Method for hydrogen removal of CO mixed gas by selective oxidation
A mixed gas, selective oxidation technology, applied in the direction of carbon monoxide, etc., can solve the problems of low hydrogen removal rate and high CO loss rate
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Embodiment 1
[0019] Catalyst preparation:
[0020] Weigh 100 grams of alumina carrier whose specific surface area is 50 square meters per gram, according to 0.5% Pd / Al 2 o 3 The content of the catalyst is configured as follows: select palladium nitrate, prepare an impregnation solution according to the palladium load, impregnate the alumina carrier in the solution for 10 hours, and dry it in vacuum at room temperature for 12 hours to obtain a solid. The solid was then dried at 120°C for 4 hours, calcined at 450°C for 6 hours, and then reduced with hydrogen at 300°C for 4 hours to obtain the desired 0.5% Pd / Al 2 o 3 catalyst.
[0021] The inert filler is selected from alumina, the mixing ratio of the inert filler and the catalyst is 1:1, the CO gas with a hydrogen content of 1% is used as the raw material, and the molar ratio of hydrogen in the oxygen to the raw material is 0.8:1. The mixed bed reactor The reaction temperature is 150°C, and the volumetric space velocity is 500 hours -1...
Embodiment 2
[0023] Prepare 0.8%Pd / Al according to the catalyst preparation method of embodiment 1 2 o 3 catalyst.
[0024] The inert filler is selected from alumina, the mixing ratio of the inert filler and the catalyst is 2:1, the CO gas with a hydrogen content of 3% is used as the raw material, and the molar ratio of hydrogen in the oxygen to the raw material is 2:1, the mixed bed reactor The reaction temperature is 180°C, and the volume space velocity is 1500 hours -1, under the condition that the reaction pressure is 2.0MPa, the raw material is contacted with the catalyst through a mixed bed reactor equipped with an inert filler and a palladium-containing catalyst, and the reaction is carried out. The reaction result is: the loss rate of CO is 0.5%, and the hydrogen in the reaction effluent The content is 3ppm.
Embodiment 3
[0026] Prepare 1.2%Pd / Al according to the catalyst preparation method of embodiment 1 2 o 3 catalyst.
[0027] The inert filler is selected from inert ceramic balls, the mixing ratio of the inert filler and the catalyst is 3:1, the CO gas with a hydrogen content of 0.3% is used as the raw material, and the molar ratio of hydrogen in the oxygen to the raw material is 5:1, and the mixed bed reaction The reactor reaction temperature is 200°C, and the volume space velocity is 5000 hours -1 , under the condition that the reaction pressure is 0.05MPa, the raw material is contacted with the catalyst through a mixed bed reactor equipped with an inert filler and a palladium-containing catalyst, and the reaction is carried out. The reaction result is: the loss rate of CO is 0.6%, and the hydrogen in the reaction effluent content is 0.
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