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Highly-activity sodium-based solid carbon dioxide absorbent

A technology of solid carbon dioxide and activated alumina, which is applied in the direction of chemical separation, chemical instruments and methods, and dispersed particle separation, can solve the problems of slow reaction rate and insufficient absorption capacity, and achieve fast absorption rate, good load capacity, and good The effect of applying the foreground

Inactive Publication Date: 2014-01-01
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Southeast University is also targeting sodium-based solid CO 2 A lot of research has been done on the absorbent, and it was found that after the sodium carbonate was impregnated and loaded on the activated alumina carrier, the prepared absorbent had a well-developed pore structure, which promoted the active components and CO 2 Sufficient exposure is beneficial to the occurrence and progress of the carbon dioxide absorption reaction, but the CO 2 Insufficient absorption capacity, slow reaction rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh 2 tons of sodium carbonate and dissolve in water, add 7.9 tons of activated alumina carrier and 0.1 tons of titanium dioxide, and mix and stir thoroughly for 8-12 hours. Then put it at a temperature of 70-90°C for drying; finally, roast the dried absorbent at a temperature of 200-250°C for 2-3 hours at a constant temperature; and sieve the roasted samples according to engineering needs.

Embodiment 2

[0027] Weigh 4 tons of sodium carbonate to make a solution, put 5 tons of activated alumina carrier, fully mix and stir for 8-12 hours, and then put it at 70-90°C for drying; dry the absorbent at 200-250°C 2-3 hours at a constant temperature for roasting and molding; Weigh 1 ton of titanium dioxide and put it into water, stir it to make a solution, and spray it evenly on the formed absorbent, dry the absorbent prepared after spraying and press Engineering needs to be screened.

Embodiment 3

[0029]Weigh 0.5 tons of titanium dioxide into water, put 6.5 tons of activated alumina carrier, stir thoroughly for 8-12 hours, and then dry at 70-90°C; put the dried absorbent at 200-250°C , keep the temperature for 2-3 hours for roasting and molding; weigh 3 tons of sodium carbonate and put it into water, and stir it sufficiently to make a solution, then evenly spray it on the formed absorbent, dry the absorbent prepared after spraying and follow the project Screening is required.

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PUM

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Abstract

The invention provides a highly-activity sodium-based solid carbon dioxide absorbent which comprises an active ingredient, a carrier and a catalyst, wherein the active ingredient adopts sodium carbonate and accounts for 20%-40% of the total mass of the solid absorbent; the carrier adopts activated aluminum oxide and accounts for 50%-79% of the total mass of the solid absorbent; and the catalyst adopts one or two of TiO2 and TiO(OH)2 and accounts for 1%-10% of the total mass of the solid absorbent. A preparation method of the absorbent adopts an impregnation method, a precipitation method, an impregnation precipitation or an impregnation spraying method. The solid absorbent belongs to low-temperature absorbents, the CO2 absorbent temperature is 60-80 DEG C, and the CO2 desorption temperature is 120-300 DEG C. Materials of the solid absorbent are cheap and accessible, the preparation process cost is low, the procedure is simple, the absorbent is uneasy to become inactive after multiple times of circulation, a higher CO2 removal rate can be maintained, and the absorbent is an optimization scheme with lower investment and energy consumption for the CO2 emission reduction technology and has a wide application prospect.

Description

technical field [0001] The present invention relates to CO in flue gas produced by fossil fuel combustion 2 The method for removing and concentrating uses a wide range of sources of solid absorbent raw materials and is cheap, the preparation method is simple and easy to implement, the absorption speed is fast, and the conversion rate is high. The invention belongs to the technical field of carbon dioxide emission reduction. Background technique [0002] The greenhouse effect and its impact have increasingly become the focus of worldwide attention. Among them, CO 2 The massive emission of greenhouse gases is the main cause of the greenhouse effect and its continuous aggravation. Atmospheric carbon dioxide levels have increased by 25% since the Industrial Revolution, far exceeding the entire historical record that scientists could possibly survey for the past 160,000 years, and there is no sign of slowing down. The Intergovernmental Panel on Climate Change predicts that by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/81B01D53/62
CPCY02C10/04Y02A50/20Y02C20/40
Inventor 陈晓平董伟吴烨刘道银梁财
Owner SOUTHEAST UNIV
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