A kind of rare earth cerium-based low-temperature denitrification catalyst with high sulfur resistance and preparation method thereof
A technology for low-temperature denitrification and rare earth cerium, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve problems such as narrow active temperature window, endangering the environment and human health, and difficult to accurately control the morphology of catalysts , to achieve the effects of good anti-sulfur poisoning performance, high catalytic reactivity, and excellent anti-sulfur properties
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Embodiment 1
[0040] (1) Weigh 1.736g of Ce(NO 3 ) 3 ·6H 2 O and 0.538g of niobium oxalate were dissolved in 50mL of water, at room temperature, continuously dropwise added 10mol / L NaOH solution under stirring, stirred for 1h, and the final pH of the solution was 12;
[0041] (2) Transfer the formed solution or suspension to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 100°C for 24 hours;
[0042] (3) After the hydrothermal reaction is completed, centrifuge the formed solid, wash the obtained solid with deionized water and ethanol until the pH of the washing solution is 8, then vacuum-dry it at 80°C for 4h, and then dry it in air The samples were prepared by roasting at 400°C for 8 hours;
[0043] (4) Drop tetrabutyl titanate into ethanol under the condition of an ice-water bath and keep stirring, then add the sample prepared above, evaporate the solvent at 100°C, then dry at 120°C for 8h, and then dry in air The rare earth cerium-based low-temperature denitrif...
Embodiment 2
[0046] (1) Weigh 1.736g of Ce(NO 3 ) 3 ·6H 2 O and 0.260g of tin tetrachloride were dissolved in 50mL of water, at room temperature, continuously dropwise added 6mol / L of NaOH solution under stirring, stirred for 1h, and the final pH of the solution was 10;
[0047] (2) Transfer the formed solution or suspension to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 180°C for 24 hours;
[0048] (3) After the hydrothermal reaction is completed, centrifuge the formed solid, wash the obtained solid with deionized water and ethanol until the pH of the washing solution is 8, then vacuum-dry it at 80°C for 4h, and then dry it in air The samples were prepared by roasting at 400°C for 8 hours;
[0049] (4) Drop tetrabutyl titanate into ethanol under the condition of an ice-water bath and keep stirring, then add the sample prepared above, evaporate the solvent at 100°C, dry at 120°C for 8h, and then place it in the air at 500°C The rare earth cerium-based low-tempe...
Embodiment 3
[0052] (1) Weigh 1.736g of Ce(NO 3 ) 3 ·6H 2 O and 0.403g of Fe(NO 3 ) 3 9H 2 O was dissolved in 50mL of water, at room temperature, continuously dropwise added 8mol / L NaOH solution under stirring, and stirred for 1h, the final pH of the solution was 11;
[0053] (2) Transfer the formed solution or suspension to a hydrothermal reaction kettle, and conduct a hydrothermal reaction at 180°C for 24 hours;
[0054] (3) After the hydrothermal reaction is completed, centrifuge the formed solid, wash the obtained solid with deionized water and ethanol until the pH of the washing solution is 8, then dry at 80°C for 4h, and then dry it in air at 400°C The sample was prepared by roasting at ℃ for 8 hours;
[0055] (4) Drop tetrabutyl titanate into ethanol under the condition of an ice-water bath and keep stirring, then add the sample prepared above, evaporate the solvent at 100°C, dry at 120°C for 8h, and then place it in the air at 500°C The rare earth cerium-based low-temperatur...
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