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Regeneration method of adsorbent composition for removing sulfur and/or nitrogen oxides in flue gas

A technology of nitrogen oxides and adsorbents, which is applied in the field of regeneration of adsorbent compositions, can solve problems such as large performance loss, and achieve the effect of recovery improvement

Active Publication Date: 2011-12-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although as pointed out by Chen Ying et al., La-Cu-Na-γ-Al 2 o 3 It has good recycling performance, but the synchronous SO removal of the regenerated composition 2 and NO performance loss is still large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Raw material: γ-Al 2 o 3 Carrier, spherical shape, average particle size 1.3 mm, product of Changling Catalyst Factory. Na 2 CO 3 , Cu(NO 3 ) 2 , La(NO 3 ) 3 All are products of Beijing Chemical Plant.

[0035] Preparation method: weigh 8.5 grams of Na 2 CO 3 , 15.8 g Cu(NO 3 ) 2 and 12.4 g La(NO 3 ) 3 Dissolve 100ml of solution with deionized water, impregnate 100g of γ-Al with this solution at room temperature 2 o 3 The carrier was dried for 2 hours at 110° C. for 12 hours and calcined at 950° C. for 10 hours to obtain the composition SORB-1 of the present invention.

[0036] Composition of SORB-1: the loading of each component is represented by Na 2 CO 3 , CuO and La 2 o 3 Calculated, the content of sodium is 8% by weight, the content of copper is 5% by weight, and the content of lanthanum is 5% by weight (the content of metal components is analyzed by X-ray fluorescence spectrometry, the same below).

Embodiment 2

[0038] Raw material: γ-Al 2 o 3 Carrier (with embodiment 1); Ba(NO 3 ) 2 , La(NO 3 ) 3 , 50% by weight of Mn(NO 3 ) 2 The solutions are all products of Beijing Chemical Plant.

[0039] Preparation method: 1.7 grams of Ba(NO 3 ) 2 Dissolve 100 ml of solution L1 with deionized water, and dissolve 10 g of La(NO 3 ) 3 and 54.2 g Mn(NO 3 ) 2 The solution was dissolved in deionized water to make 100 ml of solution L2. Sequentially impregnate 100 grams of γ-Al with L1 and L2 2 o 3 The carrier was impregnated for 2 hours, dried at 110°C for 12 hours after each impregnation, and calcined at 900°C for 10 hours to obtain the composition SORB-2 of the present invention.

[0040] Composition of SORB-2: the loading of each component is based on BaO, MnO 2 and La 2 o 3 In total, the content of Ba was 1% by weight, the content of manganese was 13% by weight, and the content of lanthanum was 4% by weight.

Embodiment 3

[0042] 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 All are products of Beijing Chemical Plant.

[0043] Except that the calcination temperature is 800°C, other preparation methods are the same as in Example 1. The composition of the preparation is based on Cr 2 o 3 , MgO, the content of chromium is 1% by weight, and the content of magnesium is 19% by weight Composition SORB-3.

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Abstract

The invention relates to a regeneration method of a absorbent composite for removing sulphur and / or nitrogen oxides in fume, comprising the following steps of: (1) reacting the regenerating composite and reducing gas for 0.5 to 5 hours at 200 to 800 DEG C; (2) reacting the products generated in the step (1) with oxygen-containing gas for 0.5 to 3 hours at the temperature of 200 to 800 DEG C; and (3) reacting the product generated in the step (2) with the reducing gas for 0.5 to 5 hours at the temperature of 200 to 800 DEG C.

Description

technical field [0001] The invention relates to a regeneration method of an adsorbent composition which can be used for removing sulfur and / or 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 me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J38/04B01D53/86B01D53/60B01D53/04B01J20/34
CPCY02A50/20
Inventor 杜冰宗保宁罗一斌王维家
Owner CHINA PETROLEUM & CHEM CORP