Carbon dioxide solid absorbent capable of effectively inhibiting active components from losing effect

A technology for inhibiting activity and carbon dioxide, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problems of carbon dioxide removal efficiency and absorbent utilization rate reduction, absorbent failure, etc., to reduce the preparation cost and equipment. The effect of low corrosion and good application prospects

Inactive Publication Date: 2012-09-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A preliminary study by Southeast University found that SO 2 Dry CO removal with alkali metal-based absorbents 2 Detrimental effects on the process, resulting in absorbent failure, resulting in reduced CO2 removal efficiency and absorbent utilization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Weigh 3 tons of potassium carbonate to make a solution, put 6 tons of activated alumina carrier, fully stir at 70°C-110°C for 8-12 hours, then dry and calcinate to shape; weigh 1 ton of calcium oxide and put it in water, Similarly, after fully stirring at 70°C-110°C to make a solution, evenly spray on the formed absorbent, dry the sprayed absorbent and sieve it according to the engineering needs.

example 2

[0025] Weigh 3 tons of potassium carbonate and dissolve it in water, add 6 tons of activated alumina carrier and 1 ton of magnesium oxide, fully stir at room temperature for 8-12 hours, let the absorbent after stirring and mixing stand for 10 minutes, and wait for the solid particles to settle Finally, filter off the excess liquid, put it in an oven, set the temperature of the oven at 50-60°C, and dry for 2 hours; put the dried absorbent into the muffle furnace, and heat it up to 200°C at a rate of 5-10°C / min. 2h; Sieve the roasted samples according to engineering needs.

example 3

[0027] Put 0.5 tons of calcium oxide, 0.5 tons of magnesium oxide and 6 tons of activated alumina carrier into water, fully stir at 70°C-110°C for 8-12 hours, let the absorbent after stirring and mixing stand for 10 minutes, and wait for the solid particles to settle Finally, filter off the excess liquid, put it in an oven, set the temperature of the oven at 50-60°C, dry and calcinate it into shape, weigh 3 tons of potassium carbonate and dissolve it in water, and evenly spray it on the formed absorbent. The absorbent is dried and screened according to engineering needs.

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PUM

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Abstract

The invention provides a carbon dioxide solid absorbent capable of effectively inhibiting active components from losing effect. One or more of potassium carbonate, sodium carbonate and alkali metal base carbonates is / are used as the active component, one or more of calcium oxide, magnesium oxide and alkali-earth oxides is / are used as the additive, and active aluminum oxide is used as an absorbent carrier; and a precipitation method, impregnation method, impregnation-precipitation method or impregnation-spray method is used for preparing the carbon dioxide solid absorbent. The absorbent can efficiently and quickly remove carbon dioxide in fume, and can also effectively lower loss of effect of the active component alkali metal base carbonates due to sulfur dioxide and other foreign gases in the fume. The research indicates that the carbon dioxide absorption temperature of the absorbent is 60-80 DEG C, the regeneration temperature is 100-300 DEG C, and calcium oxide, magnesium oxide and other additives react with SO2 in the fume to generate sulfites, thereby effectively lowering the loss of effect of the active components due to SO2 and prolonging the service life of the solid absorbent.

Description

technical field [0001] The present invention relates to CO in flue gas produced by fossil fuel combustion 2 The removal and concentration method, especially can effectively reduce the active components in the absorbent due to SO 2 caused failure. The invention belongs to the technical field of carbon dioxide emission reduction. Background technique [0002] CO removal by gas-solid reaction using alkali metal-based absorbents 2 The technology has become one of the current research hotspots due to the advantages of low reaction energy consumption, high efficiency of absorbent recycling, no corrosion to equipment, and no secondary pollution. A certain concentration of acid gas (SO 2 , NO x wait). A preliminary study by Southeast University found that SO 2 Dry CO removal with alkali metal-based absorbents 2 The detrimental effect of the process will cause the failure of the absorbent, resulting in a reduction in the removal efficiency of carbon dioxide and the utilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/81B01D53/62
CPCY02A50/20Y02C20/40
Inventor 陈晓平吴烨董伟刘道银梁财赵长遂
Owner SOUTHEAST UNIV
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