title: The Catalytic Purification of CO-Rich Air.
abstract: Stable heterogeneous catalysts for the oxidative removal of CO from air at ambient temperatures have been developed. An alumina support impregnated with PdCl2, CuCl2, and CuSO4is described. Optimal activity was obtained with Pd 0.020 mol/kg, Cu 0.50 mol/kg, CuCl220-30% of total Cu, a 2- to 24-hr soak, filtration of surplus raffinate, and a 2- to 4-hr firing in air at 200-350 °C. The catalysts are effective at 20-26 °C and relative humidities in the 15-90% range. They are reversibly deactivated by completely dry or water-saturated air streams. These catalysts have been tested at space velocities up to 30,000 hr-1. In contact with <100 ppm CO, they are highly efficient, removing ~99% of the CO with contact times of ~120 msec (pseudo-first order k' > 25 sec-1). At much higher CO concentrations, the maximum CO loading rate-limited by the Cu(I) reoxidation rate-is approximately 17 m mol CO per Limol Pd per hour.
authors.affiliation: a Engineering Services , Bowling Green , Kentucky , USA.
authors.forename: Donald R
authors.initials: DR
authors.lastname: Rowe
authors.affiliation: b Department of Chemistry , Western Kentucky University , Bowling Green , Kentucky , USA.
authors.forename: William G
authors.initials: WG
authors.lastname: Lloyd