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Application of carboxylate compound as absorbent for capturing carbon dioxide

A carbon dioxide and carboxylate technology, which is applied in water pollutants, other chemical processes, chemical instruments and methods, etc., can solve the problems of unresolved carbon dioxide absorption, and the practicability needs to be improved, and achieves faster regeneration. , the effect of increasing the temperature

Active Publication Date: 2022-05-31
BEIJING YUTAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These studies have achieved good results, but the reduction effect of water on carbon dioxide absorption has not been resolved, and its practicability needs to be improved

Method used

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  • Application of carboxylate compound as absorbent for capturing carbon dioxide
  • Application of carboxylate compound as absorbent for capturing carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 2 millimoles of tributylhexylphosphine 2-ethylhexanoate (0.86 grams), add 40 millimoles of water (0.72 grams) in a glass vial, connect a carbon dioxide balloon, and make the solution in carbon dioxide at one atmospheric pressure, After stirring at 25°C for 12 hours, the system was divided into an organic phase and an aqueous phase. Take off the balloon, replace the gaseous carbon dioxide on the upper part of the solution in the bottle with air, titrate with sodium hydroxide solution (0.2w%), and use phenolphthalein as indicator to obtain the amount of carbon dioxide absorbed by it to be 0.98 mmol.

[0034] Under the same conditions, replace tributylhexylphosphine 2-ethylhexanoate with the following reagents, and measure tetrabutylphosphine 2-ethylhexanoate and tributyloctylphosphine 2-ethylhexanoate respectively , Tributyldecylphosphine 2-ethylhexanoate, tributyldodecylphosphine 2-ethylhexanoate, tributyltetradecylphosphine 2-ethylhexanoate, tributyl Hexadecylphosphine...

Embodiment 2

[0036] Substantially the same as Example 1 of the present invention, except that 2 mmoles of tributylhexylphosphine 2-ethylhexanoate (0.86 grams) and 1 mmoles of water are added, all the other are completely the same as Example 1, and its carbon dioxide absorption capacity is 1.0 mmol. It shows that the amount absorbed by the above-mentioned carboxylate and water when the molar ratio is 1:0.5 is compared with that of Example 1, and its carbon dioxide absorption amount is stable to water.

Embodiment 3

[0038] Basically the same as Example 2 of the present invention, except that 2 mmol of water is added, all the other are completely the same as Example 2, and the carbon dioxide absorption is 1.0 mmol. It shows that the amount absorbed by the carboxylate and water when the molar ratio is 1:1 is compared with that of Example 1, and its carbon dioxide absorption amount is stable to water and does not change with the increase of water.

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Abstract

The invention discloses application of a carboxylate compound as an absorbent for capturing carbon dioxide. The carboxylate compound provided by the invention is used as an absorbent for capturing carbon dioxide and / or is applied to preparation of the absorbent for capturing carbon dioxide; carboxylic acid anions in the carboxylate compound are carboxylate radicals with carbon chains with more than 3 carbon atoms, and cations are substituted quaternary ammonium ions and / or quaternary phosphonium ions. The method for efficiently trapping carbon dioxide in an energy-saving manner by adopting a carboxylate compound stable to water comprises the following steps: placing an aqueous solution of the carboxylate compound in a carbon dioxide atmosphere to absorb carbon dioxide, so as to obtain a conjugate of carboxylate and carbon dioxide separated out from water. The invention is used for solving the problems of corrosivity, volatility and high energy consumption of the existing system, and can obtain higher carbon dioxide capture capacity at high temperature, low pressure of carbon dioxide pressure and high pressure; the conjugate of carboxylate and carbon dioxide is stable to water; the carboxylate can be regenerated.

Description

technical field [0001] The invention relates to the application of carboxylate compounds, in particular to the application of carboxylate compounds as absorbents for capturing carbon dioxide and / or in the preparation of absorbents for capturing carbon dioxide, and belongs to the technical field of carbon dioxide capture and carbon emission reduction . Background technique [0002] With the advent of the industrial revolution, humans have used fossil fuels to provide energy in large quantities, and at the same time emitted a large amount of carbon dioxide. The emission rate of carbon dioxide greatly exceeds the absorption and utilization capacity of nature, which leads to the continuous increase of carbon dioxide concentration in the atmosphere. Carbon dioxide is a kind of greenhouse gas. Its large-scale emission leads to an increase in global average temperature, abnormal climate, and increase in extreme weather. Therefore, it has become a social consensus to capture and st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22C02F1/28C02F101/10
CPCB01J20/22C02F1/285C02F2101/10Y02C20/40B01D53/1425B01D53/1475B01D53/1493B01D2252/30B01D2257/504B01D53/62B01D53/1418B01D2252/205B01J20/3425B01J20/3483B01J20/3491
Inventor 张兆富韩布兴
Owner BEIJING YUTAN TECH CO LTD
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