A kind of synthesis gas low temperature deoxygenation catalyst and its preparation and application
A deoxygenation catalyst, synthesis gas technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, heterogeneous catalyst chemical element, etc., can solve the problem of high precious metal content, complicated preparation process, production The problem of high cost is achieved, and the effect of simple preparation process, safe and convenient operation, and reduced preparation cost is achieved.
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Embodiment 1
[0029] Dissolve 0.11 g of palladium nitrate, 1.13 g of lanthanum nitrate, 3.42 g of copper nitrate and 2.09 g of zirconium nitrate in 36 g of water to make a mixed solution, then add hydrochloric acid dropwise to adjust the pH value of the mixed solution to 2.0, mix 100 g of α-alumina The balls were poured into the pH-adjusted mixed solution for 30 minutes, dried at 120 °C for 3 hours, calcined at 550 °C for 4 hours, and finally reduced with a 3.3% hydrazine hydrate aqueous solution for 8 hours, and then deionized Washed with water to neutrality and dried at 150° C. for 5 hours to obtain the catalyst, wherein the Pd content is 0.051%, the lanthanum oxide content is 0.43%, the copper oxide content is 1.13%, and the zirconia content is 0.6%.
[0030] In the general practice, 200 ml of hydrazine hydrate aqueous solution is added to every 100 mg of catalyst.
[0031] The α-alumina pellets are: the specific surface area is 50m 2 / g, the pore volume is 0.31m 3 / g, the average pore...
Embodiment 2
[0035] Dissolve 0.18 grams of palladium nitrate, 1.13 grams of lanthanum nitrate, 1.71 grams of cerium nitrate, 1.6 grams of ferric nitrate and 2.2 grams of zinc nitrate in 38 grams of water to make a mixed solution, then add hydrochloric acid dropwise to adjust the pH value of the mixed solution to 2.5. The α-alumina balls were poured into the mixed solution after adjusting the pH and immersed for 30 minutes, dried at 120 °C for 3 hours, calcined at 500 °C for 4 hours, and finally reduced with a 3.3% hydrazine hydrate aqueous solution for 16 hours, and then After washing with deionized water to neutrality and drying at 150°C for 5 hours, the catalyst was obtained, wherein the content of Pd was 0.083%, the content of lanthanum oxide was 0.43%, the content of cerium oxide was 0.68%, the content of iron oxide was 0.32%, and the content of zinc oxide was 0.6%. .
[0036] The α-alumina pellets are: the specific surface area is 20m 2 / g, the hole volume is 0.25m 3 / g, the average...
Embodiment 3
[0040] Dissolve 0.18 grams of palladium nitrate, 0.97 grams of samarium nitrate, 3.5 grams of nickel nitrate and 1.75 grams of cobalt nitrate in 36 grams of water to make a mixed solution, then add hydrochloric acid dropwise to adjust the pH value of the mixed solution to 3.5, add 100 grams of α-alumina The ball was poured into the mixed solution after adjusting the pH for 30 minutes, dried at 120°C for 3 hours, calcined at 550°C for 5 hours, and finally reduced with a 3.3% hydrazine hydrate aqueous solution for 14 hours, and then washed with deionized water to Neutral, drying at 150°C for 5 hours to obtain the catalyst, wherein the Pd content is 0.083%, the samarium oxide content is 0.38%, the nickel oxide content is 0.9%, and the cobalt oxide content is 0.45%.
[0041] The α-alumina pellets are: the specific surface area is 35m 2 / g, the hole volume is 0.35m 3 / g, the average pore size is 30nm, the bulk specific gravity is 0.64g / ml, and the particle size range is 3-5mm.
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