A kind of sulfur-resistant denitration CO catalytic combustion aid and preparation method thereof
A catalytic combustion and denitrification technology, which is applied in the direction of combustion methods, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor resistance to poisoning, achieve high hydrothermal stability, easy addition and operation, and realize energy saving and emission reduction Effect
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Embodiment 1
[0025] Copper nitrate trihydrate 72.9 g, cerium nitrate hexahydrate 40.4 g, zirconium nitrate pentahydrate 27.9 g, magnesium nitrate hexahydrate 50.9 g, 126.4g of citric acid into a 250mL beaker, add 120mL of water, heat and stir in a 50 °C water bath until completely dissolved, to obtain a uniform maceration solution; weigh the alumina microspheres 200g, add it evenly to the impregnation liquid, stir evenly to get the impregnated post-precursor, the precursor is dried in an oven at 120 °C for 4h, and then roasted in a muffle oven, controlling the heating rate of 1 °C / min, heating up to 680 °C, roasting at this temperature for 4h, After cooling, the auxiliary Cu-Ce-Mg-Zr-O / Al is obtained 2 O 3 , denoted as sample A.
[0026] After testing, the load-weight ratio of the four active components of copper, cerium, zirconium and magnesium in sample A is: Cu-O / Al 2 O 3 0.12, Ce-O / Al 2 O 3 0.08, Zr-O / Al 2 O 3 0.04, Mg-O / Al 2 O 3 is 0.04.
Embodiment 2
[0028] Copper sulfate pentahydrate 56.5 g, cerium sulfate tetrahydrate 37.6 g, zirconium nitrate 11.3 g, magnesium sulfate heptahydrate 36.7 g, 148.9g of citric acid into a 250mL beaker, add 115mL of water, heat and stir in a 50 °C water bath until completely dissolved, to obtain a uniform maceration solution; weigh the alumina microspheres 200g, add it evenly to the impregnation solution, stir evenly to get the impregnated post-precursor, the precursor is dried in an oven at 115 °C for 4.5h, and then roasted in a muffle oven, controlling the heating rate of 3 °C / min, heating up to 680 °C, roasting at this temperature for 4h, After cooling, the auxiliary Cu-Ce-Mg-Zr-O / Al is obtained 2 O 3 , denoted as sample B.
[0029] After testing, the load-weight ratio of the four active components of copper, cerium, zirconium and magnesium in sample B was: Cu-O / Al 2 O 3 0.09, Ce-O / Al 2 O 3 0.08, Zr-O / Al 2 O3 0.03, Mg-O / Al 2 O 3 is 0.03.
Embodiment 3
[0031] Copper chloride dihydrate 77.2 g, cerium chloride heptahydrate 17.3 g, zirconium nitrate pentahydrate 34.8 g, magnesium nitrate hexahydrate 101.8 g, Citric acid 187.8g into a 250mL beaker, add 100mL of water, heat and stir in a 50 °C water bath until completely dissolved, to obtain a uniform impregnation solution; weigh the alumina microspheres 200g, add it evenly to the impregnation solution, stir evenly to get the impregnated post-precursor, the precursor is dried in an oven at 115 °C for 4.5h, and then roasted in a muffle oven, controlling the heating rate of 2 °C / min, heating up to 660 °C, roasting at this temperature for 3h, After cooling, the auxiliary Cu-Ce-Mg-Zr-O / Al is obtained 2 O 3 , denoted as sample C.
[0032] After testing, the load weight ratio of the four active components of copper, cerium, zirconium and magnesium in sample C was: Cu-O / Al 2 O 3 0.18, Ce-O / Al 2 O 3 0.04, Zr-O / Al 2 O 3 0.05, Mg-O / Al 2 O 3 is 0.08.
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