Cobalt-based catalyst for removing CO from hydrogen-rich gas as well as preparation method and application of cobalt-based catalyst
A cobalt-based catalyst and catalyst technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, etc., can solve problems affecting the catalytic performance of cobalt-based catalysts for CO methanation , to achieve the effects of good hydrothermal stability, good mechanical strength and low reaction temperature
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Embodiment 1
[0036] A preparation method of a hydrogen-rich gas for removing CO cobalt-based catalyst, comprising the following steps:
[0037] (1) prepare the aluminum sulfate-manganese nitrate aqueous solution of 0.25mol / L, wherein Al:Mn(mol / mol)=0.1:1, then prepare the sodium metaaluminate aqueous solution of 0.75mol / L; put the above two solutions in a water bath The co-precipitation was carried out at 55°C, and the flow rate of the two liquids was adjusted to control pH=7.5; after the precipitation was completed, it was aged at 70°C for 12 hours; after the aging, washed with deionized water until the sodium ions and sulfate ions were all less than 5ppm, then filter to obtain a filter cake, dry the filter cake at 100 °C for 10 hours to obtain a precursor, and then calcinate at 750 °C for 5 hours to obtain an aluminum-manganese composite oxide carrier;
[0038] (2) According to the weight ratio of tricobalt tetroxide and metal auxiliary chromium oxide in the final catalyst, weigh 181.18g...
Embodiment 2
[0042] A preparation method of a hydrogen-rich gas for removing CO cobalt-based catalyst, comprising the following steps:
[0043] (1) prepare the aluminum nitrate-manganese acetate aqueous solution of 0.5mol / L, wherein Al:Mn (mol / mol)=0.2:1, then prepare the potassium metaaluminate aqueous solution of 1.5mol / L; put the above two solutions in a water bath Co-precipitation was carried out at 45°C, and pH=8.0 was controlled by adjusting the flow rates of the two liquids; after precipitation, aged at 80°C for 8 hours; after aging, washed with deionized water until potassium ions were less than 5ppm, and then filtered A filter cake was obtained, the filter cake was dried at 90°C for 12 hours to obtain a precursor, and then calcined at 850°C for 2 hours to obtain an aluminum-manganese composite oxide carrier;
[0044] (2) according to the weight ratio of tricobalt tetroxide and metal auxiliary vanadium oxide in the final catalyst, take by weighing 186.05g cobalt acetate and 2.57g a...
Embodiment 3
[0048] A preparation method of a hydrogen-rich gas for removing CO cobalt-based catalyst, comprising the following steps:
[0049] (1) prepare the aluminum nitrate-manganese sulfate aqueous solution of 0.6mol / L, wherein Al:Mn(mol / mol)=0.3:1, then prepare the sodium metaaluminate aqueous solution of 1.8mol / L, the two solutions have the same volume; The two solutions were co-precipitated in a water bath at 65 °C, and the flow rate of the two liquids was adjusted to control pH = 7.0; after the precipitation, aged at 75 °C for 10 h; after the aging, washed with deionized water until sodium ions , sulfate ions are less than 5ppm, and then filter to obtain a filter cake, the filter cake is dried at 150 ° C for 8 hours to obtain a precursor, and calcined at 800 ° C for 4 hours to obtain an aluminum-manganese composite oxide carrier;
[0050] (2) According to the weight ratio of tricobalt tetroxide and metal auxiliary niobium oxide in the final catalyst, weigh 235.54g of cobalt nitrat...
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