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A chemical method for capturing, immobilizing and purifying carbon dioxide, sulfur dioxide, sulfur trioxide and nitrogen oxides

A technology of sulfur dioxide and sulfur trioxide, applied in the fields of resources, environment and chemical industry, can solve the problems of inability to realize the enrichment and purification of various gases, poor stability of complexes, poor reusability, etc., and achieve fast absorption and analysis speed and high stability. , the effect of large absorption capacity

Inactive Publication Date: 2015-10-07
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, these methods also have many problems, such as: only a single CO 2 Absorption cannot achieve the enrichment and purification of various gases, and the absorption efficiency is low, the absorption conditions are harsh, the regeneration energy consumption is high, the reusability is poor, and the stability of the complex is poor, etc.

Method used

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  • A chemical method for capturing, immobilizing and purifying carbon dioxide, sulfur dioxide, sulfur trioxide and nitrogen oxides
  • A chemical method for capturing, immobilizing and purifying carbon dioxide, sulfur dioxide, sulfur trioxide and nitrogen oxides
  • A chemical method for capturing, immobilizing and purifying carbon dioxide, sulfur dioxide, sulfur trioxide and nitrogen oxides

Examples

Experimental program
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Effect test

Embodiment 1

[0029] In a 100mL stainless steel reactor equipped with an air inlet and an air outlet, the organometallic complex I (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 All are hydrogen, R' is cyclohexyl, X is oxygen, M is bismuth) 10.0g, methylene chloride 5mL, sealed reaction kettle, passed CO2 after stirring 5min 2 A mixture of 90% concentration (He / CO 2 ), CO 2 The pressure of the mixed gas is 3.0 MPa, the temperature is 25 °C, the air inlet and outlet are sealed, and the reaction is stirred for 1 h, and then the CO in the exhaust gas is dynamically detected by a gas chromatograph with a thermal conductivity cell detector. 2 concentration. CO is barely detectable in exhaust 2 , indicating that CO 2 The capture rate is close to 100%, indicating that all organometallic compounds are converted into carbonates, and the conversion and selectivity of organometallic complexes are close to 100%. After the trapping process was completed, it was heated and decomposed under va...

Embodiment 2

[0031] In a 100mL stainless steel reactor equipped with an air inlet and an air outlet, the organometallic complex I (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 All are hydrogen, R' is cyclohexyl, X is oxygen, M is bismuth) 10.0g, methylene chloride 5mL, sealed reaction kettle, passed CO2 after stirring 5min 2 A mixture with a concentration of 90% (SO 2 / CO 2 ), CO 2 The pressure of the mixed gas is 3.0 MPa, the temperature is 45 ℃, the air inlet and outlet are sealed, and the reaction is stirred for 1 h, and then the CO in the exhaust gas is dynamically detected by a gas chromatograph with a thermal conductivity cell detector. 2 and SO 2 concentration. Almost no SO is detected in the exhaust 2 , all CO 2 , indicating that all organometallic compounds are converted into sulfites and carbonates, and the conversion rate of organometallic complexes is close to 100%; indicating that SO 2 The capture rate is close to 100%, and the purification rate of carbon dioxid...

Embodiment 3

[0033] In a 100mL stainless steel reactor equipped with an air inlet and an air outlet, the organometallic complex I (R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 All are hydrogen, R' is methyl, X is oxygen, M is bismuth) 10.0g, benzene 5mL, sealed reaction kettle, passed CO2 after stirring 5min 2 A mixture of 80% concentration (CO 2 / NO 2 ), CO 2 The pressure of the mixed gas is 3.0 MPa, the temperature is 45 °C, the air inlet and outlet are sealed, and the reaction is stirred for 1 h, and then the CO in the exhaust gas is dynamically detected by a gas chromatograph with a thermal conductivity cell detector. 2 and NO 2 concentration. Almost no NO detected in the exhaust 2 , all CO 2 , indicating NO 2 The capture rate is close to 100%, the purification rate of carbon dioxide is close to 100%, and the organometallic compounds are all converted into carbonate and nitrate, indicating that the conversion rate of organometallic complexes is close to 100%. After the ...

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Abstract

The invention provides a chemical method for trapping, chemically fixing and purifying greenhouse gases such as carbon dioxide, sulfur dioxide, sulfur trioxide, nitrogen oxides and the like, which is characterized by adopting an organic metal compound and a solvent as trapping and chemical fixing agents, wherein the organic metal compound is a coordination compound of nitrogenous organic bismuth and organic antimony; and the solvent is an organic solvent. By means of the method, the trapping and chemical fixing of all the greenhouse gases can be realized to form corresponding metal salts; and at different temperatures, selective gradient analysis can be realized so that the trapping and purification of single gas is further realized. The trapping and fixing agents have high fixing capacity, high analytic speed, low regeneration energy consumption and low price, are easy and simple to prepare, have high stability and can be used repeatedly. The chemical method can be widely used for carrying out trapping and chemical fixing on the greenhouse gases in flue gas, synthesis ammonia, natural gas, kiln gas and the like and can realize enrichment purification of the single gas in one step.

Description

【Technical field】 [0001] The invention belongs to the technical fields of resources, environment and chemical industry, and in particular relates to carbon dioxide (CO 2 ), sulfur dioxide (SO 2 ), sulfur trioxide (SO 3 ) and nitrogen oxides (NO X ) new high-efficiency chemical absorbents for capture, chemical immobilization and purification. 【Background technique】 [0002] carbon dioxide (CO 2 ) is currently the most important greenhouse gas on Earth. With the occurrence of the industrial revolution and the advancement of science and technology, CO 2 emissions are also increasing, and CO 2 The greenhouse effect caused by the high content of greenhouse gases has brought a serious impact on human production and life. On the other hand, CO 2 It is an inexhaustible and inexhaustible carbon resource on the earth. With the massive use of traditional carbon resources (fossil fuels) and the rising demand for energy, these carbon resources are becoming increasingly depleted,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14B01D53/60B01D53/62C01B17/56C01B17/90C01B31/20C01B32/50
CPCY02A50/20
Inventor 罗胜联尹双凤邱仁华区泽棠宋星星孟振功邱一苗许新华谭年元
Owner HUNAN UNIV