a mno 2 Preparation method and application of coal-ldo low-temperature flue gas denitrification catalyst
A denitration catalyst, low temperature flue gas technology, applied in catalyst activation/preparation, metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, etc. The high temperature of the working window can achieve the effect of good water resistance and sulfur resistance, good thermal stability and large specific surface area.
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Embodiment 1
[0051] (1) Weigh 4.37 g of cobalt nitrate nonahydrate and 1.87 g of aluminum nitrate nonahydrate into a beaker, add 80.0 mL of deionized water into the beaker, stir with a magnetic stirrer for 10 min to completely dissolve, and set aside;
[0052] (2) Weigh 0.80 g of hexamethylenetetramine, and add 56.0 mL of deionized water into a beaker to prepare it to a concentration of 0.10 mol L -1 The hexamethylenetetramine solution, stand-by;
[0053] (3) Add the above-prepared hexamethylenetetramine solution into the above-prepared mixed nitrate solution, stir vigorously at 800 r / min for 30 min, and then seal the obtained precipitate and mother liquor in polytetrafluoroethylene In a stainless steel reaction kettle lined with vinyl fluoride, heat in an oven at 140 °C for 12 h;
[0054] (4) After the reaction kettle was naturally cooled, the reacted solution was suction-filtered to obtain a precipitate, which was washed with deionized water several times until neutral, and dried in an ...
Embodiment 2
[0064] (1) Weigh 2.91 g of cobalt nitrate nonahydrate and 1.87 g of aluminum nitrate nonahydrate into a beaker, add 70.0 mL of deionized water into the beaker, stir with a magnetic stirrer for 10 min to completely dissolve, and set aside;
[0065] (2) Weigh 0.61 g of hexamethylenetetramine, and add 45.0 mL of deionized water into a beaker to prepare it to a concentration of 0.10 mol L -1 The hexamethylenetetramine solution, stand-by;
[0066] (3) Add the above-prepared hexamethylenetetramine solution into the above-prepared mixed nitrate solution, stir vigorously at 800 r / min for 30 min, and then seal the obtained precipitate and mother liquor in polytetrafluoroethylene In a stainless steel reaction kettle lined with vinyl fluoride, heat in an oven at 140 °C for 12 h;
[0067] (4) After the reaction kettle is naturally cooled, filter the reacted solution to get the precipitate, wash it with deionized water several times until neutral, put it in an oven for 12 h at 60 °C, grin...
Embodiment 3
[0073] (1) Weigh 4.37 g of cobalt nitrate nonahydrate and 1.87 g of aluminum nitrate nonahydrate into a beaker, add 80.0 mL of deionized water into the beaker, stir with a magnetic stirrer for 10 min to completely dissolve, and set aside;
[0074] (2) Weigh 0.80 g of hexamethylenetetramine, and add 56.0 mL of deionized water into a beaker to prepare it to a concentration of 0.10 mol L -1 The hexamethylenetetramine solution, stand-by;
[0075] (3) Add the above-prepared hexamethylenetetramine solution into the above-prepared mixed nitrate solution, stir vigorously at 800 r / min for 30 min, and then seal the obtained precipitate and mother liquor in polytetrafluoroethylene In a stainless steel reaction kettle lined with vinyl fluoride, heat in an oven at 140 °C for 12 h;
[0076] (4) After the reaction kettle is naturally cooled, filter the reacted solution to get the precipitate, wash it with deionized water several times until neutral, put it in an oven for 12 h at 60 °C, grin...
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