Iridium-containing bimetallic catalyst for methane catalytic combustion and preparation method thereof
A bimetallic catalyst, methane catalytic combustion technology, applied in combustion methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve the problem of poor stability, high cost, and poor hydrothermal stability. and other problems, to achieve good stability, solve poor stability, and promote the effect of dispersion
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Embodiment 1
[0020] An iridium-containing bimetallic catalyst for the catalytic combustion of methane consisting of noble metals Ir, Pt, their oxides and anatase phase TiO 2 Vector composition. (1) Based on the weight of the catalyst as 100%, the weight percentages of Ir and Pt are 0.5% and 0.5% respectively, and the iridium chloride solution and the chloroplatinic acid solution are mixed uniformly to obtain a mixed precursor solution. (2) Using the equal volume impregnation method, impregnate the mixed precursor solution in step (1) into the TiO 2 on the carrier. After drying at 100 ℃ in air atmosphere for 12 h, and then calcining at 500 ℃ in air atmosphere for 2 h with a heating rate of 10 ℃ / min, the methane catalytic combustion catalyst was prepared.
Embodiment 2
[0022] An iridium-containing bimetallic catalyst for the catalytic combustion of methane consisting of noble metals Ir, Pd, their oxides and anatase phase TiO 2 Vector composition. (1) Based on the weight of the catalyst as 100%, the weight percentages of Ir and Pd are 0.3% and 2%, respectively, and the chloroiridic acid solution and the palladium nitrate solution are used as the precursor solution. (2) Using the equal volume impregnation method, impregnate the chloroiridic acid solution in step (1) into the TiO 2 on the carrier. Dry at 120 °C for 24 h in an air atmosphere, and then bake at 400 °C for 6 h in an air atmosphere with a heating rate of 10 °C / min. (3) Immerse the palladium nitrate solution in step (1) on the sample obtained in step (2) by using an equal volume impregnation method. Dry at 120 ℃ for 24 h in air atmosphere, then place in air atmosphere and calcine at 500 ℃ for 6 h at a heating rate of 10 ℃ / min to prepare the methane catalytic combustion catalyst. ...
Embodiment 3
[0024] Bimetallic catalysts containing iridium for the catalytic combustion of methane, said catalysts consisting of noble metals Ir, Pt, their oxides and ZrO 2 Vector composition. (1) Based on the weight of the catalyst as 100%, the weight percentages of Ir and Pt are 0.5% and 0.5% respectively, and the chloroiridic acid solution and the chloroplatinic acid solution are mixed uniformly to obtain a mixed precursor solution. (2) Using the equal volume impregnation method, impregnate the mixed precursor solution in step (1) into the ZrO 2 on the carrier. Dry at 120 °C in an air atmosphere for 12 h, and then bake at 850 °C in an air atmosphere for 5 h at a heating rate of 5 °C / min to prepare a methane catalytic combustion catalyst.
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