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

被引：49
作者：
Colman-Lerner, Esteban [1 ,2 ,3 ]
Peluso, Miguel Andres [1 ,2 ]
Sambeth, Jorge [1 ,2 ]
Thomas, Horacio [1 ,4 ]
机构：
[1] UNLP, Ctr Invest & Desarrollo Ciencias Aplicada Dr Jorg, RA-1900 La Plata, Buenos Aires, Argentina
[2] UNLP, Fac Ciencias Exactas, 47 & 115, RA-1900 La Plata, Buenos Aires, Argentina
[3] UNLP, Fac Ciencias Exactas, Ctr Invest Medio Ambiente, 47 & 115, RA-1900 La Plata, Buenos Aires, Argentina
[4] CICPBA UNLP, Planta Piloto Multiproposito PLAPIMU, C Centenario & 506, Manuel B Gonnet, Argentina
来源：
JOURNAL OF RARE EARTHS | 2016年 / 34卷 / 07期
关键词：
monolith; VOCs; MnOx; Ce; PM; clays; rare earths; TOTAL OXIDATION; CATALYTIC-ACTIVITY; MIXED OXIDES; SURFACE-PROPERTIES; SOOT OXIDATION; CE; MN; COMBUSTION; PERFORMANCE; CO;
D O I：
10.1016/S1002-0721(16)60078-9
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
Ceramic supported cerium, manganese and cerium-manganese catalysts were prepared by direct impregnation of aqueous precursor, and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer-Emmett-Teller method (BET), temperature programmed reduction (H-2-TPR), X-ray photoelectron spectroscopy (XPS) acidity measurements and electrical conductivity. The catalytic activity was evaluated for volatile organic compounds (VOC) (ethanol, methyl ethyl ketone and toluene) 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 form of Mn4+ in the Ce/Mn/AC monolith. VOC oxidation results revealed that the Ce/Mn/AC sample showed an excellent performance compared with ceramic supported CeO2 (Ce/AC) and MnOx (Mn/AC) samples. The PM combustion was also higher on Ce/Mn/AC monoliths. The enhanced catalytic activity was mainly attributed to the Ce and Mn interaction which enhanced the acidity, conductivity and the reducibility of the oxides.
引用
收藏
页码：675 / 682
页数：8
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