title: Suppressed N2O formation during NH3 selective catalytic reduction using vanadium on zeolitic microporous TiO2.
abstract: Emission of N2O from mobile and off-road engine is now being currently regulated because of its high impact compared to that of CO2, thereby implying that N2O formation from the exhaust gas after-treatment system should be suppressed. Selective catalytic reduction using vanadium supported TiO2 catalyst in mobile and off-road engine has been considered to be major source for N2O emission in the system. Here we have demonstrated that vanadium catalyst supported on zeolitic microporous TiO2 obtained from the hydrothermal reaction of bulk TiO2 at 400 K in the presence of LiOH suppresses significantly the N2O emission compared to conventional VOx/TiO2 catalyst, while maintaining the excellent NOx reduction, which was ascribed to the location of VOx domain in the micropore of TiO2, resulting in the strong metal support interaction. The use of zeolitic microporous TiO2 provides a new way of preparing SCR catalyst with a high thermal stability and superior catalytic performance. It can be also extended further to the other catalytic system employing TiO2-based substrate.
authors.affiliation: Department of Applied Chemical Engineering, Chonnam National University, Yongbong 300, Buk-gu, Kwangju, 500-757, Korea.
authors.forename: Seung Gwan
authors.initials: SG
authors.lastname: Lee
authors.affiliation: Department of Applied Chemical Engineering, Chonnam National University, Yongbong 300, Buk-gu, Kwangju, 500-757, Korea.
authors.forename: Hyun Jeong
authors.initials: HJ
authors.lastname: Lee
authors.affiliation: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea.
authors.forename: Inhak
authors.initials: I
authors.lastname: Song
authors.affiliation: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea.
authors.forename: Seunghee
authors.initials: S
authors.lastname: Youn
authors.affiliation: School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 151-744, Korea.
authors.forename: Do Heui
authors.initials: DH
authors.lastname: Kim
authors.affiliation: Department of Applied Chemical Engineering, Chonnam National University, Yongbong 300, Buk-gu, Kwangju, 500-757, Korea.
authors.forename: Sung June
authors.initials: SJ
authors.lastname: Cho