Preparation method of highly active honeycomb SCR catalyst
A kind of SCR catalyst, honeycomb technology, which is applied in the field of preparation of highly active honeycomb SCR catalyst, can solve the problems of complex natural attapulgite composition, adverse effect on catalyst activity, and low activity of SCR catalyst, and achieve stable denitrification efficiency and enhanced denitrification Catalytic activity, wide range of effects
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preparation Embodiment 1
[0030] Put the attapulgite in the nitric acid solution and stir for 1 hour, the mass volume ratio of the attapulgite to the nitric acid solution is 89:1; then filter, wash the attapulgite with desalted water, then roast and cool the attapulgite , the roasting temperature is 400°C, and the roasting time is 2h; after cooling to room temperature, it is ground and passed through a 200-mesh sieve to obtain activated attapulgite; Na in activated attapulgite 2 O content ≤ 0.2%, CaO content ≤ 0.5%, MgO content ≤ 1%; then mix the activated attapulgite with titanium dioxide, ammonium metavanadate, CMC, PEO, ammonia water, glass fiber, cotton pulp and desalted water evenly Mixing is carried out, wherein the volume percentage of ammonia water used is 30%; the mud after mixing is pre-extruded and filtered with a vacuum screw extruder and a steel wire filter, and the extruded material is aged at room temperature for 24 hours; the aged mud is used Extruded by a screw extruder to make a catal...
preparation Embodiment 2
[0032] Put the attapulgite in the nitric acid solution and stir for 2 hours, the mass volume ratio of the attapulgite to the nitric acid solution is 89:1; then filter, wash the attapulgite with desalted water, then roast and cool the attapulgite , the roasting temperature is 200°C, and the roasting time is 4h; after cooling to room temperature, it is ground and passed through a 200-mesh sieve to obtain activated attapulgite; Na in activated attapulgite 2 O content ≤ 0.2%, CaO content ≤ 0.5%, MgO content ≤ 1%; then mix the activated attapulgite with titanium dioxide, ammonium metavanadate, CMC, PEO, ammonia water, glass fiber, cotton pulp and desalted water evenly Mixing is carried out, wherein the volume percentage of ammonia water used is 30%; the mud after mixing is pre-extruded and filtered with a vacuum screw extruder and a steel wire filter, and the extruded material is aged at room temperature for 12 hours; the aged mud is used Extruded by a screw extruder to make a cata...
preparation Embodiment 3
[0034]Put the attapulgite in the nitric acid solution and stir for 1.5h, the mass volume ratio of the attapulgite to the nitric acid solution is 89:1; then filter, wash the attapulgite with demineralized water, and then roast the attapulgite and Cooling, roasting temperature is 300 ℃, roasting time is 2h; after cooling to room temperature, grind, and pass through a 600 mesh sieve to obtain activated attapulgite; Na in activated attapulgite 2 O content ≤ 0.2%, CaO content ≤ 0.5%, MgO content ≤ 1%; then mix the activated attapulgite with titanium dioxide, ammonium metavanadate, CMC, PEO, ammonia water, glass fiber, cotton pulp and desalted water evenly Mixing is carried out, wherein the volume percentage of ammonia water used is 30%; the mud after mixing is pre-extruded and filtered by a vacuum screw extruder and a steel wire filter, and the extruded material is aged at room temperature for 20 hours; the aged mud is used Extruded by a screw extruder to make a catalyst green body...
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