Low temperature SCR denitration catalyst taking organic metal framework as carrier and preparation method thereof

A denitration catalyst, catalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of catalyst pollution poisoning, catalyst sintering, difficult boiler matching and other problems , to achieve the effects of alleviating poisoning and clogging, improving dispersion performance, and avoiding preheating and energy consumption

Active Publication Date: 2010-12-22
中建中环新能源有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the flue gas has not been treated for desulfurization and dust removal, such an arrangement will cause the catalyst to be exposed to high concentrations of soot and SO 2 The scouring, wear and pollution poisoning of impurities in the fly ash, the high temperature of the flue gas will also cause the catalyst to sinter, deactivate, or generate NH 3 Oxidized to NO side reactions, etc.
In addition, for the existing boilers in our country, the economizer, the air preheater and the boiler are generally integ

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Disperse 10g of carrier MIL-101 in 1.15mL of 1mol / L manganese nitrate or manganese sulfate aqueous solution, stir mechanically for 1-2 hours to make it evenly mixed, put it in a drying oven after standing for 1 hour, and bake at 100°C Dry overnight, then bake at 300°C for 3 hours in an atmosphere of nitrogen or argon. After natural cooling, grind and sieve the part with a diameter of 40 to 60 mesh as a low-temperature denitration catalyst, wherein the manganese loading is 1wt.%.

Embodiment 2

[0023] Disperse 10g of carrier MIL-101 in 3.13mL of 1mol / L ferric nitrate or ferric sulfate solution, stir mechanically for 1-2 hours to make it evenly mixed, put it in a drying oven after standing for 2 hours, and bake at 100°C Dry overnight, then bake at 350°C for 4 hours in an atmosphere of nitrogen or argon. After natural cooling, grind and sieve the part with a diameter of 40-60 mesh as a low-temperature denitration catalyst, wherein the iron loading is 5wt.%.

Embodiment 3

[0025] Disperse 10g of carrier MIL-101 in 12.57mL of 1mol / L copper nitrate solution, stir mechanically for 1-2 hours to make it evenly mixed, put it in a drying oven after standing for 3 hours, and dry it at 110°C overnight. Then bake at 350° C. for 5 hours in an atmosphere of nitrogen or argon, and after natural cooling, grind and screen the part with a diameter of 40 to 60 mesh as a low-temperature denitration catalyst, wherein the copper loading is 10wt.%.

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Abstract

The invention relates to a low temperature SCR denitration catalyst taking an organic metal framework as a carrier and a preparation method thereof, belonging to fields of an air pollution regulation technology and an environmental protection catalytic material. The preparation method comprises the following steps: loading oxides of one or more metal elements of Mn, Fe, Cu, V and Ce on an MOFs catalyst carrier to serve as effective components by an immersion method; and obtaining the catalyst by drying, calcinating and sieving, wherein in terms of the total mass of the catalyst, the content of the loaded active metal oxides is 1-20% by mass and the working temperature of the catalyst is 80-200 DEG C. The catalyst has larger specific area surface, higher low temperature catalytic activity, good denitration effect and wide industrial application prospect in the flue gas denitration process.

Description

technical field [0001] The invention relates to a low-temperature SCR denitrification catalyst with metal-organic frameworks (MOFs) as a carrier and a preparation method thereof, belonging to the fields of air pollution control technology and environmental protection catalytic materials. Background technique [0002] Nitrogen oxides (NOx) are one of the main air pollutants that cause a series of problems such as acid rain and photochemical smog that destroy the earth's ecological environment, and are also the focus and difficulty of atmospheric environmental protection. A large number of methods have been used to study the reduction of nitrogen oxide emissions, among which, NH 3 Selective Catalytic Reduction (SCR) as a reducing agent is currently the most effective method for removing NOx from stationary sources in industry. [0003] Commercial SCR catalysts are mostly vanadium-based catalysts, such as V 2 o 5 / TiO 2 or V 2 o 5 -WO 3 / TiO 2 Wait. The active temperat...

Claims

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Application Information

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IPC IPC(8): B01J31/12B01J31/36B01J31/32B01J31/28B01D53/86B01D53/56
Inventor 卢作基徐晓亮黄丽娜
Owner 中建中环新能源有限公司
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