Preparation method of chromium-free wide-temperature water-gas shift catalyst, catalyst and application
A water-gas shift, catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. and other problems, to achieve the effect of simple operation, wide adiabatic temperature rise range and convenient use.
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Embodiment 1
[0051] The preparation process of chromium-free wide temperature water gas shift catalyst prepared by co-precipitation method, the catalyst is marked as co-precipitation method Fe 3 o 4 / CuO / MnO 2 Catalyst, its step is as follows:
[0052] Weigh a certain amount of Fe(NO 3 )3·9H 2 O32.32g, Cu(NO 3 ) 2 ·3H 2 O4.84g, 35.8g of 50% manganese nitrate solution, is mixed with metal salt mixed solution;
[0053] Weigh 27.90g of precipitant KOH, K 2 CO 3 9.96g, prepare alkali solution;
[0054] Add lye to the beaker until the pH value is about 10, and start adding the metal solution and precipitant dropwise to keep the solution alkaline and the pH value is about 10;
[0055] After the titration of the metal solution is completed, stir for another 5 minutes;
[0056] Aging 2~4h, aging temperature 50~60℃;
[0057] After aging, the catalyst was washed, and the obtained filter cake was placed in an oven at 50° C. for 12 hours, and then roasted at 400° C. for 6 hours to obtain t...
Embodiment 2
[0059] The preparation process of chromium-free wide temperature water gas shift catalyst prepared by sol-gel method, the catalyst is marked as sol-gel method Fe 3 o 4 / CuO / MnO 2 Catalyst, its step is as follows:
[0060] Weigh Fe(NO 3 ) 3 9H 2 O4.84g, Cu(NO 3 ) 2 ·3H 2 O32.32g and 35.8g of 50% manganese nitrate solution are configured into metal salt mixed solution in proportion;
[0061] Take citric acid 92.2g by weighing and make solution;
[0062] Slowly add citric acid solution into the metal salt mixed solution at a water bath temperature of 50°C under stirring. After adding the citric acid solution, continue to stir until the mixture is uniform;
[0063] The temperature of the water bath is raised to 70°C, and the water in the solution is evaporated as much as possible until a gel is formed;
[0064] Transfer the jelly to a muffle furnace at 350°C and bake for 20 minutes;
[0065] Raise the temperature of the muffle furnace to 400°C and keep it for 4h to pre...
Embodiment 3
[0069] Preparation process of chromium-free wide temperature water gas shift catalyst:
[0070] Weigh a certain amount of Fe(NO 3 ) 3 9H 2 O 16.16g, Cu(NO 3 ) 2 ·3H 2 O3.62g and 50% Mn(NO 3 ) 2 Solution 28.64g, add 400ml H 2 O is prepared into a metal salt mixture;
[0071] Weigh the four precipitants and add 400ml H 2 O and prepare the following lye:
[0072] ①Weigh 19.63g of precipitant KOH, K 2 CO 3 8.3g, prepared with alkali solution, marked as K 2 CO 3 -KOH;
[0073] ② Weigh K 2 CO 3 32.5g, marked K 2 CO 3 ;
[0074] ③ Weigh 26.4g of KOH and mark it as KOH;
[0075] ④ Weigh Na 2 CO 3 14g, NaOH 6.4g, marked as Na 2 CO 3 -NaOH.
[0076] Add lye to the beaker until the pH value is about 10, then start to drop the metal solution and ①~④ precipitant respectively to keep the solution alkaline and the pH value is about 10;
[0077] After the titration of the metal solution is completed, stir for another 5 minutes;
[0078] Aging 2~4h, aging temperatur...
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