Carbon monoxide room-temperature catalytic oxidation catalyst and preparation method thereof

Abstract

The invention provides a carbon monoxide room-temperature catalytic oxidation catalyst and a preparation method thereof. The catalyst comprises the following components in percentage by mass: 2-3% of palladium chloride, 2-3% of copper chloride and the balance of carrier, wherein the carrier is cerium oxide or titanium oxide. The catalyst is prepared through an impregnation method. The preparation method comprises the following steps: dissolving the palladium chloride and the copper chloride in excessive ammonia water, wherein the mass concentration of the palladium chloride is 0.015-0.030 g / mL, the mass concentration of the copper chloride is 0.2-0.4 g / mL, the concentration of the ammonia water solution is 20-25%, and the volume of the ammonia water solution is 5 mL; enabling the carrier to carry the palladium chloride and copper chloride solution through the impregnation method, wherein the mass percent of the copper chloride is 2-3%, and the mass percent of the palladium chloride is 2-3%; and naturally drying the prepared catalyst at 25-35 DEG C, and then roasting at 300 DEG C for 4 hours. Through the interaction between the active components and the carrier, the room-temperature catalytic oxidation of carbon monoxide can be realized, and favorable stability can be achieved. The method has the characteristics of simple preparation process, high catalytic oxidation efficiency and the like.

Description

technical field [0001] The present invention relates to a carbon monoxide catalyst and its preparation method, in particular to a carbon monoxide catalytic oxidation catalyst at room temperature and its preparation method. sensors etc. Background technique [0002] The development of catalytic oxidation catalysts for carbon monoxide at room temperature has strong practical application value in environmental protection, fuel cells and elimination of low-concentration carbon monoxide emitted by motor vehicles in semi-enclosed spaces. It has huge market value while effectively improving air quality, and can be directly applied to actual places such as urban underground tunnels and parking lots. Therefore, it is not only of great academic value but also of great application value to explore highly efficient nano-catalytic materials for the catalytic oxidation of carbon monoxide at room temperature. [0003] Represented by Hopcalite catalysts with CuO-MnOx composite oxide as th...

AI Technical Summary

Problems solved by technology

It has been reported that palladium chloride-copper chloride catalyst is very poor to trace (less than 100ppm) carbon monoxide elimination ability, and carbon monoxide elimination is difficult to reach 100% at low temperature or room temperature (K. D. Kim, J. S. Lee, Appl. Catal. B : 1994, 5, 103; E. D. Park, J. S. Lee, Stud. Surf. Sci. Catal., 2000, 130, 2309)