title: Removal of NO(x) at low temperature over mesoporous alpha-Mn2O3 catalyst.
abstract: Low-temperature selective catalytic reduction was carried out over various kinds of manganese oxide (MnOx) catalysts. Mesoporous alpha-Mn2O3, commercial bulk Mn2O3, and Mn/SBA-15 were used as the catalyst. The NOx removal performances of the catalysts were compared. Three different amounts of Mn (5, 10, and 15 wt%) were impregnated on SBA-15 to synthesize Mn/SBA-15. The physical and chemical properties of the catalysts were examined by Brunauer-Emmett-Teller, X-ray diffraction, X-ray photoelectron spectroscopy, and H2-temperature programmed reduction analyses. Of all catalysts examined, mesoporous alpha-Mn2O3 exhibited the highest low-temperature SCR de-NOx efficiency, reaching about 90% at 175 degrees C. This is attributed to strong reducing ability and high oxygen mobility of mesoporous alpha-Mn2O3 and well dispersed Mn2O3 in its mesoporous framework.
authors.forename: Mi-Jin
authors.initials: MJ
authors.lastname: Jeon
authors.forename: Sung Hoon
authors.initials: SH
authors.lastname: Park
authors.forename: Ji Man
authors.initials: JM
authors.lastname: Kim
authors.forename: Jong-Ki
authors.initials: JK
authors.lastname: Jeon
authors.forename: Sang Chai
authors.initials: SC
authors.lastname: Kim
authors.forename: Do Heui
authors.initials: DH
authors.lastname: Kim
authors.forename: Young-Kwon
authors.initials: YK
authors.lastname: Park
mesh_terms: D002384:Catalysis; D052918:Environmental Restoration and Remediation; D006859:Hydrogen / Q000737:chemistry; D017895:Manganese Compounds / Q000737:chemistry*; D009584:Nitrogen / Q000737:chemistry*; D009589:Nitrogen Oxides / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry; D013696:Temperature
chemical_list: D017895:Manganese Compounds; D009589:Nitrogen Oxides; D010087:Oxides; C509969:SBA-15; C027424:manganese oxide; D012822:Silicon Dioxide; D006859:Hydrogen; D009584:Nitrogen