Shaped coal-based SO2 and NO adsorption catalyst and preparation method thereof
A catalyst, coal-based technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of high cost and increased desulfurization cost, achieve higher power, achieve economic and environmental win-win, source wide range of effects
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Embodiment 1
[0025] The lignite is crushed, ground, and sieved to obtain 200-mesh particles, and a certain amount of lignite powder is put into a mixer, and a 20% aqueous solution of sodium nitrohumate activated by nitric acid, dextrin and graphite are added to stir, so that The lignite content is 75wt%, the binder sodium nitrohumate content is 20wt%, the pore-forming agent dextrin content is 4.5wt%, and the lubricant graphite content is 0.5wt%. Stir and mix at a constant temperature of 25°C for about 0.5 hours, then add water to adjust to an appropriate viscosity, and then extrude into strands. The extruded precursor body is dried in an oven at 120°C for 2 hours. After drying, the particle size of the precursor embryo body for extrusion molding is ∮2mm, and then it is passed through a mixture containing 20%-40%H 2 O and 2%O 2 N 2 The mixed gas is activated and modified for 1-2h. Finally, the prepared adsorption catalyst is cut into columnar particles according to the length being 2-3 t...
Embodiment 2
[0027] The powdered semi-coke is further crushed, ground, and sieved to obtain 160-mesh particles. A certain amount of powdered semi-coke powder is put into a blender, and a 30% concentration of potassium humate aqueous solution, starch and tung oil are added to stir, so that The powdery semi-coke content is 64wt%, the binder potassium humate content is 30wt%, the pore-forming agent starch content is 5.2wt%, and the lubricant tung oil content is 0.8wt%. Stir and mix at room temperature for about 0.6 hours, then add water to adjust to an appropriate viscosity, and then extrude and shape the precursor body after extrusion molding at 200° C. for 1.5 hours. After drying, the particle size of the precursor body for extrusion molding is ∮4mm, and it is passed through a mixture containing 10%-30%H 2 O and 4%O 2 N 2 The mixed gas is activated and modified for 1-1.5h. Finally, the prepared catalyst is cut into columnar particles according to the length being 2-3 times of the particl...
Embodiment 3
[0029] The lignite and powdered semi-coke (mass ratio 1:1) are crushed, ground and sieved to obtain 200-mesh particles, a certain amount of the above powder is put into a mixer, and a 20% aqueous solution of nitrohumic acid zinc is added , dextrin and graphite, so that the content of lignite and powdery semi-coke is 70wt%, the content of binder nitrohumic acid zinc is 25wt%, the content of pore-forming agent dextrin is 4.3wt%, and the content of lubricant graphite is 0.7 wt%. Stir and mix the raw material pulverized coal or powdery semi-coke at a constant temperature of 30°C for about 0.4 hours, then add water to adjust to an appropriate viscosity, and then roll into balls to shape the precursor body after rolling into a ball and dry it in an oven at 100°C for 2 hours . After drying, the particle size of the precursor embryo body for rolling ball forming is ∮3mm, and it is passed at 680°C with 15%-35%H 2 O and 3%O 2 N 2 The mixed gas is activated and modified for 1-1.5h. ...
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