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Method for preparing flue gas adsorption desulfurizer

A technology for adsorption desulfurization and flue gas, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of industrial application limitations, complex components of microbial adsorbents, etc., and achieve the goals of reducing consumption, facilitating recycling, and efficient adsorption and removal Effect

Inactive Publication Date: 2013-07-24
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of microbial adsorption can effectively separate sulfur dioxide from flue gas, the composition of microbial adsorbents is complex, which is subject to certain restrictions in industrial applications.

Method used

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  • Method for preparing flue gas adsorption desulfurizer
  • Method for preparing flue gas adsorption desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1.5g γ-Al 2 o 3 Calcined at 600°C for 4h for activation treatment, impregnated L-alpha-alanine in γ-Al with 5% load by equal volume impregnation method 2 o 3 , let stand for 24 hours, and dry at 80°C for 12 hours to obtain 5% Ala / γ-Al 2 o 3 .

[0017] Filling 5% Ala / γ-Al in fixed bed 2 o 3 , Adsorb sulfur dioxide in the flue gas at 30°C, the composition of the flue gas is 2.0% SO 2 , 5.0%O 2 , 5.0%H 2 O and the rest are N 2 . Use the iodometric method to measure the adsorption of sulfur dioxide online. When the sulfur dioxide adsorption penetrates the bed layer, switch to another fixed-bed reactor to continue the adsorption. 2 Desorption at 80°C. The adsorbent undergoes more than 10 times of adsorption-desorption, and the breakthrough desorption amount of sulfur dioxide is stable above 24.5mg / g adsorbent.

Embodiment 2

[0019] 12g γ-Al 2 o 3 Calcined at 600°C for 4h for activation treatment, impregnated L-alpha-alanine in γ-Al with a load of 7% by equal volume impregnation 2 o 3 , let stand for 30h, and dry at 85°C for 18h to obtain 7% Ala / γ-Al 2 o 3 .

[0020] Filling 7% Ala / γ-Al in fixed bed 2 o 3 , Adsorb sulfur dioxide in the flue gas at 30°C, the composition of the flue gas is 1.6% SO 2 , 5.0%O 2 , 5.0%H 2 O and the rest are N 2 . Use the iodometric method to measure the adsorption of sulfur dioxide online. When the sulfur dioxide adsorption penetrates the bed layer, switch to another fixed-bed reactor to continue the adsorption. 2 Desorption at 80°C. The adsorbent undergoes more than 10 times of adsorption-desorption, and the breakthrough desorption amount of sulfur dioxide is stable above 22.6mg / g adsorbent.

Embodiment 3

[0022] 1.0g γ-Al 2 o 3 Calcined at 600°C for 4h for activation treatment, impregnated L-alpha-alanine in γ-Al with 10% load by equal volume impregnation method 2 o 3 On, method is the same as embodiment 1, obtains 10%Ala / γ-Al 2 o 3 .

[0023] Filled with 10% Ala / γ-Al in fixed bed 2 o 3 , at 30°C to adsorb sulfur dioxide in the flue gas, the composition of the flue gas is 1.0% SO 2 , 5.0%O 2 , 5.0%H 2 O and the rest are N 2 . Use the iodometric method to measure the adsorption of sulfur dioxide online. When the sulfur dioxide adsorption penetrates the bed layer, switch to another fixed-bed reactor to continue the adsorption. 2 Desorption at 90°C. The adsorbent undergoes more than 10 times of adsorption-desorption, and the breakthrough desorption amount of sulfur dioxide is stable above 21.3mg / g adsorbent.

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Abstract

The invention discloses a method for preparing a flue gas adsorption desulfurizer and relates to a method for preparing an adsorbent. The preparation method comprises: roasting and activating gamma-Al2O3, loading solution of L-alpha-alanine onto gamma-Al2O3 by an isovolumetric impregnation method, impregnating, standing, and drying to obtain the adsorption desulfurizer (namely Ala / gamma-Al2O3, wherein Ala represents alanine loaded onto the gamma-Al2O3) in which the L-alpha-alanine load capacity is 5 to 20 mass percent. The L-alpha-alanine is loaded onto the gamma-Al2O3 carrier by using the interaction between amino acid and the gamma-Al2O3 serving as a carrier. The prepared flue gas adsorption desulfurizer can efficiently absorb and remove sulfur dioxide and can be recycled after desorption, and thus, the consumption of the absorbent can be reduced. Through the permeation-absorption-desorption process of the absorbent, the absorbent can be used for recovering sulfur dioxide in industry conveniently. A new method is provided for solving the problem of removing sulfur dioxide from flue gas and the problem of recycling.

Description

technical field [0001] The invention relates to a preparation method of an adsorbent, in particular to a preparation method of an alanine-loaded adsorbent. The adsorbent is especially suitable for selective adsorption and desulfurization of sulfur dioxide in flue gas. Background technique [0002] my country's energy structure is dominated by fossil fuels such as coal and petroleum, and sulfur dioxide produced during combustion has become one of the main pollutants in air pollution. The current desulfurization technology is mainly based on wet desulfurization of alkaline substances such as lime milk. A large amount of water is consumed in the desulfurization process, and it is easy to cause secondary pollution. Although semi-dry and dry desulfurization technologies can save water, they basically convert sulfur dioxide into solid waste, and the sulfur dioxide resources in the flue gas cannot be effectively utilized. [0003] It has been reported recently that sulfur dioxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/08B01J20/32B01D53/04
Inventor 贾立山邓人攀李清彪田中标苏帅
Owner XIAMEN UNIV