Catalyst for eliminating hydrocarbon impurity from CO2 and its prepn and application
A carbon dioxide and catalyst technology, which is used in the catalyst, preparation and application fields for removing hydrocarbon impurities in carbon dioxide, can solve the problems of incompatibility, high space velocity, large catalyst bed resistance, etc., and achieves high purification rate and uniform distribution. , the effect of physical stability
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Embodiment 1
[0027] Weigh 200g Al 2 o 3 The dried rubber powder was mixed with 8g scallop powder, poured into the kneader and mixed for 5 minutes. Dissolve 10 g of SnCl in deionized water 4 ·5H 2 O and 5g citric acid, and add 1.5ml nitric acid. Adding Sn-containing solution to Al 2 o 3 In the mixture, with Al 2 o 3 The powder is kneaded for about 15 minutes, and extruded into a φ4 toothed ball with 6 teeth and a 0.5 hole in the middle of the toothed ball. Blow drying at 100-120°C for 5 hours, and calcining at 980-990°C for 4 hours to make a carrier.
[0028] Weigh 100g of the prepared carrier and immerse it in a solution containing 0.32g of Pd, take it out after 30 minutes, drain the water, dry at 100-110°C for 5 hours, and bake in a muffle furnace at 500°C for 3 hours. Prepare the catalyst of the present invention. In the catalyst, Pd accounts for 0.3% of the catalyst weight, Sn accounts for 2.3% of the catalyst weight, and the carrier is θ, δ-Al 2 o 3 Mixed crystal forms. Ca...
Embodiment 2
[0032] Weigh 200g Al 2 o 3 Dry rubber powder is mixed with 10g of starch, poured into the kneader and mixed for 5 minutes. Dissolve 12g of SnCl in deionized water 4 ·5H 2 O, and add 2.0ml acetic acid and 15ml 25% silica sol. Adding Sn-containing solution to Al 2 o 3 In the mixture, with Al 2 o 3 The powder is kneaded for about 15 minutes, and extruded into a φ4 toothed ball with 6 teeth and a 0.5 hole in the middle of the toothed ball. Blast drying at 100-120°C for 5 hours, and calcining at 1000-1010°C for 4 hours to make a carrier.
[0033] Weigh 100g of the prepared carrier and immerse it in an aqueous solution containing palladium chloride, take it out after 30 minutes, drain the water, dry it at 100-110°C for 5 hours, and bake it in a muffle furnace at 500°C for 3 hours. The carrier impregnated with palladium is then immersed in an aqueous solution containing chloroplatinic acid, taken out after 20 minutes, dried at 100-110°C for 5 hours, and calcined at 500°C in ...
Embodiment 3
[0037] Weigh 200g Al 2 o 3 The dried rubber powder was mixed with 8 g of scallop powder, and mixed in a kneader for 5 minutes. Dissolve 12g of SnCl in deionized water 4 ·5H 2 O and 5g La(NO 3 ) 3 ·nH 2 O, and add 2.0ml acetic acid. with Al 2 o 3 The powder is kneaded for about 15 minutes, and extruded into a φ3.2 trilobal strip. Blast drying at 100-120°C for 5 hours, and calcining at 1000-1010°C for 4 hours to make a carrier.
[0038] Weigh 100g of the carrier prepared by the above method, immerse in the mixed solution containing Pd and Pt, take it out after 40 minutes, drain the water, dry at 100-110°C for 5 hours, and bake in a muffle furnace at 500°C for 3 hours. Prepare the catalyst of the present invention. In the catalyst, Pd accounts for 0.15% of the catalyst weight, Pt accounts for 0.15% of the catalyst weight, Sn accounts for 2.4% of the catalyst weight, and the carrier is θ, δ-Al 2 o 3 Mixed crystal form, catalyst specific surface area 110m 2 / g, pore v...
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