Pyrolysis gasoline selective hydrogenation catalyst and preparation method thereof
A technology for selective hydrogenation and pyrolysis of gasoline, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of affecting the catalytic performance of active components and low catalyst dispersion , Catalyst performance deterioration and other problems, to achieve the effect of shortening the preparation cycle, reducing the emission of gas pollutants, and reducing the content
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[0049] Example 1
[0050] The nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], manganese nitrate [Mn(NO 3 ) 3 ·6H 2 O), potassium nitrate (K NO 3 ) Dissolve in water to make an aqueous solution, then adjust the pH of the solution to 10 with ammonia water, and impregnate the above alumina carrier by the equal amount immersion method. After the infrared lamp is baked for 20 minutes, take deionized water and isopropyl in a volume ratio of 1:1 40ml of the mixed solution prepared with alcohol is poured into the carrier loaded with nickel, and the excess solution is poured out after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated for 15h at a dose rate of 30Gy / min. The irradiated sample was dried at 120°C for 6 hours to obtain catalyst A, in which the nickel content was 14%, the manganese content was 1.1%, and the potassium content was 1.6%.
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[0051] Example 2
[0052] The nickel nitrate [Ni(NO 3 ) 2 ·6H 2 O], ammonium molybdate [(NH 4 ) 2 Mo 7 O 24 ·4H 2 O], calcium nitrate [Ca(NO 3 ) 2 ] Dissolve in water to make an aqueous solution, then adjust the pH of the solution to 6 with ammonia water, and impregnate the above alumina carrier with an equal amount of immersion method. After the infrared lamp is baked for 20 minutes, take deionized water and isopropyl in a volume ratio of 1:1 40ml of the mixed solution prepared with alcohol was poured into the carrier loaded with nickel-molybdenum-calcium, and the excess solution was poured out after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated for 15h at a dose rate of 30Gy / min. The irradiated sample was dried at 120° C. for 6 hours to obtain catalyst B, in which the nickel content was 16%, the Mo content was 1.0%, and the calcium content was 1.2%.
Example Embodiment
[0053] Example 3
[0054] Weigh 26.5g of commercially available magnesium nitrate [Mg(NO 3 ) 2 .6H 2 O] Dissolve in 30ml of ionized water, then dilute to 70ml with ionized water, weigh 100g of lanthanum-modified alumina carrier, spray the configured 70ml of magnesium nitrate solution on the alumina carrier, dry it and place it in an oven at 120℃ Dry for 24 hours, use the same steps and conditions as in Example 1 to prepare a carrier loaded with nickel-Mn-Mg-k. After standing for 20 minutes, take deionized water and isopropanol with a volume ratio of 1:1. Pour 40ml of the mixed solution of Ni-Mn-Mg-k into the carrier loaded with Ni-Mn-Mg-k, and pour out the excess solution after uniform dispersion. Use the product under vacuum 60 The Coγ radiation source was irradiated for 15h at a dose rate of 30Gy / min. The irradiated sample was dried at 120°C for 6 hours to obtain catalyst C, in which the nickel content was 14%, the Mn content was 1.0%, the Mg content was 2.0%, and the potassiu...
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