Low-temperature low-SO2-oxidation-rate honeycomb denitration catalyst and preparation method thereof

A denitrification catalyst and oxidation rate technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of high conversion rate, high oxidation rate, difficult industrial application, etc., and achieve strong anti-SO2 ability, Low SO2 oxidation rate and strong water resistance

Inactive Publication Date: 2017-06-09
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of cerium manganese as the active component, it is easy to be poisoned and deactivated, and SO 2 High conversion rate, difficult for industrial application
Most of the existing low-temperature denitrification catalysts on the market use the active componen...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] a. Weigh 41.56kg of oxalic acid dihydrate, add 100.0L of water to dissolve, heat to 90°C, add 19.28kg of ammonium metavanadate, stir and dissolve, add 63.77kg of ammonium paratungstate, 2.45kg of ammonium molybdate, and 0.64kg of magnesium nitrate hexahydrate , Ammonium fluoride 1.06kg, stir, make it fully react, be recorded as active component solution A.

[0028] b. Weigh 626.3kg of anatase-type titanium dioxide, 6.81kg of binder hydroxypropyl methylcellulose and 7.76kg of pore-forming agent polyethylene oxide and add them to the mixer, add 90.0L of water and 30.0L of ammonia solution, Stir at high speed for 3 minutes, slowly add active component solution A, stir at high speed for 30 minutes, add forming aids pulp fiber 1.0kg, glass fiber 30.0kg, ethanolamine 12.14kg, lactic acid 11.31kg, add the remaining 268.4kg of titanium dioxide to the mixer In the middle, stir and mix at high speed for 60 minutes, adjust the pH to 8.0 with ammonia water, control the water conten...

Embodiment 2

[0031] a. Weigh 47.27kg of oxalic acid dihydrate, add 120.0L of water to dissolve, heat to 90°C, add 22.14kg of ammonium metavanadate, stir and dissolve, add 50.63kg of ammonium metatungstate, 12.23kg of ammonium molybdate, triammonium phosphate 10.50kg, 2.36kg of magnesium nitrate hexahydrate, stir, make it react fully, be recorded as active component solution A.

[0032] b. Weigh 600.0kg of anatase-type titanium dioxide, 6.53kg of binder hydroxypropyl methylcellulose and 7.44kg of pore-forming agent polyethylene oxide and add them to the mixer, add 80.0L of water and 35.0L of ammonia solution, Stir at high speed for 3 minutes, slowly add the active component solution A, stir at high speed for 30 minutes, add 2.0kg of pulp fiber, 50.0kg of glass fiber, 11.64kg of ethanolamine, and 10.65kg of lactic acid as forming aids, stir at high speed for 10 minutes, and add the remaining 257.5kg of titanium dioxide Add it into the mixer, stir and mix at high speed for 60 minutes, adjust ...

Embodiment 3

[0035] a. Weigh 49.27kg of oxalic acid dihydrate, add 140.0L of water to dissolve, heat to 80°C, add 26.14kg of ammonium metavanadate, stir and dissolve, add 41.26kg of ammonium paratungstate, 23.59kg of ammonium molybdate, and 3.46kg of magnesium nitrate hexahydrate , triammonium phosphate 6.50kg, stannous sulfate 1.43kg, stir, make it fully react, be recorded as active component solution A.

[0036] b. Weigh 594.0kg of anatase-type titanium dioxide, 6.46kg of binder hydroxypropyl methylcellulose and 7.35kg of pore-forming agent polyethylene oxide and add them to the mixer, add 70.0L of water and 40.0L of ammonia solution, Stir at high speed for 10 minutes, slowly add the active component solution A, stir at high speed for 30 minutes, add 5.0kg of pulp fiber, 50.0kg of glass fiber, 11.51kg of ethanolamine, and 10.72kg of lactic acid as forming aids, stir at high speed for 20 minutes, and add the remaining 254.0kg of titanium dioxide Add it into the mixer, stir and mix at high...

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PUM

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Abstract

The invention discloses a low-temperature low-SO2-oxidation-rate honeycomb denitration catalyst and a preparation method thereof. The catalyst is prepared from, by mass, 1-5% of V2O5, 0.01-6% of WO3, 0.01-10% of MoO3, 0.01-0.5% of MgO, 3-6% of glass fibers, 66.5-95.96% of TiO2 and one or more of 0.01-1% of B2O3, 0.01-1% of F, 0.01-2% of P2O5, 0.01-1% of SnO2 and 0.01-1% of Sb2O3. Anatase type titanium dioxide serves as a carrier, V2O5 serves as an active center, and auxiliary agents including MgO, B2O3, F, SnO2, P2O5, Sb2O3 and the like are added to enhance synergistic effects among the active center, the auxiliary agents and the carrier to realize preparation of the low-temperature low-SO2-oxidation-rate honeycomb denitration catalyst. Compared with existing industrial V2O5-WO3-TiO2 catalysts, the denitration catalyst prepared according to the method has advantages of wide operating temperature window, high denitration efficiency, low SO2 oxidation rate, high water resistance, less proneness to hole blockage, long service life and the like and is especially suitable for low-temperature conditions (200-300 DEG C).

Description

technical field [0001] The invention relates to a low-temperature low-SO 2 Oxidation rate honeycomb denitration catalyst and preparation method thereof. Background technique [0002] According to the National Emission Ceilings Directive (NECD) issued by the European Union, it is pointed out that NO x It is the main atmospheric environmental pollutant, which not only brings great harm to human health, but also causes irreparable impact on the environment, such as causing greenhouse effect, ozone layer destruction, photochemical smog and acid rain. Therefore, most countries have promulgated corresponding bills to limit industrial NO x emissions. [0003] "During the 12th Five-Year Plan", my country launched a large number of NH in coal-fired power plants 3 -SCR denitrification project effectively suppresses NO in coal-fired power plants x emissions. In addition to coal-fired power plants, there are many industrial combustion flue gases in my country, such as iron and s...

Claims

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Application Information

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IPC IPC(8): B01J23/888B01J27/138B01J27/199B01D53/90B01D53/56
CPCB01J23/888B01D53/8628B01D53/90B01D2251/2062B01D2255/2047B01D2255/20707B01D2255/20723B01D2255/20769B01D2255/20776B01D2255/2094B01D2255/2098B01J27/138B01J27/199
Inventor 唐志诚张国栋韩维亮
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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