Abatement of CO from relatively simple and complex mixtures: I. Oxidation on Pd-Ag/zeolite catalysts

• Published in: Applied catalysis. B, Environmental Vol. 45; no. 4; pp. 241 - 255
• Main Author: Dyakonov, Alexander J
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.10.2003
• Subjects: Abatement; Ag trap; Low-temperature catalytic oxidation; Pd-Ag catalyst; Smoke; Pd-Ag catalyst; Abatement; Smoke; Low-temperature catalytic oxidation; CO; Ag trap
• ISSN: 0926-3373; 1873-3883
• DOI: 10.1016/S0926-3373(03)00168-1

Low-temperature abatement of CO from mixtures as complicated as smoke was considered. Adsorptive and catalytic properties of some amorphous (Al2O3) and crystalline (zeolites) catalyst supports, Ag- and Pd-containing catalysts were investigated. Zeolites with an aperture size around 5Å were found capable of adsorbing CO at room temperature. Development of Pd catalysts with Ag as catalyst promoter, supported on zeolite (for a shape-selectivity), proved to be a feasible approach to the smoke application. The mechanisms governing the adsorption and catalysis were studied using non-steady-state oxidation of CO on the Ag catalyst. Distribution and migration of the reaction products in the Pd-containing catalysts and some elements of the mechanism of catalysis are discussed based on the gas-flow and gas-pulse experiments and the literature data.