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Calcium-based carbon dioxide adsorbent and preparation method thereof

A carbon dioxide and adsorbent technology, which is applied in the field of carbon dioxide adsorbent and its preparation, can solve the problems of reducing and increasing absorption costs, and achieve the effects of reducing costs, improving efficiency, high absorption conversion rate and recyclable utilization rate

Active Publication Date: 2014-03-12
王岩
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preliminary research of this technology is mainly aimed at natural limestone, which is widely used because of its low price and wide distribution; however, due to the limitation of the structural characteristics of natural limestone itself, it is difficult for the absorption and conversion of carbon dioxide when it is recycled. The rate (absorption conversion rate = calcium oxide-based adsorbent converted to calcium carbonate / total amount of adsorbent) decreases drastically with increasing cycle times, thereby greatly increasing the absorption cost

Method used

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  • Calcium-based carbon dioxide adsorbent and preparation method thereof
  • Calcium-based carbon dioxide adsorbent and preparation method thereof
  • Calcium-based carbon dioxide adsorbent and preparation method thereof

Examples

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example 1

[0028] Example 1: This calcium-based carbon dioxide adsorbent is prepared by the following process.

[0029] (1) At room temperature, add 2g of Tween 80 (English: Tween 80 or Polysorbate 80) and 0.25g of polyethylene glycol (molecular mass: 10,000) into a beaker filled with 200ml of deionized water, and keep a uniform rotation speed of 400rpm Stir for 5 minutes to fully dissolve the solute in the solute. At 30°C, slowly drop 25ml of concentrated sodium carbonate solution (0.1mol / L) into the previous beaker, and then slowly drop 25ml of concentrated calcium chloride solution (0.1mol / L) into the mixed solution. It can be observed that a white precipitate precipitates out, and the stirring is continued for 5 minutes; then the beaker is left to stand at room temperature for 24 hours. In the above process, the weight of the calcium carbonate product in the solution is 0.235g; the mass ratio of the calcium carbonate product to Tween 80 is 1:8.51, and the mass ratio of the calcium c...

example 2

[0033] Example 2: This calcium-based carbon dioxide adsorbent is prepared by the following process.

[0034] (1) At room temperature, add 3g Tween 80 and 0.25g polyethylene glycol (molecular weight 6000) into a beaker filled with 200ml deionized water, keep stirring at a uniform speed of 400rpm for 5 minutes to fully dissolve the solute in in the solute. At 20°C, slowly add 50ml of concentrated sodium carbonate solution (0.05mol / L) into the previous beaker, then slowly drop 50ml of concentrated calcium chloride solution (0.05mol / L) into the mixed solution, at this time It can be observed that a white precipitate precipitates out, and the stirring is continued for 5 minutes; then the beaker is left to stand at room temperature for 20 hours. In the above process, the weight of the calcium carbonate product in the solution is 0.240g; the mass ratio of the calcium carbonate product to Tween 80 is 1:12.5, and the mass ratio of the calcium carbonate product to polyethylene glycol i...

example 3

[0037]Example 3: This calcium-based carbon dioxide adsorbent is prepared by the following process.

[0038] (1) At room temperature, add 3.88g of Tween 80 and 0.25g of polyethylene glycol (molecular mass 8000) into a beaker filled with 200ml of deionized water, and keep stirring at a uniform speed of 400rpm for 5 minutes to fully dissolve the solute in the solute. At 35°C, slowly add 25ml of concentrated sodium carbonate solution (0.1mol / L) into the previous beaker, and then slowly drop 25ml of concentrated calcium chloride solution (0.1mol / L) into the solution. It was observed that a white precipitate was precipitated, and the stirring was continued for 5 minutes; the beaker was left standing at room temperature for 30 hours. In the above process, the weight of the calcium carbonate product in the solution is 0.243g; the mass ratio of the calcium carbonate product to Tween 80 is 1:16, and the mass ratio of the calcium carbonate product to polyethylene glycol is 1:1.03.

[0...

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Abstract

The invention discloses a calcium-based carbon dioxide adsorbent and a preparation method thereof. The preparation method comprises the steps of taking sodium carbonate and calcium chloride at equal molar weight as raw materials, tween 80 80 and polyethylene glycol as additives, performing reaction and precipitation in an aqueous solution to form an adsorbent precursor, and roasting the adsorbent precursor to form the calcium-based carbon dioxide adsorbent. The calcium-based carbon dioxide adsorbent obtained by the method has a higher vaterite content, and a high reaction rate with carbon dioxide; 80% of total conversion rate can be reached in 10 minutes basically; the energy consumption is greatly reduced; compared with natural limestone and other synthesized calcium-based adsorbents, the calcium-based carbon dioxide adsorbent has a higher conversion rate and a higher recycling rate, can separate a carbon dioxide component from tail gas of a thermal power plant more effectively, and lowers the total operation cost; and the method has the characteristics of simplicity in operation and low cost.

Description

technical field [0001] The invention relates to a carbon dioxide adsorbent and a preparation method thereof, in particular to a calcium-based carbon dioxide adsorbent and a preparation method thereof. Background technique [0002] In recent years, global warming caused by massive emissions of greenhouse gases has had a huge negative impact on the earth's natural ecosystems and the environment in which humans live, such as melting glaciers, rising sea levels, and destroying the balance of natural ecosystems. etc. Carbon dioxide is the most important greenhouse gas component, and its concentration in the atmosphere has soared from 280ppm before the industrial revolution to 400ppm. The main reason for this is the large amount of carbon dioxide emissions artificially produced by the combustion of fossil fuels. Based on my country's current national conditions, coal is still the most widely used primary energy. Because coal has a high carbon-to-hydrogen ratio, it also releases ...

Claims

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Application Information

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IPC IPC(8): B01J20/04B01J20/30B01D53/02
CPCY02C10/08Y02C20/40
Inventor 王岩
Owner 王岩
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