A CO reduction low-temperature denitrification catalyst zif-67-me/cuo x And its preparation method and application
A technology of ZIF-67 and zif-67-me, which is applied in the field of catalytic materials, can solve the problems of poor thermal stability and chemical stability, improve effective utilization, improve dispersion and uniformity, and improve low-temperature smoke The effect of gas denitrification rate
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Embodiment 1
[0048] Weigh 0.6g cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O), dissolved in 4ml ultrapure water, stirred until completely dissolved; weighed 7.3g of 2-methylimidazole dissolved in 26ml ultrapure water, ultrasonicated until completely dissolved; mixed the two solutions, added 0.22g HKUST-1 And 0.75g PVP, and stirred for 6h. The solids separated by filtration were washed alternately with ultrapure water and ethanol three times, dried in an oven at 80°C for 12 hours, and then kept at 300°C for 1 hour in a slightly CO reducing atmosphere to obtain ZIF-67-Co @CuO x powder.
[0049] The catalytic activity test method is as follows: put the catalyst into a fixed bed of quartz tube, heat it to 150°C with an electric furnace, keep it for 2 hours, and remove the crystal water in the catalyst. The simulated flue gas and CO are passed into the quartz tube, and the gas composition is CO, NO, N 2 , O 2 . Among them, the concentration of CO is 960ppm, the concentration of NO is ...
Embodiment 2
[0051] Weigh 0.6g cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) and 0.129g aluminum nitrate nonahydrate (Al(NO 3 ) 3 9H 2 0), dissolved in 4ml ultrapure water, stirred until completely dissolved; weighed 7.3g of 2-methylimidazole and dissolved in 26ml ultrapure water, ultrasonicated until completely dissolved; the two solutions were mixed, and 0.22g HKUST- 1 and 0.75g PVP, and stirred for 6h. Filter the separated solid, then alternately wash three times with ultrapure water and ethanol, put it in an oven and dry it at 80°C for 12h, then keep it at 300°C in a slightly CO reducing atmosphere for 1h, and finally obtain ZIF-67-Al @CuO x powder.
[0052] The catalytic activity test method is as follows: put the catalyst into a fixed bed of quartz tube, heat it to 150°C with an electric furnace, keep it for 2 hours, and remove the crystal water in the catalyst. The simulated flue gas and CO are passed into the quartz tube, and the gas composition is CO, NO, N 2 , O 2 . ...
Embodiment 3
[0054] Weigh cobalt nitrate hexahydrate (Co(NO 3 ) 2 ·6H 2 O) 0.6g and 75μl manganese nitrate solution (Mn(NO 3 ) 2 ), dissolved in 4ml of ultrapure water, stirred until completely dissolved; weighed 7.3g of 2-methylimidazole and dissolved in 26ml of ultrapure water, ultrasonicated until completely dissolved; mixed the two solutions, added 0.22g of HKUST-1 And 0.75g PVP, and stirred for 6h. Filter and separate the solid, then alternately wash three times with ultrapure water and ethanol, put it in an oven and dry at 80°C for 12h, then keep it at 300°C for 1h in a slightly CO reducing atmosphere, and finally obtain ZIF-67-Mn @CuO x powder.
[0055] The catalytic activity test method is as follows: put the catalyst into a fixed bed of quartz tube, heat it to 150°C with an electric furnace, keep it for 2 hours, and remove the crystal water in the catalyst. The simulated flue gas and CO are passed into the quartz tube, and the gas composition is CO, NO, N 2 , O 2 . The c...
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