MnO<x>@Eu-CeO<x> low-temperature SCR flue gas denitration catalyst and preparation method and application thereof
A denitration catalyst and flue gas technology, applied in chemical instruments and methods, heterogeneous catalyst chemical elements, physical/chemical process catalysts, etc., can solve problems such as poor resistance to sulfur poisoning, improve catalytic activity and improve dispersibility , the effect of excellent NH3-SCR performance
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Embodiment 1
[0032] (1) MnO x Preparation of nanorods: 1.2156 g KMnO 4 Add to 157.4 mL of deionized water and stir to dissolve. After dissolving, add 2.6 mL of 37 wt% hydrochloric acid, continue stirring, and finally dilute to 160 mL. The solution was transferred to a 200 mL reactor, heated to 140 °C, and reacted for 12 h. Naturally cooled to room temperature, the product was taken out, washed to neutrality, and dried at 80°C for 12 h to obtain a powdery solid product.
[0033] (2) MnO x @Eu-CeO x Preparation: 1.14g of MnO x Add the nanorod powder into 60 mL of absolute ethanol, ultrasonically stir and disperse evenly, then add hexamethylenetetramine solution, cerium nitrate hexahydrate solution and europium nitrate hexahydrate solution in sequence, and control the addition rate of the three solutions The reaction was carried out under heating and stirring in a water bath at 75°C for 3 hours (the addition rates of hexamethylenetetramine solution, cerium nitrate hexahydrate solution a...
Embodiment 2
[0035] (1) MnO x Preparation of nanorods: 1.2156 g KMnO 4 Add to 157.4 mL of deionized water and stir to dissolve. After dissolving, add 2.0 mL of 37 wt% hydrochloric acid, continue stirring, and finally dilute to 160 mL. The solution was transferred to a 200 mL reactor, heated to 140 °C, and reacted for 6 h. Naturally cooled to room temperature, the product was taken out, washed to neutrality, and dried at 80°C for 6 h to obtain a powdery solid product.
[0036] (2) MnO x @Eu-CeO x Preparation: 0.7g of MnO x Add the nanorod powder into 40 mL of absolute ethanol, ultrasonically stir and disperse evenly, then add hexamethylenetetramine solution, cerium nitrate hexahydrate solution and europium nitrate hexahydrate solution in sequence, and control the addition rate of the three solutions The reaction was carried out under heating and stirring in a water bath at 70°C for 4 hours (the addition rates of hexamethylenetetramine solution, cerium nitrate hexahydrate solution and ...
Embodiment 3
[0038] (1) MnO x Preparation of nanorods: 1.2156 g KMnO 4 Add it into 157.4 mL of deionized water and stir to dissolve; after dissolving, add 3 mL of 37 wt% hydrochloric acid and continue stirring, and finally set the volume to 160 mL; transfer the solution to a 200 mL reactor, heat up to 140 °C, and react for 24 h; naturally cool to room temperature, take out the product, wash the product to neutrality, and dry at 80°C for 24 h to obtain a powdery solid product;
[0039] (2) MnO x @Eu-CeO x Preparation: 2.5g of MnO x Add the nanorod powder into 80 mL of absolute ethanol, ultrasonically stir and disperse evenly, then add hexamethylenetetramine solution, cerium nitrate hexahydrate solution and europium nitrate hexahydrate solution in sequence, and control the addition rate of the three solutions The reaction was carried out under heating and stirring in a water bath at 80°C for 2 h (the addition rates of hexamethylenetetramine solution, cerium nitrate hexahydrate solution, ...
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