SCR (Selective Catalytic Reduction) denitration catalyst and preparation method thereof
A denitration catalyst and catalyst technology, which are applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problem that the control of active component loading is prone to deviation accumulation, large deviation between content and design value, and long preparation process. and other problems, to achieve the effect of shortening the preparation time, stable slurry properties, and large coating load
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Embodiment 1
[0029] Rinse two cordierite carriers of 200 mesh and 400 mesh 150mm*150mm*100mm with deionized water, and then dry them at 120°C for 5 hours for later use. Mix 2000g of anatase titanium dioxide, 200g of pseudoboehmite, and 200g of cerium-zirconium solid solution powder, and then control the average particle size at 5.6um after gas crushing; add 120g of ammonium tungstate (calculated as tungsten trioxide ), 7.2g of vanadium oxalate (calculated as vanadium pentoxide) and 9600g of deionized water, aged for 3h and then emulsified for 30min; the solid content of the prepared liquid was 20%, the viscosity was 235mPa·S, and the pH value was 2.3. The prepared slurry was coated on the surface of the carrier by negative pressure coating and positive pressure extraction, dried at 120°C for 4 hours, and then placed in a muffle furnace to raise the temperature to 550°C at a rate of 2°C / min Calcined for 5 hours to obtain the finished coated SCR denitration catalyst. Its product data is as ...
Embodiment 2
[0032] Rinse two cordierite carriers of 200 mesh and 400 mesh 150mm*150mm*100mm with deionized water, and then dry them at 120°C for 5 hours for later use. Mix 2000g of anatase titanium dioxide, 600g of pseudoboehmite, and 200g of cerium-zirconium solid solution powder, and then control the average particle size at 10.2um after gas crushing; add 120g of ammonium tungstate (calculated as tungsten trioxide ), 7.2g of vanadium oxalate (calculated as vanadium pentoxide) and 9600g of deionized water, aged for 3h and then emulsified for 30min; the solid content of the prepared liquid was 22.6%, the viscosity was 3548mPa·S, and the pH value was 3.5. The prepared slurry was coated on the surface of the carrier by negative pressure coating and positive pressure extraction, dried at 120°C for 4 hours, and then placed in a muffle furnace to raise the temperature to 550°C at a rate of 2°C / min Calcined for 5 hours to obtain the finished coated SCR denitration catalyst. Its product data is...
Embodiment 3
[0036]Rinse two cordierite carriers of 200 mesh and 400 mesh 150mm*150mm*100mm with deionized water, and then dry them at 120°C for 5 hours for later use. Mix 2000g of anatase titanium dioxide, 200g of pseudoboehmite, and 400g of cerium-zirconium solid solution powder, and control the average particle size at 9.7um after gas crushing; add 120g of ammonium tungstate (calculated as tungsten trioxide) to the mixed powder ), 7.2g of vanadium oxalate (calculated as vanadium pentoxide) and 9600g of deionized water, aged for 3h and then emulsified for 30min; the solid content of the prepared liquid was 21.3%, the viscosity was 1125mPa·S, and the pH value was 3.5. The prepared slurry was coated on the surface of the carrier by negative pressure coating and positive pressure extraction, dried at 120°C for 4 hours, and then placed in a muffle furnace to raise the temperature to 550°C at a rate of 2°C / min Calcined for 5 hours to obtain the finished coated SCR denitration catalyst. Its p...
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