title: Low-temperature selective catalytic reduction of NO with propylene in excess oxygen over the Pt/ZSM-5 catalyst.
abstract: A 0.5 wt% Pt/ZSM-5 catalyst was used for the low-temperature selective catalytic reduction (SCR) of NO with C(3)H(6) in the presence of excess oxygen. Under an atmosphere of 150 ppm NO, 150 ppm C(3)H(6) and 18 vol% O(2) (GHSV 72,000 h(-1)), Pt/ZSM-5 showed remarkably high catalytic performance giving 77.1% NO reduction to N(2) + N(2)O and 79.7% C(3)H(6) conversion to CO(2) simultaneously at 140 °C. The samples were characterized by means of NO temperature programmed desorption (TPD), NO/C(3)H(6) temperature programmed oxidation (TPO), BET surface area, XRD and TEM. The catalytic activities of C(3)H(6) combustion and NO oxidation are improved by well-dispersed platinum significantly. It is found that the enhanced activity of Pt/ZSM-5 for the low-temperature SCR is associated with its outstanding activities in the TPO processes of NO to NO(2) and C(3)H(6) to CO(2) in low temperature range.
authors.affiliation: Research Center for Combustion and Environmental Technology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, PR China.
authors.forename: Zhixiang
authors.initials: Z
authors.lastname: Zhang
authors.forename: Mingxia
authors.initials: M
authors.lastname: Chen
authors.forename: Zhi
authors.initials: Z
authors.lastname: Jiang
authors.forename: Wenfeng
authors.initials: W
authors.lastname: Shangguan
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D046529:Microscopy, Electron, Transmission; D009569:Nitric Oxide / Q000737:chemistry*; D010100:Oxygen / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D013696:Temperature; D014961:X-Ray Diffraction
chemical_list: D000475:Alkenes; D009569:Nitric Oxide; D010984:Platinum; C013658:propylene; D010100:Oxygen