孔γ-Al2O3负载的高分散Ni-Ce-Zr氧化物的制备及其二氧化碳甲烷化研究[J].物理化学学报,2016,32(11):2803-2810.
[6]高建国,丁剑秋,杨芳芳,等.二氧化碳催化加氢甲烷化研究进展[J].贵州化工,2009,34(3):23-25.
[7]靳永勇.碳化硅负载镍基催化剂高温甲烷化性能研究[D].太原:太原理工大学,2017.
[8]张荣斌,仝塞,杨金美,等.石墨烯负载镍催化CO2加氢甲烷化[J].高等学校化学学报,2017,38(12):2255-2261.
[9]周郁文.Co基催化剂的制备、改性及其催化CO2甲烷化的研究[D].南宁:广西大学,2017.
[10]Long Z,Wang Q,Ma L,et al.Ce O2 Promoted Mesoporous Ni/γ-Al2O3 Catalyst and its Reaction Conditions For CO2Methanation[J].Catalysis Letters,2015,145(2):612-619.
[11]张黎峰,林俊藩.氧化镍(Ni O)与γ-Al2O3载体间的相互作用[J].无机化学学报,1991(1):122-127.
[2]Karelovic A,Ruiz P.CO2 hydrogenation at low temperature over Rh/γ-Al2O3 catalysts:Effect of the metal particle size on catalytic performances and reaction mechanism[J].Applied Catalysis B Environmental,2012,s 113/114:237-249.
[3]Cai M,Wen J,Chu W,et al.Methanation of carbon dioxide on Ni/Zr O-Al O catalysts:Effects of Zr O promoter and preparation method of novel Zr O-Al O carrier[J].Journal of Natural Gas Chemistry,2011,20(3):318-324.
[4]周龙,马丽萍,陈建涛,等.Ni/γ-Al2O3对二氧化碳加氢甲烷化的催化活性研究[J].化学世界,2015,56(1):16-21.
[5]聂望欣,邹秀晶,汪学广,等.介孔γ-Al2O3负载的高分散Ni-Ce-Zr氧化物的制备及其二氧化碳甲烷化研究[J].物理化学学报,2016,32(11):2803-2810.
[6]高建国,丁剑秋,杨芳芳,等.二氧化碳催化加氢甲烷化研究进展[J].贵州化工,2009,34(3):23-25.
[7]靳永勇.碳化硅负载镍基催化剂高温甲烷化性能研究[D].太原:太原理工大学,2017.
[8]张荣斌,仝塞,杨金美,等.石墨烯负载镍催化CO2加氢甲烷化[J].高等学校化学学报,2017,38(12):2255-2261.
[9]周郁文.Co基催化剂的制备、改性及其催化CO2甲烷化的研究[D].南宁:广西大学,2017.
[10]Long Z,Wang Q,Ma L,et al.Ce O2 Promoted Mesoporous Ni/γ-Al2O3 Catalyst and its Reaction Conditions For CO2Methanation[J].Catalysis Letters,2015,145(2):612-619.
[11]张黎峰,林俊藩.氧化镍(Ni O)与γ-Al2O3载体间的相互作用[J].无机化学学报,1991(1):122-127.