A kind of low-cost SCR denitration catalyst and preparation method thereof
A denitrification catalyst, low-cost technology, applied in the direction of catalyst activation/preparation, catalyst carrier, chemical instruments and methods, etc., can solve the problems of producing a large amount of waste liquid and waste residue, complex and harsh preparation steps, etc., to reduce hazards and reduce raw material costs , The effect of simple preparation process
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Embodiment 1
[0027] The preparation method of the low-cost SCR denitration catalyst of this embodiment is realized through the following steps:
[0028] Step 1: Crush the low-titanium slag (the composition is shown in Table 1.1), screen out 150g of 20-40 mesh titanium slag, dissolve it in 500mL of sodium hydroxide solution with a mass concentration of 15wt%, and place it in a hydrothermal kettle at 70°C After neutralizing for 5 hours, filter and wash the titanium slag until it becomes neutral, then dry it at 105°C for 10 hours, and finally roast it at 400°C for 5 hours to obtain a catalyst carrier;
[0029] Step 2 Weigh 0.064g of ammonium metavanadate, 1.640g of ammonium tungstate and 1.704g of oxalic acid and dissolve them in 100mL of deionized water, stir at room temperature for 30min, then add 4.126g of copper nitrate and 0.997g of stannous sulfate to continue stirring 90min, so that the substances in the solution are fully mixed and dissolved;
[0030] Step 3 Place the 46g catalyst ca...
Embodiment 2
[0034] The preparation method of the low-cost SCR denitration catalyst of this embodiment is realized through the following steps:
[0035] Step 1: Broken the high-titanium slag (the composition is shown in Table 1.2), screened out 150g of 20-40 mesh titanium slag, dissolved it in 500mL of sodium hydroxide solution with a mass concentration of 15wt%, and placed it in a hydrothermal kettle at 90°C neutralize for 3 hours, then filter and wash the titanium slag until it becomes neutral, then dry it at 120°C for 5 hours, and finally roast it at 400°C for 5 hours to obtain a catalyst carrier;
[0036] Step 2 Weigh 0.193g ammonium metavanadate, 3.557g sodium tungstate and 3.75g oxalic acid and dissolve them in 100mL deionized water, stir at room temperature for 30min, then add 5.894g copper nitrate and 5.358g tin tetrachloride to it Continue to stir for 90 minutes to fully mix and dissolve the substances in the solution;
[0037] Step 3 Place the 41.5g catalyst carrier prepared in ...
Embodiment 3
[0042]The preparation method of the low-cost SCR denitration catalyst of this embodiment is realized through the following steps:
[0043] Step 1: Break the high-titanium slag (the composition is shown in Table 1.2), screen out 150g of 20-40 mesh titanium slag, dissolve it in 500mL of sodium hydroxide solution with a mass concentration of 15wt%, and place it in a hydrothermal kettle at 80°C After neutralizing for 4 hours, filter and wash the titanium slag until it becomes neutral, then dry it at 110°C for 4 hours, and finally roast it at 400°C for 5 hours to obtain a catalyst carrier;
[0044] Step 2 Weigh 0.129g of ammonium metavanadate, 2.187g of ammonium tungstate and 2.316g of oxalic acid and dissolve them in 100mL of deionized water, stir at room temperature for 30min, then add 4.822g of copper chloride and 2.852g of tetrachloride to it Tin continued to stir for 90 minutes to fully mix and dissolve the substances in the solution;
[0045] Step 3 Place the 41.5g catalyst ...
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