一种钴-铜分子筛催化剂的合成及其催化氧化性能
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摘要
采用水热晶化法合成了Co-Cu-SBA-15介孔分子筛,并且用XRD、FTIR、N2吸附-脱附、SEM、TEM对所合成的试样进行了表征。结果表明:Co-Cu-SBA-15介孔分子筛具有高度有序的介孔结构和均一的孔径分布,部分过渡金属离子进入了分子筛骨架。Co-Cu-SBA-15在双氧水为氧化剂的条件下催化乙苯氧化反应,在催化剂用量0.2g、100℃反应8h的优化条件下,乙苯转化率可达32.12%,苯乙酮选择性为89.26%。
Co-Cu-SBA-15 mesoporous molecular sieves were synthesized by hydrothermal crystallization,and the synthesized samples were characterized by XRD,FTIR,N2 adsorption-desorption,SEM and TEM.The results show that Co-Cu-SBA-15 mesoporous molecular sieves have a highly ordered mesoporous structure and a uniform pore size distribution,some transition metal ions enter the molecular sieve framework.Co-Cu/SBA-15 catalyzed the oxidation of ethylbenzene under hydrogen peroxide as oxidant.Under the optimized conditions of catalyst dosage of 0.2 g and reaction at 100℃for 8 h,the conversion of ethylbenzene reached 32.12%and the selectivity of acetophenone was 89.26%.
Co-Cu-SBA-15 mesoporous molecular sieves were synthesized by hydrothermal crystallization,and the synthesized samples were characterized by XRD,FTIR,N2 adsorption-desorption,SEM and TEM.The results show that Co-Cu-SBA-15 mesoporous molecular sieves have a highly ordered mesoporous structure and a uniform pore size distribution,some transition metal ions enter the molecular sieve framework.Co-Cu/SBA-15 catalyzed the oxidation of ethylbenzene under hydrogen peroxide as oxidant.Under the optimized conditions of catalyst dosage of 0.2 g and reaction at 100℃for 8 h,the conversion of ethylbenzene reached 32.12%and the selectivity of acetophenone was 89.26%.
引文
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[5]Mahdavi V,Monajemi A.Statistical optimization for oxidation of ethyl benzene over Co-Mn/SBA-15catalyst by BoxBehnken design[J].Korean Journal of Chemical Engineering,2013,30(12):2178-2185.
[6]章艳,高保娇,王蕊欣.固载MnP-PGMA/SiO2催化剂的制备及其对乙苯氧化反应的催化性能[J].催化学报,2008,32(3):247-252.
[7]Li C,Zhang Q,Wang Y,et al.Preparation,Characterization and Catalytic Activity of Palladium Nanoparticles Encapsulated in SBA-15[J].Catalysis Letters,2008,120(1-2):126-136.
[8]Zhang Lei,Zhao Yanhui,Dai Hongxing,et al.A comparative investigation on the properties of Cr-SBA-15 and CrOx/SBA-15[J].Catalysis Today,2008,131:42-54.
[9]Hong M,Jie X,Chen C,et al.Catalytic aerobic oxidation of ethylbenzene over Co/SBA-15[J].Catalysis Letters,2007,113(3):104-108.
[10]顾晓吴,孙伟振,赵玲,等.乙苯液相过氧化反应的自由基动力学模型研究[J].石油化工,2010,39(4):411-416.
[2]Zhao D Y,Feng J L,Huo Q S,Nicholas M,Fredrickson GH,Chmelka B F,Stueky G D.Science,1998,(279):548-552.
[3]李良,褚宁杰,金红晓,等.FexOy/SBA-15介孔分子筛的合成以及性能研究[J].无机化学学报,2007,37(10):1753-1757.
[4]Martín-Aranda R M,Cejka J.Recent Advances in Catalysis Over Mesoporous Molecular Sieves[J].Topics in Catalysis,2010,53(3-4):141-153.
[5]Mahdavi V,Monajemi A.Statistical optimization for oxidation of ethyl benzene over Co-Mn/SBA-15catalyst by BoxBehnken design[J].Korean Journal of Chemical Engineering,2013,30(12):2178-2185.
[6]章艳,高保娇,王蕊欣.固载MnP-PGMA/SiO2催化剂的制备及其对乙苯氧化反应的催化性能[J].催化学报,2008,32(3):247-252.
[7]Li C,Zhang Q,Wang Y,et al.Preparation,Characterization and Catalytic Activity of Palladium Nanoparticles Encapsulated in SBA-15[J].Catalysis Letters,2008,120(1-2):126-136.
[8]Zhang Lei,Zhao Yanhui,Dai Hongxing,et al.A comparative investigation on the properties of Cr-SBA-15 and CrOx/SBA-15[J].Catalysis Today,2008,131:42-54.
[9]Hong M,Jie X,Chen C,et al.Catalytic aerobic oxidation of ethylbenzene over Co/SBA-15[J].Catalysis Letters,2007,113(3):104-108.
[10]顾晓吴,孙伟振,赵玲,等.乙苯液相过氧化反应的自由基动力学模型研究[J].石油化工,2010,39(4):411-416.