Low-temperature sulfur-tolerant shift catalyst as well as preparation method and application thereof
A sulfur-resistant conversion and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems affecting the structural stability and catalytic activity of catalysts, poor ability to resist fluctuations in working conditions, and precipitation of alkali metals Problems such as loss or hardening, to achieve the effects of shortening residence time, reducing diffusion resistance, and concentrating pore size distribution
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[0069]Example 1
[0070]8.6 g of tetraethyl titanate was dissolved in 30 ml anhydrous alcohol, and 165 g sodium silicate and 100 ml of deionized water were added, then the pH to 10 was adjusted to the solution A with concentrated ammonia water, and 132 g of aluminum nitrate was dissolved in 250 mL deion. In the water, heated to 60 ° C, and the solution A was added while stirring, then the mixed solution was heated to 80 ° C, and the temperature was maintained at a temperature of 4 h, and the material was washed with deionized water to pH 8.0, and dried at 110 ° C, after 3 h after 600 ° C After mixed with 30 g of active alumina powder, 4G Tianjing powder, 2 g of starch, dry mix were added; 10.4 g of ammonium molybdenum was dissolved in 30 ml of deionized water, and the above powder was added, and 3 g of citric acid , 3 g of oxalic acid and 11.7 g of cobalt nitrate were dissolved in 30 ml deionized water, and combined with molding in the above kneading material, then naturally dried, 480...
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[0071]Example 2
[0072]2.9 g of titanate is dissolved in 20 ml of anhydrous alcohol, 71 g sodium silicate and 70 ml of deionized water were added, then the pH to 10 was adjusted to the solution A with concentrated ammonia water, and 147 g of nitrate was dissolved in 280 ml deion. In the water, heated to 60 ° C, and the solution A was added while stirring, then the mixed solution was heated to 80 ° C, and the temperature was 5 h, and the material was washed with deionized water to pH 8.0, dried at 120 ° C, 550 ° C after calcination 2h After mixing ball milling of 50 g of active alumina powder, 3G Tianjing powder, 3 g of starch, dry mixed 20 minutes; 12.4 g of ammonium molybdate dissolved in 40 ml of deionized water, add 3 g of citric acid, 1 ml of dilute nitric acid and 7.8 g of nitrate were dissolved in 30 ml deionized water, and combined with molding in the kneading material, then naturally dried, 400 ° C was baked 5h, and naturally catalyst C2 was obtained.
[0073]Among them, the dilu...
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[0074]Example 3
[0075]11.4 g of tetraethyl titanate was dissolved in 45 ml anhydrous alcohol, 142 g of sodium silicate and 90 ml of deionized water were added, then the pH to 10 was adjusted with concentrated ammonia water to obtain a solution A, and 110 g of nitrate was dissolved in 190 ml to ion In the water, heated to 60 ° C, and the solution A was added while stirring, and then the mixed solution was heated to 80 ° C, and the temperature was 4 h, and the material was washed with deionized water to pH 8.0, dried at 110 ° C, after calcination at 650 ° C for 3 h After mixed with 37 g of active alumina powder, 2G fields, 4G starch, dry mix were added; 7.4 g of ammonium molybdenum was dissolved in 20 mL of deionized water, and the above powder was added, and 5 g of citric acid And 15.5 g of nitrate is dissolved in 35 ml of deionized water, and combined with molding in the above kneading material, then naturally dried, and then the catalyst C3 is obtained after 3 hours of 450 ° C.
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