Preparation method for environment-friendly denitrification catalyst
A technology of denitrification catalyst and pyrite slag, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of high production cost and hinder application, and achieve the purpose of increasing surface area and weakening mutual Function, improve the effect of void structure
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[0021] Example 1
[0022] 1) Pretreatment of pyrite slag: crush the pyrite slag raw material, sieving out 60-80 mesh pyrite slag, dissolve it in a dilute nitric acid solution with a mass concentration of 2%, stir at room temperature for 6 hours and then filter. After filtering and washing the filtered (ie undissolved) pyrite slag to neutrality, it is dried for 12h at 105°C;
[0023] 2) Modification of pyrite slag: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir to completely dissolve it at room temperature to obtain a sucrose solution; then add 100g of the pyrite slag obtained in step 1) to the sucrose solution And continue to stir and process for 10 minutes to obtain mixture A; transfer mixture A to a hydrothermal reactor and treat it at 220° C. for 2 h to obtain mixture B; the filter cake obtained by filtering mixture B is washed with ethanol 4 times, and then at 110 After drying for 6 hours at ℃, calcining for 4 hours in a nitrogen atmosphere at 500℃ ...
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[0025] Example 2
[0026] 1) Pretreatment of pyrite slag: crush the raw pyrite slag, sieving out 60-80 mesh pyrite slag, dissolving it in a dilute nitric acid solution with a mass concentration of 5%, stirring at room temperature for 4 hours, and then filtering. After filtering and washing the filtered (ie undissolved) pyrite slag to neutrality, it is dried for 12h at 105°C;
[0027] 2) Modification of pyrite slag: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir to completely dissolve it at room temperature to obtain a sucrose solution; then add 100g of the pyrite slag obtained in step 1) to the sucrose solution And continue to stir and process for 15 minutes to obtain mixture A; transfer mixture A to a hydrothermal reactor and treat it at 180°C for 4 hours to obtain mixture B; the filter cake obtained by filtering mixture B is washed 4 times with ethanol, and then at 110 After drying for 6 hours at ℃, calcining for 4 hours in a nitrogen atmosphere at 50...
Example Embodiment
[0029] Example 3
[0030] 1) Pretreatment of pyrite slag: crush the raw material of pyrite slag, sieving out 60-80 mesh pyrite slag, dissolving it in a dilute nitric acid solution with a mass concentration of 3%, stirring at room temperature for 6 hours, and then filtering. After filtering and washing the filtered (ie undissolved) pyrite slag to neutrality, it is dried for 12h at 105°C;
[0031] 2) Modification of pyrite slag: Weigh 100g of sucrose and dissolve it in 200mL of deionized water and stir to completely dissolve it at room temperature to obtain a sucrose solution; then add 100g of the pyrite slag obtained in step 1) to the sucrose solution And continue to stir and process for 15 minutes to obtain mixture A; transfer mixture A to a hydrothermal reactor and treat it at 200°C for 3 hours to obtain mixture B; the filter cake obtained by filtering mixture B is washed 4 times with ethanol, and then at 110 After drying for 6 hours at ℃, calcining for 4 hours in a nitrogen atmo...
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