Method for preparing synthesis gas methanation catalyst
A catalyst and gas methane technology, which is applied in the field of synthesis gas methanation catalyst preparation, can solve the problems of catalyst layer erosion, catalyst layer detachment, detachment, etc., and achieve the effect of enhancing the bonding firmness and reducing the possible effect of detachment
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Embodiment 1
[0022] First put the metal substrate into the thermal spraying device, heat it to 1200°C, put the α-alumina nanoparticles into the hopper of the spray gun, the flame temperature is 2500-3500°C, and the pressure is 0.2-1.2MPa. The nanoparticles are sprayed onto the surface of the metal substrate to prepare a composite substrate. Then prepare a 10% pseudo-boehmite aqueous solution, adjust the pH to 2 with 5 mol / L nitric acid, heat and stir at 80° C. for 5 hours to obtain an aluminum sol. After immersing the previous substrate in the aluminum sol for 3 minutes, lift it up at a constant speed of 3 cm / min. After drying at room temperature, dry it at 110°C for 0.5h, and bake it at 600°C for 6h. A nickel nitrate aqueous solution with a concentration of 50% was prepared, heated to 80° C., and the previously obtained substrate was immersed in it for 6 hours. After taking it out, it was dried and aged at 110°C for 6h, and finally baked at 600°C for 6h to prepare the Ni-based catalyst c...
Embodiment 2
[0025] First put the metal substrate into the thermal spraying device and heat it to 1200°C, put the α-alumina nanoparticles into the hopper of the spray gun, the flame temperature is 2800-3200°C, and the pressure is 0.5-0.9MPa. The nanoparticles are sprayed onto the surface of the metal substrate to prepare a composite substrate. Then prepare a 10% pseudo-boehmite aqueous solution, adjust the pH to 2 with 5 mol / L nitric acid, heat and stir at 80° C. for 5 hours to obtain an aluminum sol. After immersing the previous substrate in the aluminum sol for 3 minutes, lift it up at a constant speed of 3 cm / min. After drying at room temperature, dry it at 110°C for 0.5h, and bake it at 600°C for 6h. A nickel nitrate aqueous solution with a concentration of 25% was prepared, heated to 80° C., and the previously obtained substrate was immersed in it for 6 hours. After taking it out, it was dried and aged at 110°C for 6 hours, and finally calcined at 600°C for 6 hours to obtain a Ni-bas...
Embodiment 3
[0027] First put the metal substrate into the thermal spraying device and heat it to 1200°C, put the α-alumina nanoparticles into the hopper of the spray gun, the flame temperature is 2800-3200°C, and the pressure is 0.5-0.9MPa. The nanoparticles are sprayed onto the surface of the metal substrate to prepare a composite substrate. Then prepare a 10% pseudo-boehmite aqueous solution, adjust the pH to 2 with 5 mol / L nitric acid, heat and stir at 80° C. for 5 hours to obtain an aluminum sol. After immersing the previous substrate in the aluminum sol for 3 minutes, lift it up at a constant speed of 3 cm / min. After drying at room temperature, dry it at 110°C for 0.5h, and bake it at 600°C for 6h. A nickel nitrate aqueous solution with a concentration of 12.5% was prepared, heated to 80° C., and the previously obtained substrate was immersed in it for 6 hours. After taking it out, it was dried and aged at 110°C for 6 hours, and finally calcined at 600°C for 6 hours to obtain a Ni...
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