Aqueous solution capable of absorbing and collecting carbon dioxide in exhaust gas with high efficiency

A carbon dioxide and aqueous solution technology, applied in the direction of absorption, inorganic chemistry, gas treatment, etc., can solve the problems of reduced heat transfer performance, reduced absorption rate, increased viscosity, etc., to achieve reduced energy consumption, reduced circulation flow, and reduced operating costs. Effect

Inactive Publication Date: 2013-03-27
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been shown that its use in high concentrations results in impairment of all properties
This may be because an increase in the concentration of amines in the absorption solution leads to an increase in the viscosity of the absorption solution, which e.g. 2 Decrease in absorption rate, and decrease in heat transfer performance

Method used

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  • Aqueous solution capable of absorbing and collecting carbon dioxide in exhaust gas with high efficiency
  • Aqueous solution capable of absorbing and collecting carbon dioxide in exhaust gas with high efficiency
  • Aqueous solution capable of absorbing and collecting carbon dioxide in exhaust gas with high efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The gas-washed glass bottle was immersed in a constant temperature water bath whose liquid temperature was set at 40°C. The bottle contained 50 mL of an aqueous solution (absorption solution) containing 55% by weight of IPAE (reagent, manufactured by Tokyo Chemical Industry Co., Ltd.) and 100 ppm by weight of Surflon S-141 (produced by AGC Seimi Chemical Co., Ltd.), which is a nonionic perfluorinated compound. As a result of measurement using Drop Master 300 manufactured by Kyowa Interface Science Co., Ltd., the surface tension of the absorption solution at 25° C. before absorption was performed was 25 mN / m. A gas mixture of 20% by volume of carbon dioxide and 80% by volume of nitrogen was dispersed in the solution as bubbles at a rate of 0.7 L / min through a glass filter with a pore size of 100 μm and a diameter of 13 mm at atmospheric pressure to perform absorption for 60 minutes .

[0080] The CO in the gas was measured continuously at the inlet and outlet of the ab...

Embodiment 2 and 3

[0084] CO 2 Saturation absorption, CO 2 Absorption rate, CO 2 heat of absorption and CO 2 The amount of separation was measured as described in Example 1, except that an aqueous solution containing 60 or 70 wt. % of IPAE and 100 or 150 ppm wt. concentration of Surflon S-141 as surfactant was used instead of 55 wt. An aqueous solution of IPAE and 100 ppm of S-141. The surface tensions of these surfactant-containing absorption solutions were 24 mN / m and 23 mN / m, respectively. CO at 40°C 2 The saturated absorption capacity is 158.5g / L and 162.7g / L respectively, the absorption rate is 4.7g / L / min and 4.4g / L / min respectively, CO at 70°C 2 The separation amounts of the samples were 87.5g / L and 89.5g / L respectively.

Embodiment 4 to 6

[0086] CO 2 Saturation absorption, CO 2 Absorption rate, CO 2 heat of absorption and CO 2 The amount of isolation was measured as described in Example 2, except that the type of the alkyl group in the alkylaminoalcohol was changed from isopropyl to n-butyl (n-BAE), isobutyl (IBAE) or n-pentyl (n-PEAE). In Example 5 using IBAE, Triton X, a nonionic polyoxyethylene alkyl ether, was used as a surfactant at a concentration of 200 ppm by weight. The surface tensions of these absorption solutions were 22, 25 and 23 mN / m, respectively.

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Abstract

Disclosed are: an aqueous solution for absorbing and collecting carbon dioxide from a gas containing carbon dioxide, characterized by comprising 50-70 wt% of a secondary amine compound represented by general formula [1] and a surfactant; and a method for absorbing and collecting carbon dioxide using the aqueous solution. (In the formula, R represents a linear or branched alkyl group having 3-5 carbon atoms.)

Description

technical field [0001] The present invention relates to a method for absorbing and recovering carbon dioxide (CO 2 ) in aqueous solution. The invention also relates to methods for absorbing and recovering carbon dioxide using the aqueous solution. Background technique [0002] In recent years, frequent disasters and climate change, which are considered to be caused by global warming, have had a serious impact on agricultural production, living conditions, and energy consumption. This global warming is believed to be caused by an increase in greenhouse gases such as carbon dioxide, methane, nitrous oxide and CFCs in the atmosphere as human activities increase. Chief among these greenhouse gases is carbon dioxide in the atmosphere, and measures to cut carbon dioxide emissions are urgently needed. [0003] Examples of sources of carbon dioxide include thermal power plants, factory boilers, cement plant kilns using coal, heavy oil, natural gas, etc. as fuel; blast furnaces in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14B01D53/62C01B31/20C01B32/50
CPCB01D53/14B01D2257/504Y02C10/06B01D2252/60C01B31/20B01D2252/20484B01D2252/20426B01D53/1475B01D53/62B01D53/1493Y02C10/04B01D2252/20405Y02C20/40C01B32/50B01D53/96
Inventor 冈部弘道F·A·乔杜里后藤和也小野田正巳松崎洋市
Owner NIPPON STEEL CORP
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