Low-temperature denitrification catalyst and preparation method thereof
A low-temperature denitrification and catalyst technology, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poisoning, difficult life guarantee, and catalyst instability
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[0030] A kind of preparation method of low-temperature denitration catalyst proposed by an embodiment of the present invention, it comprises:
[0031] 1) Disperse graphene oxide and nitrogen-containing substances in water, heat at 100-200°C for 5-48h, wash and filter, and obtain nitrogen-doped graphene; wherein, the mass ratio of graphene oxide to nitrogen-containing substances is 1:10- 100. The nitrogen-containing substance is at least one of urea, ammonia water, hydrazine hydrate, methylamine, dimethylamine, ethylamine, diethylamine, propylamine and butylamine.
[0032] 2) dissolving the transition metal salt in water to form a metal precursor solution;
[0033] Wherein, the transition metal salt is at least one of manganese salt, vanadium salt, tungsten salt, molybdenum salt, cerium salt and iron salt;
[0034] The combination of transition metal salts can be any one of manganese salt, cerium salt, and iron salt; the molar ratio of Ce element to Mn element is 0.01-1, and t...
Embodiment 1
[0049] A kind of preparation method of low-temperature denitration catalyst proposed by an embodiment of the present invention, it comprises:
[0050] 1) Add 12g of urea to 200mL of 2g / L graphene oxide aqueous dispersion, place in a reaction kettle at 160°C, stop heating after 5h, wash and filter after cooling to obtain nitrogen-doped graphene;
[0051] 2) Heat 200 mL of deionized water, add 0.7 g of ammonium metavanadate, then add 500 μL of ethanolamine to dissolve the ammonium metavanadate, then add 1.1 g of ammonium molybdate tetrahydrate, dissolve and mix well to obtain a metal precursor solution;
[0052] 3) Add 20g of titanium dioxide and 0.4g of nitrogen-doped graphene to the metal precursor solution; add 1mL of ammonia water dropwise, then place it in a reaction kettle at 150°C for 5h, take it out, filter, wash and dry it, and obtain a catalyst powder;
[0053] 4) Under the condition of high-purity nitrogen, the catalyst powder is calcined at 450° C. for 3 hours to obt...
Embodiment 2
[0056] A kind of preparation method of low-temperature denitration catalyst proposed by an embodiment of the present invention, it comprises:
[0057] 1) Add 12g of urea to 200mL of 2g / L graphene oxide aqueous dispersion, place in a reaction kettle at 160°C, stop heating after 5h, wash and filter after cooling to obtain nitrogen-doped graphene;
[0058] 2) Heat 200 mL of deionized water, add 0.7 g of ammonium metavanadate, then add 500 μL of ethanolamine to dissolve the ammonium metavanadate, then add 1.1 g of ammonium metatungstate, dissolve and mix well to obtain a metal precursor solution;
[0059] 3) Add 20g of titanium dioxide and 0.4g of nitrogen-doped graphene to the metal precursor solution, add 1mL of ammonia water dropwise, then place it in a reaction kettle at 150°C for 5h, take it out, filter, wash and dry it, and obtain a catalyst powder;
[0060] 4) Under the condition of high-purity nitrogen, the catalyst powder is calcined at 450° C. for 3 hours to obtain a low...
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