Preparation method and application of novel catalyst for carbon dioxide methanation
A methanation catalyst and catalyst technology, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problems of low loading of active components, narrow use temperature range, poor selectivity, etc., and achieve good water quality Thermal stability and anti-sintering anti-carbon deposition, increase the use temperature range, and increase the effect of load
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Embodiment 1
[0027] (1) heat-treat the H-β molecular sieve; (2) dissolve a certain amount of nickel nitrate in deionized water to form a solution of 0.1 mol / L-0.3 mol / L; (3) mix the heat-treated molecular sieve with nitric acid The aqueous solution of nickel is mixed and placed at 80 o Stir in a water bath in C for 4 h under an air atmosphere; (4) transfer the obtained sample aqueous solution to wash and filter several times until the nitrate ions in the solution are removed; (5) transfer the sample to an oven for 100 o C drying for 2 h, and then dried samples at 550 o C calcined for 6 h, and finally the desired catalyst was obtained. (6) Weigh 0.5 g of the modified Ni-β catalyst and place it in a fixed-bed reactor, then start to heat up the fixed bed, at 60 ml / min H 2 Heat up to 600 in flow o C was reduced for 1 h. After the reduction is completed, it will be cooled to room temperature, and then H 2 / CO 2 = 4 mixture at 300-600 o Reaction within the temperature range of C, the rea...
Embodiment 2
[0029] (1) heat-treat the H-β molecular sieve; (2) dissolve a certain amount of zirconium nitrate in deionized water to form a solution of 0.1 mol / L-0.3 mol / L; (3) mix the heat-treated molecular sieve with nitric acid The aqueous solution of zirconium was mixed and placed at 80 o Stir in a water bath in C for 4 h under an air atmosphere; (4) transfer the obtained sample aqueous solution to wash and filter several times until the nitrate ions in the solution are removed; (5) transfer the sample to an oven for 100 o C drying for 2 h, and then dried samples at 550 o C calcined for 6 h, and finally the desired catalyst was obtained. (6) Weigh 0.5 g of the modified Zr-β catalyst and place it in a fixed-bed reactor, then start to heat up the fixed bed, at 60 ml / min H 2 Heat up to 600 in flow o C was reduced for 1 h. After the reduction is completed, it will be cooled to room temperature, and then H 2 / CO 2 = 4 mixture at 300-600 o Reaction within the temperature range of C, ...
Embodiment 3
[0031] (1) Heat-treat the H-β molecular sieve; (2) Dissolve a certain amount of copper nitrate in deionized water to form a solution of 0.1mol / L-0.3 mol / L; (3) Heat-treated molecular sieve nitric acid The aqueous solution of copper is mixed and placed at 80 o Stir in a water bath in C for 4 h under an air atmosphere; (4) transfer the obtained sample aqueous solution to wash and filter several times until the nitrate ions in the solution are removed; (5) transfer the sample to an oven for 100 o C drying for 2 h, and then dried samples at 550 o C was calcined for 6 h, and finally the desired catalyst was obtained. (6) Weigh 0.5 g of the modified Cu-β catalyst and place it in a fixed-bed reactor, then start to heat up the fixed bed, at 60 ml / min H 2 Heat up to 600 in flow o C was reduced for 1 h. After the reduction is completed, it will be cooled to room temperature, and then H 2 / CO 2 = 4 mixture at 300-600 o Reaction within the temperature range of C, the reaction pres...
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