Honeycomb catalyst for catalytic incineration of gas containing sulfur and preparation method thereof
A honeycomb catalyst and catalytic incineration technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of large air resistance in the catalytic incineration reactor bed Solve the problems of poor sulfur resistance and low operating space speed, and achieve the effect of low cost, high operating space speed and excellent performance
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Embodiment 1
[0020] Measure 50 mL of tetrabutyl titanate into a 500 mL beaker, add 50 mL of absolute ethanol under electromagnetic stirring, and stir evenly at room temperature to prepare solution A. Prepare 100 mL of solution B with volume ratios of 25%, 5%, 10% and 60% of glacial acetic acid, hydrochloric acid, distilled water and absolute ethanol, respectively. Solution A was added dropwise to solution B under electromagnetic stirring, and a light yellow sol was prepared after fully stirring. Boil the honeycomb ceramic carrier in 5% nitric acid solution for 30 minutes, take it out, wash it with distilled water for 5 times, and dry it. After immersing the processed honeycomb ceramics in the sol for 2 minutes, take it out slowly, dry it at 105°C, then bake it in a muffle furnace at 500°C for 2 hours, cool it down to room temperature naturally, repeat the above steps 6 times, and obtain the desired titanium dioxide coating thick carrier.
Embodiment 2
[0027] With 460g of titanium dioxide powder, 8g of methyl cellulose powder and 41.7g of lanthanum nitrate (La(NO 3 ) 3 ·6H 2 O) Mix and grind in a ball mill for 45min, add bismuth nitrate solution (46.4g of Bi(NO 3 ) 3 ·5H 2 O dissolved in 70mL of 10% dilute nitric acid), continue to grind for 15min, and add distilled water to make the ground material evenly mixed into a paste with appropriate hardness, put the paste into a honeycomb mold for extrusion molding, dry at 60°C for 5h and Dry at 105°C for 6h, bake at 250°C for 8h and 500°C for 10h. The specific surface area of the prepared catalyst is 1170m 2 / m 3 , the hole spacing is 3.0mm, and the wall thickness is 0.5mm. The composition of the catalyst is La 2 o 3 3.2% (La 2.7%), Bi 2 o 3 4.5% (Bi 4.0%), TiO 2 92.8%, La / Bi molar ratio is about 1:1.
Embodiment 3
[0029] The titanium dioxide powder of 450g, the bismuth oxide powder of 44g, the copper oxide powder of 15g, the polyacrylamide of 6g and the active carbon powder of 2g are mixed and ground 45min in ball mill, while grinding, slowly add ethanolamine solution (ethanolamine and distilled water volume ratio is 1:5) to make a paste with appropriate hardness, put the paste into a honeycomb mold for extrusion molding, dry at 70°C for 7 hours and 110°C for 4 hours, bake at 270°C for 8 hours and bake at 480°C for 10 hours. The specific surface area of the prepared catalyst is 920m 2 / m 3 , the hole spacing is 3.0mm, and the wall thickness is 0.5mm. The composition of the catalyst is CuO 2.9%, Bi 2 o 3 8.6%, TiO 2 88.5%, the Cu / Bi molar ratio is about 1:1.
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