介孔Co_3O_4/Al_2O_3催化氧化甲醛的性能研究
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摘要
采用溶胶-凝胶法制备了介孔Al_2O_3载体,采用浸渍法制备了系列介孔Co_3O_4/Al_2O_3催化剂,考察了活性组分Co_3O_4的质量百分含量(2%、8%、16%和32%)对催化氧化甲醛性能的影响。研究表明,当Co_3O_4的质量百分含量为16%时,介孔催化剂16%Co_3O_4/Al_2O_3对甲醛的完全氧化反应具有最佳的催化活性,在80℃可将甲醛完全氧化。BET和H_2-TPR表征揭示,催化剂的比表面积和孔容,促进了催化剂中Co_3O_4的高度分散;催化剂拥有低温还原能力,可以提高催化剂催化氧化甲醛的性能。
A series of mesoporous Co_3 O_4/Al_2 O_3 catalysts with different loading amounts of Co_3 O_4 were synthesized and used for catalytic oxidation of formaldehyde(HCHO). Techniques such as BET and H_2-TPR were used to characterize the catalysts. The results of catalytic performance tests showed that the mesoporous Co_3 O_4/Al_2 O_3 with the loading amount of 16% exhibited the best performance, the temperature of complete oxidation of HCHO was 80 oC. The analytical results indicated that the larger specific area and easier reducibility served as essential roles in the catalytic removal of HCHO for Co_3 O_4/Al_2 O_3 catalyst.
A series of mesoporous Co_3 O_4/Al_2 O_3 catalysts with different loading amounts of Co_3 O_4 were synthesized and used for catalytic oxidation of formaldehyde(HCHO). Techniques such as BET and H_2-TPR were used to characterize the catalysts. The results of catalytic performance tests showed that the mesoporous Co_3 O_4/Al_2 O_3 with the loading amount of 16% exhibited the best performance, the temperature of complete oxidation of HCHO was 80 oC. The analytical results indicated that the larger specific area and easier reducibility served as essential roles in the catalytic removal of HCHO for Co_3 O_4/Al_2 O_3 catalyst.
引文
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[3]孙权,李飞,张勇,等.室内甲醛污染控制技术研究进展[J].工业催化,2012,20(10):1-7.
[4]张增风,丁慧贤.低温等离子体-催化脱除室内VOC中的甲醛[J].黑龙江科技学院学报,2004,14(1):5-17.
[5]Bai B Y,Qiao Q,Li J H,et al.Progress in reserach on catalysts for catalytic oxidation of formaldehyde[J].Chinese Journal of catalysis,2016,37(1):102-122.
[6]王轶男,方涛,周志强,等.Graphene、CNTs协同Ti O2/ACF光催化净化甲醛研究[J].化工与黏合,2012,35(4):13-15.
[7]赵艳磊,田华,贺军辉,等.催化氧化去除室内气态化学污染物的研究进展[J].化学通报,2014,77(9):832-838.
[8]Wang J L,Li J G,Jiang C J.The effect of manganese vacancy in birnessite-type Mn O2 on room-temperature oxidation of formaldehyde in air[J].Applied catalysis B:Environmental,2017,204:147-155.
[9]Yang T F,Huo Y,Liu Y,et al.Efficient formaldehyde oxidation over nickel hydroxide promoted Pt/γ-Al2O3 with a low Pt content[J].Applied Catalysis B:Environmental,2017,200:543-551.
[10]Zhang C,He H.A comparative study of Ti O2 supported noble metal catalysts for the oxidation of formaldehyde at room temperature[J].Catalysis Today,2007(3-4),126:345-50.
[11]Li H f,Zhang N.High surface area Au/Ce O2 catalysts for low temperature formaldehyde oxidation[J].Applied catalysis B:Environmental,2011,110:279-285.
[12]Sang J P,Inkwon B,In-Sik N,et al.Oxidation of formal-dehyde over Pd/Beta catalyst[J].Chemical Engineering Journal,2012,195/196:392-402.
[13]Qu Z P,Shen S J,Chen D,et al.Highly active Ag/SBA-15 catalyst using post-grafting method for formaldehyde oxidation[J].Journal of Molecular Catalysis A:Chemical,2012,356:171-177.
[14]李玮,黄丽丽,翟友存,等.新型Cu-Mn/Ti O2和Cu-Mn/γ-Al2O3甲醛催化氧化催化剂的研制及活性[J].化工进展,2015,34(1):127-132.
[15]Zhou J,Qin L F,Xiao W,et al.Oriented growth of layered-Mn O2nanosheets overα-Mn O2 nanotubes for enhanced room-temperature HCHO oxidation[J].Applied Catalysis B:Environmental,2017,207:233-243.
[16]Bai B Y,Arandiyan H,Li J H.Comparison of the performance for oxidation of formaldehyde on nano-Co3O4,2D-Co3O4,and3D-Co3O4 catalysts[J].Applied Catalysis B:Environmental,2013,142-143:677-683.
[17]IUPAC manual of symbols and terminology[J].Pure and Applied Chemistry,1972,31:578-638.
[18]Carvalho F L S,Asencios Y J O,Bellido J D A,et al.Bio-ethanol steam reforming for hydrogen production over Co3O4/Ce O2catalysts synthesized by one-step polymerization method[J].Fuel Processing Technology,2016,142:182-191.