A kind of co&co 2 Co-methanation catalyst and its preparation method and application
A methanation catalyst and a technology for methanation catalysis, which are applied in physical/chemical process catalysts, carbon compound catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem that the reaction conditions need to be further optimized and the catalyst preparation process is complicated. , poor industrial application prospects and other problems, to achieve the effect of good catalyst repeatability, good industrial application prospects, and easy control of reaction conditions
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Embodiment 1
[0029] (1) Put 26.55g of lanthanum nitrate, 50g of pseudoboehmite and 10g of plant glue into the kneader, add 250mL of deionized water, add dilute nitric acid to adjust the pH to 3-4, fully knead to obtain aluminum sol, and then add 400g of TiO 2 powder and 278g Zr(OH) 4 The powder is mixed and kneaded into a plastic mass, and then extruded with an extruder to form a strip, left at room temperature for 6-20 hours, then dried at 80-120°C for 4-6h and roasted at 500°C for 4-8h to obtain the carrier;
[0030] (2) 5.9g of nickel nitrate, 0.823g of manganese nitrate and 5g of deionized water were prepared into a solution, and 10g of the above-mentioned carrier was impregnated in it, the number of immersions was 1-3 times, and the total time of immersion was 4-10h. Stand for 4-12h and dry at 110°C for 4-10h;
[0031] (3) Place the material obtained in step (2) in a muffle furnace, raise the temperature to 550°C at a heating rate of 2-5°C / min, and roast for 4-8h to obtain the CO&CO ...
Embodiment 2
[0034] (1) with embodiment 1;
[0035] (2) 5.9g of nickel nitrate, 1.646g of manganese nitrate and 5g of deionized water were prepared into a solution, and 10g of the above-mentioned carrier was impregnated in it. The number of immersions was 1-3 times, and the total time of immersion was 4-10h. Stand for 4-12h and dry at 110°C for 4-10h;
[0036](3) Place the material obtained in step (2) in a muffle furnace, raise the temperature to 550°C at a heating rate of 2-5°C / min, and roast for 4-8h to obtain the CO&CO 2 Co-methanation catalyst.
[0037] The CO&CO that this embodiment makes 2 Co-methanation catalyst for fixed bed CO&CO 2 Co-methanation reaction, the composition of the reaction gas contains CO, CO 2 and H 2 , H 2 The volume ratio of H and CO is 5:1, H 2 and CO 2 The volume ratio is 10:1, the space velocity of the reaction gas is 5000 / h, the reaction temperature is 450°C, the reaction time is 2h, and the reaction pressure is 1MPa.
Embodiment 3
[0039] (1) Put 26.55g of lanthanum nitrate, 63g of cerium nitrate, 50g of pseudoboehmite and 10g of plant glue into a kneader, add 250mL of deionized water, add dilute nitric acid to adjust the pH to 3-4, fully knead to obtain aluminum sol, and then Add 400g TiO 2 powder and 278gZr(OH) 4 The powder is mixed and kneaded into a plastic dough, and then extruded with an extruder to form a strip, left at room temperature for 6-20 hours, then dried at 80-120°C for 4-6h and roasted at 500°C for 4-8h to obtain the carrier;
[0040] (2) 5.9g of nickel nitrate, 1.646g of manganese nitrate and 5g of deionized water were prepared into a solution, and 10g of the above-mentioned carrier was impregnated in it. The number of immersions was 1-3 times, and the total time of immersion was 4-10h. Stand for 4-12h and dry at 110°C for 4-10h;
[0041] (3) Place the material obtained in step (2) in a muffle furnace, raise the temperature to 550°C at a heating rate of 2-5°C / min, and roast for 4-8h t...
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