Nano-oxides washcoat for enhanced catalytic oxidation activity toward the perovskite-based monolithic catalyst

被引:0
作者
Chunwang Lv
Hongwei Chen
Mingjiang Hu
Tianchao Ai
Haoka Fu
机构
[1] North China Electric Power University,School of Energy Power and Mechanical Engineering
[2] Henan University of Urban Construction,School of Energy and Building Environmental Engineering
来源
Environmental Science and Pollution Research | 2021年 / 28卷
关键词
Washcoat; Monolithic catalyst; Perovskite; Catalytic oxidation; Nanoparticles; Cordierite;
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暂无
中图分类号
学科分类号
摘要
In order to explore a superior washcoat material to give full play to the catalytic activity of perovskite active components on the monolithic catalysts, three novel types of LaCoO3/washcoat/cordierite monolith catalysts were prepared by a facile two-step procedure which employed the cordierite honeycomb ceramic as the monolith substrate, the nano-oxides (ZrO2, ɤ-Al2O3, TiO2) as the washcoat, and the perovskite of LaCoO3 as the active components. The blank cordierite, powdered LaCoO3, semi-manufactured monolithic catalysts (washcoat/cordierite), and manufactured monolithic catalysts (LaCoO3/washcoat/cordierite) were characterized by XRD, SEM, XPS, N2 adsorption–desorption, H2-TPR, and ultrasonic test, and their catalytic activities and catalytic stability were evaluated by the toluene oxidation test. The research results indicate that the nanoparticles coated on the cordierite substrate as the washcoat can give full play to the catalytic ability of the LaCoO3 active components and also showed high catalytic stability. However, the catalytic properties of the monolithic catalysts vary notably with the species of nano-washcoat. Among all the catalysts, the porous honeycomb surface structure, uniform distribution, high ratio of surface adsorbed oxygen, and strong reducing ability together give the LaCoO3/ZrO2/cordierite monolithic catalyst the highest catalytic activity on the oxidation of toluene at low temperature, which could be attributed to the excellent interactions of perovskite and nano-ZrO2 washcoat. Therefore, the nano-oxides, especially the nano-ZrO2, have a broad practical application potential for toluene oxidation at low temperature as the washcoat of perovskite-based monolithic catalysts.
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页码:37142 / 37157
页数:15
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共 306 条
  • [1] Almohamadi H(2019)Beneficial effect of adding γ-AlOOH to the γ-Al Can J Chem Eng 98 281-293
  • [2] Smith KJ(2013)O Chem Eng J 223 536-546
  • [3] Azalim S(2015) washcoat of a PdO catalyst for methane oxidation Catalysts 5 2271-2286
  • [4] Brahmi R(2016)Washcoating of cordierite honeycomb with Ce–Zr–Mn mixed oxides for VOC catalytic oxidation Atmos Chem Phys 16 11961-11989
  • [5] Agunaou M(2009)Washcoat deposition of Ni- and Co-ZrO Chem Eng J 149 173-182
  • [6] Beaurain A(2014) low surface area powders onto ceramic open-cell foams: influence of slurry formulation and rheology Hydrogen Energy 39 13991-14007
  • [7] Giraudon JM(2010)Seasonal variability and source apportionment of volatile organic compounds (VOCs) in the Paris megacity (France) Atmos Environ 44 5005-5014
  • [8] Lamonier JF(2016)A comparative study of V Environ Sci Pollut Res Int 23 15193-15201
  • [9] Balzarotti R(1981)O J Catal 69 359-370
  • [10] Ciurlia M(2015)/AC and V Sci Bull 60 1708-1710