Cerium,manganese and cerium/manganese ceramic monolithic catalysts.Study of VOCs and PM removal  

作　　者：COLMAN-LERNER Esteban PELUSO Miguel Andres SAMBETH Jorge THOMAS Horacio 

机构地区：[1]Centro de Investigacion y Desarrollo en Ciencias Aplicadas"Dr.Jorge J.Ronco"CONICET CCT La Plata,UNLP,47 N0 257(1900)La Plata,Argentina [2]Fac.de Ciencias Exactas,UNLP,47 and 115(1900)La Plata,Argentina [3]Centro de Investigaciones del Medio Ambiente(CIMA).Facultad de Ciencias Exactas,UNLP.47y 115.1900-La Plata [4]Planta Piloto Multiproposito PLAPIMU,CICPBA-UNLP,C.Centenario and 506,M B.Gonnet,Argentina

出　　处：《Journal of Rare Earths》2016年第7期675-682,共8页稀土学报（英文版）

基　　金：Project supported by National Scientific and Technical Research Council of Argentina(PIP 942);National Science and Technology Promotion Agency of Argentina(PICT 2012-2366)

摘　　要：Ceramic supported cerium, manganese and cerium-manganese catalysts were prepared by direct impregnation of aq precursor, and characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Brunauer-Emmett-Teller rn （BET）, temperature programmed reduction （Ha-TPR）, X-ray photoelectron spectroscopy （XPS） acidity measurements and elec conductivity. The catalytic activity was evaluated for volatile organic compounds （VOC） （ethanol, methyl ethyl ketone and tol oxidation. Additionally, catalysts were tested in particulate matter （PM） combustion. The characterization results indicated that Ce was in the form of Ce4＋ and Ce3＋, and Mn existed in the form of Mn4＋ and Mn3＋ on the surface of the Mn/AC sample and in the of Mn4＋ in the Ce/Mn/AC monolith. VOC oxidation results revealed that the Ce/Mn/AC sample showed an excellent perforr compared with ceramic supported CeO2 （Ce/AC） and MnO, （Mn/AC） samples. The PM combustion was also higher on Ce/M monoliths. The enhanced catalytic activity was mainly attributed to the Ce and Mn interaction which enhanced the acidity, cond ity and the reducibility of the oxides.Ceramic supported cerium, manganese and cerium-manganese catalysts were prepared by direct impregnation of aq precursor, and characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Brunauer-Emmett-Teller rn （BET）, temperature programmed reduction （Ha-TPR）, X-ray photoelectron spectroscopy （XPS） acidity measurements and elec conductivity. The catalytic activity was evaluated for volatile organic compounds （VOC） （ethanol, methyl ethyl ketone and tol oxidation. Additionally, catalysts were tested in particulate matter （PM） combustion. The characterization results indicated that Ce was in the form of Ce4＋ and Ce3＋, and Mn existed in the form of Mn4＋ and Mn3＋ on the surface of the Mn/AC sample and in the of Mn4＋ in the Ce/Mn/AC monolith. VOC oxidation results revealed that the Ce/Mn/AC sample showed an excellent perforr compared with ceramic supported CeO2 （Ce/AC） and MnO, （Mn/AC） samples. The PM combustion was also higher on Ce/M monoliths. The enhanced catalytic activity was mainly attributed to the Ce and Mn interaction which enhanced the acidity, cond ity and the reducibility of the oxides.

关 键 词：MONOLITH VOCS MNOX Ce PM clays rare earths 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学]