Method for preparing sulphur tail gas hydrogenation catalyst
A hydrogenation catalyst, catalyst technology, applied in catalyst activation/preparation, chemical instruments and methods, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of catalyst pore volume, large specific surface area, complex preparation process, etc. problems, to achieve the effect of reducing catalyst loading, high hydrolysis activity, and good hydrothermal stability
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Embodiment 1
[0016] Weigh 7Kg of ammonium molybdate and 4.2Kg of cobalt nitrate in 60 liters of deionized water, stir to dissolve, add 5Kg of citric acid, stir to dissolve, and prepare a stable metal salt solution 1.
[0017] Weigh 70Kg SiO 2 Content is 2.5% (wt), the pore volume is 1.12 milliliters / gram, specific surface area is 445 square meter / gram aluminum hydroxide dry glue, add 3Kg Tianqing powder, mix. Add the metal salt solution 1 above. Knead, extrude into Ф3mm clover strips, dry at 110°C for 4 hours, and bake at 450-550°C for 4 hours to make Co-Mo-SiO 2 -γ-AL 2 o 3 Catalyst (A), wherein molybdenum oxide (MoO 3 ) content is 9.3% (m / m), cobalt oxide (CoO) content is 1.80% (m / m). Its properties are shown in Table 1.
Embodiment 2
[0018] Embodiment 2 (comparative example)
[0019] Weigh 70Kg of aluminum hydroxide dry glue prepared by the method of Example 1, add 3Kg of Tianqing powder, and mix well. Dissolve 4.3Kg (65%) nitric acid in 60 liters of deionized water, stir evenly, add to the above mixed aluminum hydroxide dry glue, knead, extrude into Ф3mm clover strips, dry at 110°C for 4 hours, 550 ℃ calcination for 4 hours to make SiO 2 -γ-AL 2 o 3 carrier.
[0020] Take 80ml of ammonia water with a concentration of 22-28%, heat it to 50°C, add 15g of cobalt nitrate, and slowly add 1ml of ethylenediamine after it is completely dissolved to form a stable cobalt ethylenediamine complex, and then add Stir 24g of ammonium molybdate until completely dissolved, and set the volume to 100ml to obtain a stable cobalt-molybdenum impregnation solution.
[0021] Take 70ml of the above impregnation solution and add it to the 100g of SiO prepared above 2 -γ-AL 2 o 3 In the carrier, immerse for 1 hour, dry at 1...
Embodiment 3
[0023] The preparation method is the same as in Example 1, but the ammonium molybdate is 10Kg, and the cobalt nitrate is 6.3Kg to make Co-Mo-SiO 2 -γ-AL 2 o 3 Carrier (C), in which molybdenum oxide (MoO 3 ) content is 14.7% (m / m), cobalt oxide (CoO) content is 2.75% (m / m). Its properties are shown in Table 1.
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