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Cellular activated carbon-based denitration catalyst as well as preparation and application thereof

A technology of honeycomb activated carbon and denitration catalyst, which is applied to the honeycomb activated carbon-based denitration catalyst and the fields of preparation and application thereof, can solve the problems of low porosity of honeycomb cordierite, low carbon content of honeycomb carbon, and no denitration performance has been investigated, and achieve pore size. The effect of developed structure, small bed pressure drop and high specific surface area

Inactive Publication Date: 2011-06-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, MnOx / charcoal-coated cordierite catalyst, although it exhibits good low-temperature SCR activity at ~150°C, is easily poisoned by SO2 in flue gas, and due to The porosity of honeycomb cordierite is low, and the carbon content of honeycomb carbon prepared by coating method is lower than 20wt%.
Honeycomb MnOx-Fe2O3-V2O5 catalyst (CN1792455A, 2006) has a denitration rate of 95% at 250oC, but the denitrification performance between 100 and 200℃ has not been investigated

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] According to the mass ratio of activated carbon powder: phenolic resin: methyl cellulose: water = 100: 25: 5: 160, add it into the kneader, mix it, and roll it out to make plastic mud; In the extrusion molding machine, molding is carried out under the molding pressure of 8MPa to obtain a wet honeycomb body; o C and 110 o C drying for 5 hours and 6 hours, then use nitrogen or argon as protective gas, heat up to 250°C at a heating rate of 2-5°C / min, and cure at this temperature for 0.5 hours, and finally heat up at the same rate to Carbonize at 700°C for 3 hours to prepare a honeycomb activated carbon carrier. Weigh 0.32g of manganese acetate and 0.60g of cerium nitrate into 10mL of water to form a solution, impregnate the honeycomb activated carbon carrier for 2 to 12 hours by equal volume method, dry, and then place in an inert atmosphere for 400 o C calcined for 6 hours, and in air at 160 o C oxidation for 2 hours to obtain MnO, CeO 2 Honeycomb activated carbon-ba...

example 2

[0025] According to the mass ratio of activated carbon powder: phenolic resin: methyl cellulose: water = 100: 25: 5: 160, add it into the kneader, mix it, and roll it out to make plastic mud; In the extrusion molding machine, molding is carried out under the molding pressure of 8MPa to obtain a wet honeycomb body; o C and 110 o C drying for 5 hours and 6 hours, then use nitrogen or argon as protective gas, heat up to 250°C at a heating rate of 2-5°C / min, and cure at this temperature for 1 hour, and finally heat up at the same rate to Carbonize at 700°C for 3 hours to prepare a honeycomb activated carbon carrier. Weigh 0.96g of manganese acetate and 0.45g of cerium nitrate and add them into 10mL of water to form a solution, impregnate the honeycomb-shaped activated carbon carrier for 2 to 12 hours by equal volume method, dry, and then place in an inert atmosphere for 400 o C calcined for 6 hours, and in air at 160 o C oxidation for 2 hours to obtain MnO, CeO 2 Honeycomb act...

example 3

[0027] According to the mass ratio of activated carbon powder: phenolic resin: methyl cellulose: water = 100: 25: 3: 140, add it into the kneader, mix it, and roll it out to make plastic mud; In the extrusion molding machine, molding is carried out under the molding pressure of 8MPa to obtain a wet honeycomb body; o C and 110 o C drying for 5 hours and 6 hours, then use nitrogen or argon as protective gas, heat up to 250°C at a heating rate of 2-5°C / min, and cure at this temperature for 0.5 hours, and finally heat up at the same rate to Carbonize at 700°C for 3 hours to prepare a honeycomb activated carbon carrier. Weigh 0.96g of manganese acetate and 0.45g of cerium nitrate and add them into 10mL of water to form a solution, impregnate the honeycomb-shaped activated carbon carrier for 2 to 12 hours by equal volume method, dry, and then place in an inert atmosphere for 400 o C calcined for 6 hours, and in air at 160 o C oxidation for 2 hours to obtain MnO, CeO 2 Honeycomb ...

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Abstract

The invention discloses a catalyst for smoke denitration. The catalyst comprises the following components in percentage by weight: 77-96% of cellular activated carbon carrier, 1.3-6.5% of MnO and 2.4-18.8% of CeO2, wherein the mixture of the MnO and the CeO2 serves as an active component. The preparation method is as follows: mixing activated carbon with an organic binder, a forming auxiliary and water, carrying out vacuum extrusion molding, drying, and carbonizing, thus obtaining the cellular activated carbon carrier; and preparing the catalyst by using an isopknic impregnation method based on a mixed liquid of magnganous nitrate or manganese acetate and cerous nitrate, wherein the mixed liquid serves as an impregnation liquid. The cellular activated carbon-based denitration catalyst has the advantages of high specific surface area of cellular activated carbon, developed pore structure and small bed pressure drop, and when being used in smoke denitration, the cellular activated carbon-based denitration catalyst has high denitration activity at the wide temperature range of 80-200 DEG C.

Description

technical field [0001] The invention belongs to a catalyst for destocking of flue gas and its preparation and use method, in particular to a manganese and cerium catalyst loaded on honeycomb activated carbon and its preparation and use method. Background technique [0002] As we all know, SO x and NO x (Nitrate) is the main substance that causes the greenhouse effect and the formation of acid rain and photochemical smog, and the flue gas of coal-fired power plants emits SO x and NO x main channel. According to Electric Power Technology and Environmental Protection, 2010, 26(2): 1-4 and China Electric Power, 2009, 42(4): 59-62, my country's SO in 1998 and 2005 2 The emissions were 20.91 million tons and 25.49 million tons respectively; in 1995 the national NO x China's emissions were 8 million tons, 15 million tons in 2000, and had grown to 20 million tons in 2010. With the rapid development of industry, SO x and NO x The emissions are also increasing day by day, so h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/56B01D53/86B01J23/34B01J23/10B01J37/02B01J35/04B01J32/00
Inventor 詹亮王艳莉王邓军乔文明凌立成
Owner EAST CHINA UNIV OF SCI & TECH
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