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SCR method for removal of NOx by utilizing metal-organic frameworks as catalyst

A technology of metal-organic frameworks and nitrogen oxides, applied in chemical instruments and methods, separation of dispersed particles, separation methods, etc., can solve problems such as poor anti-sulfur performance

Active Publication Date: 2013-12-04
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem that existing denitrification catalysts contain vanadium, an active component that is harmful to the human body and the environment, and generally have poor sulfur resistance, the present invention aims to develop a metal organic framework material as a denitration catalyst, using NH 3 Selective Catalytic Reduction of NO x application method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Example 1, the MIL-100 (Fe) catalyst is packed in a fixed bed reactor, and experimental research shows that under simulated flue gas conditions, the space velocity is maintained at 30000h -1 , NO x =NH 3 =1000ppm, 4%O 2 , at 270°C, the denitrification activity can reach 90%.

Embodiment 2

[0014] Example 2, the MIL-53 (Fe) catalyst is packed in a fixed-bed reactor, and the space velocity is maintained at 35000h under simulated flue gas conditions -1 , NO x =NH 3 =600ppm, 5%O 2 , the experimental research shows that at 275 ℃, the denitrification activity can reach more than 80%.

Embodiment 3

[0015] Example 3, the ZIF-100 (Co) catalyst is packed in a fixed bed reactor, and the space velocity is kept at 20000h under simulated flue gas conditions -1 , NO x =NH 3 =400ppm, 3%O 2 , the experimental research shows that at 285 ℃, the denitrification activity can reach more than 80%.

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PUM

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Abstract

The invention discloses an SCR (selective catalytic reduction) method for removal of NOx by utilizing metal-organic frameworks (MOFs) as the catalyst. The MOFs are used as the catalyst, and NH3 is utilized for removal of NOx with the SCR method, and catalytic denitration application with sulfur resistance is implemented with the flue gas conditional ranges of 400-1,000 ppm of NOx, 400-1,000 ppm of NH3, 3-5 percent of O2, 100-500 ppm of SO2, 10,000 h<-1>-40,000 h<-1> of air speed and 250-350 DEG C of temperature, and the denitration activity of the catalyst can reach more than 80%. Based on that the MOFs have the characteristics of large specific surface area, orderly dispersed metal active sites and three-dimensional transparent pore structure, catalyst poisoning and inactivation caused by deposition of sulfate in the reaction process can be effectively delayed, so that catalytic reduction of NOx can be efficiently and continuously realized.

Description

technical field [0001] The invention belongs to the field of flue gas catalytic denitrification, and relates to the use of metal organic framework materials as catalysts for selective catalytic reduction to remove nitrogen oxides. Background technique [0002] Nitrogen oxides (NO x ) is one of the important air pollutants, which not only endangers the growth of animals and plants, destroys the ozone layer, but also causes acid rain, greenhouse effect and photochemical smog. Therefore, strengthening the control of nitrogen oxide emissions has been included in the "Twelfth Five-Year Plan" outline, and reducing nitrogen oxide emissions has become the focus of attention at this stage. [0003] At present, the flue gas denitrification technology at home and abroad is mainly selective catalytic reduction (SCR). The main commercially used V 2 o 5 / TiO 2 and V 2 o 5 -WO 3 (MoO 3 ) / TiO 2 The catalyst has an optimal activity temperature window between 300 and 400°C, and has ...

Claims

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Application Information

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IPC IPC(8): B01D53/90B01D53/56
Inventor 全燮汪鹏赵慧敏陈硕
Owner DALIAN UNIV OF TECH
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