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Method for removing sulfur and nitric oxides from flue gas

An oxide and inorganic oxide technology, applied in the field of removing sulfur and nitrogen oxides in flue gas, can solve the problems of ecological environment damage to human health, unsatisfactory results, etc., and achieve the effect of good regeneration stability

Active Publication Date: 2012-08-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These harmful gases cause serious damage to the ecological environment and human health
[0003] At present, the SOx emission control technology in the world is relatively mature. Although a series of researches have been carried out at home and abroad on the NOx emission control, the results are still not satisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0058] Adsorbents suitable for use in the methods provided by the invention and methods for their preparation are described.

[0059] Raw materials: silica carrier, spherical, with an average particle size of 1.22 mm, product of Changling Catalyst Factory; Mg(NO 3 ) 2 , Cr(NO 3 ) 3 , La(NO 3 ) 3 All are products of Beijing Chemical Plant.

[0060] Preparation method: 263 grams of Cr(NO 3 ) 3 Dissolve 1 liter of solution L1 with deionized water, and dissolve 123 grams of La(NO 3 ) 3 Dissolve 592 g of Mg(NO 3 ) 2 The solution was dissolved in deionized water to make 1 liter of solution L3. Sequentially impregnate 1000 g of SiO with L1, L2, L3 2 Carrier for 2 hours, dried at 110°C for 12 hours after each impregnation, and calcined at 950°C for 10 hours to obtain the composition La-Mg-Cr-SiO of the present invention 2 .

[0061] Composition: MgO, Cr 2 o 3 and La 2 o 3 In total, the magnesium content is 16% by weight, the chromium content is 5% by weight, and the ...

Embodiment 1-2

[0064] Adsorbents suitable for use in the methods provided by the invention and methods for their preparation are described.

[0065] Raw material: γ-Al 2 o 3 Carrier, spherical, with an average particle size of 1.3 mm, the product of Changling Catalyst Factory; Cr(NO 3 ) 3 、K 2 CO 3 All are products of Beijing Chemical Plant.

[0066] Preparation method: The composition K-Cr-γ-Al is prepared by the step-by-step impregnation method as in Example 1-1 2 o 3 . After each step of impregnation, dry at 110°C for 12 hours and bake at 900°C for 8 hours.

[0067] Composition: in K 2 CO 3 、Cr 2 o 3 Gauge, K-Cr-γ-Al 2 o 3 The potassium content is 4% by weight, and the chromium content is 17% by weight.

[0068] Among them, chromium is represented by Cr 6+ and Cr 3+ Occurs, in elements, Cr 3+ The content is 91%, Cr 6+ The content is 9%.

Embodiment 1-3

[0070] Adsorbents suitable for use in the methods provided by the invention and methods for their preparation are described.

[0071] Raw material: γ-Al 2 o 3 Carrier, spherical, with an average particle size of 1.3 mm, the product of Changling Catalyst Factory; Mn(NO 3 ) 2 (for 50% by weight solution), Cr(NO 3 ) 3 、Na 2 CO 3 All are products of Beijing Chemical Plant.

[0072] Preparation method: The composition Na-Mn-Cr-γ-Al is prepared by the step-by-step impregnation method as in Example 1-1 2 o 3 . After each step of impregnation, dry at 110°C for 12 hours and bake at 700°C for 6 hours.

[0073] Composition: with Na 2 CO 3 , MnO 2 、Cr 2 o 3 Gauge, Na-Mn-Cr-γ-Al 2 o 3 The content of sodium in the medium is 16% by weight, the content of manganese is 5% by weight, and the content of chromium is 13% by weight Composition Na-Mn-Cr-γ-Al 2 o 3 .

[0074] Among them, chromium is represented by Cr 6+ and Cr 3+ Occurs, in elements, Cr 3+ The content is 81%, C...

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Abstract

The invention relates to a method for removing sulfur and nitric oxides from flue gas, which comprises the step of contacting the flue gas containing sulfur and nitric oxides with an adsorbent under the condition of adsorption separation, wherein the adsorbent contains a heat-resisting inorganic oxide matrix, a metal component I and a metal component II; the metal component I is selected from one or more of groups of IA and IIA in a periodic table of elements, and the metal component II is selected from one or more of groups of VIB, VIIB, VIII and IIB in the periodic table of elements; the heat-resisting inorganic oxide matrix is 50 to 99 weight percent of the adsorbent; and the metal component I is 0.5 to 35 weight percent of the oxides, and the metal component II is 0.5 to 35 weight percent of the oxides. Compared with the prior art, the method provided by the invention has high desulfuration and denitrification performance and regeneration stability.

Description

technical field [0001] The invention relates to a method for removing sulfur and nitrogen oxides in flue gas. Background technique [0002] Atmospheric sulfur oxide SOx (more than 95% is SO 2 ), nitrogen oxides NOx (more than 90% are NO) pollution problems are becoming more and more serious, and the flue gas produced by fuel combustion, metal smelting, etc. is the main source of SOx and NOx. These harmful gases cause serious damage to the ecological environment and human health. [0003] At present, the SOx emission control technology in the world is relatively mature. Although a series of researches have been carried out at home and abroad on the NOx emission control, the results are still not satisfactory. [0004] US6521559 discloses a columnar clay catalyst suitable for utilizing NH 3 Selective Catalytic Reduction (SCR) for reducing NO. The characteristics of this catalyst are mainly the introduction of metal oxides such as V in the middle of the clay layer 2 o 5 ,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/04B01D53/86B01D53/60B01J20/04B01J20/32B01J23/06B01J23/10B01J32/00B01J29/03
CPCY02A50/20
Inventor 杜冰宗保宁罗一斌王维家
Owner CHINA PETROLEUM & CHEM CORP