Low-temperature flat plate type denitration catalyst and preparation method thereof

A denitration catalyst, flat-plate technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical elements of heterogeneous catalysts, etc., can solve the problems of low denitration efficiency, easy sulfur poisoning, poor wear resistance, etc. The effect of good wear resistance, good sulfur poisoning resistance and excellent NOX removal effect

Active Publication Date: 2017-01-04
DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a low-temperature flat-plate denitration catalyst and its preparation method for the problems of low denitrification efficiency, poor wear resistance, and easy sulfur poisoning of the flat-plate low-temperature denitrification catalyst; the catalyst has excellent NO X Excellent removal effect, excellent wear resistance and sulfur poisoning resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 9976g TiO 2 , 32gSiO 2Stir evenly to obtain a uniform dry material of titanium silicon; weigh 256.02g tin tetrachloride, 32.65g samarium nitrate hexahydrate, 67.57g50% manganese nitrate solution, dissolve it in a 2.5% sulfamic acid solution, and mix to obtain Saturated tin, samarium and manganese solution A; Weigh 51.3g of cerium nitrate and 32.76g of ammonium tungstate, and dissolve them in 1% citric acid aqueous solution to obtain saturated cerium tungsten solution B; Mix saturated solution of A and saturated solution of B evenly, add 300g of ammonia water with a mass fraction of 25%, and 600g of absolute ethanol was added to the solution, stirred evenly, and kept at 35°C for 30min to obtain a mixed solution C. Add the mixed solution C to the uniformly mixed titanium-silicon dry material, stir evenly, and then add 56g of carbon powder, 12g of aminocellulose and 35g of sodium carboxymethylcellulose, and 236.5g of glass fibers, the diameter of which is 0.5mm , l...

Embodiment 2

[0029] Weigh 9990g TiO 2 , 10gSiO 2 Stir evenly to obtain a uniform dry material of titanium silicon; weigh 156.02g tin tetrachloride, 0.65g samarium nitrate hexahydrate, and 37.07g50% manganese nitrate solution, dissolve it in a 0.5% sulfamic acid solution, and mix to obtain Tin, samarium and manganese saturated solution A; weigh 13.12g of ammonium metavanadate and dissolve it in a citric acid solution with a mass concentration of 2% to obtain a vanadium saturated solution B; mix the saturated solution of A and the saturated solution of B evenly, and add 100g of The fraction is 15% ammonia water, and 1000g of absolute ethanol is added to the solution, after stirring evenly, it is kept at 35°C for 30min to obtain a mixed solution C. Add the mixed liquid C to the evenly mixed titanium-silicon dry material, stir evenly, add 0.5g carbon powder, 0.5g aminocellulose, and 9g glass fiber (diameter 0.01mm, length 1cm), stir evenly, and cut into A cylinder with a diameter of 3mm and ...

Embodiment 3

[0032] Weigh 9090.9g TiO 2 , 909.1gSiO 2 Stir evenly to obtain a uniform dry material of titanium and silicon; weigh 214.69g of stannous oxalate, 40.94g of samarium chloride, and 2265.55g of manganese chloride, dissolve them in a hydrochloric acid solution with a mass concentration of 10%, and mix them to obtain saturated tin, samarium and manganese Solution A; 1581.23g of cerium oxalate was weighed, and it was dissolved in a 1% hydrochloric acid solution in mass concentration to obtain a cerium saturated solution B; A saturated solution and B saturated solution were mixed uniformly, and 80g of mass fraction was added to be 25% ammonia water, Add 800 g of absolute ethanol to the solution, stir evenly, and keep warm at 50° C. for 30 minutes to obtain a mixed solution C. Add the mixed solution C to the evenly mixed titanium-silicon dry material, stir evenly, add 65.2g sucrose powder, 130.4g carboxymethyl cellulose, and 1304.3g glass fiber in turn, with a diameter of 1mm and a l...

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Abstract

The invention discloses a low-temperature flat plate type denitration catalyst and a preparation method thereof. According to the catalyst, tin-samarium-manganese compound oxide serves as the catalyst active component, one or more of vanadium, cerium, lanthanum, nickel, zirconium, copper, molybdenum and tungsten serve as the promoters, TiO2 and SiO2 serve as the carriers, glass fiber, binder, lubricant and pore forming material are added as functional auxiliaries, and the uniform catalyst is prepared and smeared and spread on a supporting body; the mass ratio of the carriers to the active component to the promoters to the functional auxiliaries in catalyst paste is 100:(1-18):(0.1-10):(0.1-15). The prepared catalyst has an excellent NOX removal effect in smoke at 70-280 DEG C, has good wear resistance, and is simple in preparation process and low in cost. The catalyst is suitable for low-temperature denitration of coal-fired power plants, garbage incinerators, ceramic kilns, cement kilns and the like and has quite good application prospects.

Description

technical field [0001] The invention relates to a low-temperature plate-type denitrification catalyst and a preparation method thereof, belonging to the fields of environment-friendly catalytic materials and air pollution control. Background technique [0002] Nitrogen oxides have caused a series of problems such as acid rain, smog, and photochemical smog, posing a huge threat to people's living environment and life and health. For this reason, my country promulgated the "Emission Standards of Air Pollutants for Thermal Power Plants" in 2011, which stipulated that NO in the flue gas of thermal power plants X The maximum emission limit is 100mg / m 3 , with the further deterioration of the environment, the stricter NO X Emission standards are about to be fully implemented, in order to meet the NO X To meet the emission requirements, Selective Catalytic Reduction (SCR) technology must be used. At present, the most widely used commercial catalyst is vanadium-titanium series. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/34B01J23/889
CPCB01J23/002B01J23/34B01J23/8892B01J2523/30B01J2523/3737B01J2523/43B01J2523/72
Inventor 纵宇浩陈志平王虎王晓伟黄力李倩张捷
Owner DATANG NANJING ENVIRONMENTAL PROTECTION TECH
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