CO low temperature oxidation catalyst and its preparation process

Abstract

The low-temperature oxidation catalyst with Co3O4 as constituent for carbon monoxide is prepared by: by cobalt inorganic salt as predecessor and weak base as precipitant and liquid-phase deposition or homogeneous precipitation method, controlling pH value as 6-10, reacting for 1-5h at 25-80Deg; filtering, cleaning, drying, and calcining. The product has high catalytic activity and stability, and fit to wide applying range as -78-100Deg, air speed 2500-20000h-1, and CO content 0.25-2.0%. This method is simple and low cost.

Description

technical field

[0001] The invention relates to a catalyst for catalyzing the oxidation of carbon monoxide, in particular to a low-temperature oxidation catalyst for carbon monoxide suitable for the range of -78-100°C and a preparation method thereof. Background technique

[0002] The low-temperature catalytic oxidation of carbon monoxide (CO) has attracted much attention because of its important practical value in many aspects, such as filter self-rescuer and fire-fighting self-rescue respirator for underground mines, elimination of environmental pollution, reduction of tobacco damage, air purifiers, closed Formula CO 2 Lasers, fuel cells, CO gas sensors, and CO elimination in closed systems.

[0003] At present, there are three main types of catalysts used for CO catalytic oxidation: noble metal type, perovskite type oxide and non-noble metal oxide type.

[0004] Supported noble metal (Pt, Pd, etc.) catalysts are widely used in the catalytic oxidation of CO. Pt / SnO as d...