title: Noble metal catalysts for methane removal.
abstract: Using a bench-scale rig, the activities of Pt, Pd and Pt+Pd catalysts supported on gamma-Al(2)O(3) and on TiO(2) (anatase) for the complete oxidation of methane (300 ppmv) in air have been measured as a function of temperature; values of T(10), T(50) and T(90) together with the Arrhenius parameters (activation energy and pre-exponential factor) are reported. Pt is less active than Pd when deposited on the surface of the TiO(2), but more active when deposited on gamma-Al(2)O(3), however when combined, the Pt+Pd mixture is more active than either metal individually. The T(10) for Pt+Pd/gamma-Al(2)O(3) was being as low as 228 degrees C. The significance of the Arrhenius parameters, for metal containing catalysts is that they exhibit compensation with increasing activation energy, while securing a more rapid increase in conversion from 0% to 100% when the temperature is increased.
authors.affiliation: The London College, University College Kensington, Victoria Gardens, W11 3PE, London, UK.
authors.forename: Alan
authors.initials: A
authors.lastname: Janbey
authors.forename: Wayne
authors.initials: W
authors.lastname: Clark
authors.forename: Ehsan
authors.initials: E
authors.lastname: Noordally
authors.forename: Sue
authors.initials: S
authors.lastname: Grimes
authors.forename: Saad
authors.initials: S
authors.lastname: Tahir
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002384:Catalysis; D007700:Kinetics; D008697:Methane / Q000737:chemistry* / Q000302:isolation & purification; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D010984:Platinum / Q000737:chemistry*; D013696:Temperature; D013816:Thermodynamics; D014025:Titanium / Q000737:chemistry
chemical_list: C009495:titanium dioxide; D010984:Platinum; D010165:Palladium; D014025:Titanium; D000537:Aluminum Oxide; D008697:Methane