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Alkali-metal-based nano fluid CO2 absorption solution

A nanofluid and absorption liquid technology, applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve the problem of low reactivity of alkali metal-based solid absorbents, difficulty in cyclic transport of solid absorbents, heat and mass transfer Poor performance and other problems, to achieve the effect of convenient circulation transportation, enhanced gas-liquid heat and mass transfer effect, and not easy to degrade

Inactive Publication Date: 2017-10-20
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the decarburization of alkali metal-based solid absorbents is a gas-solid reaction with poor heat and mass transfer performance, and it is difficult to circulate and transport solid absorbents.
[0006] In summary, in order to solve the problems of MEA absorbent loss and serious equipment corrosion, alkali metal-based solid absorbents have low reactivity and difficult circulation transportation, it is necessary to provide a new type of CO 2 Absorbents and Absorption Technologies

Method used

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  • Alkali-metal-based nano fluid CO2 absorption solution
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 200g of potassium carbonate and dissolve it in 798.5ml of deionized water, stir for 1h at room temperature with a magnetic stirrer; measure 1g of nano-SiO 2 Powder and 0.5g hydroxyethyl cellulose are poured into the prepared solution and stirred evenly with a magnetic stirrer; the prepared solution is put into an ultrasonic breaker with 10 seconds as an oscillation cycle (5 seconds to run, 5 seconds to cool) Ultrasonic oscillation for 30 minutes to obtain the alkali metal-based nanofluid CO 2 Absorb fluid.

[0027] The decarburization-regeneration capability test was carried out on the above-mentioned prepared absorption liquid, the prepared absorption liquid was injected into the pressure vessel, and CO 2 Gas, raise the temperature of the reactor from room temperature to the decarburization temperature of 40°C, then keep it constant, and use a flue gas analyzer to detect CO in the outlet gas 2 Change the concentration until its concentration is basically consta...

Embodiment 2

[0029] Weigh 200g of potassium carbonate and dissolve it in 798.5ml of deionized water. Stir for 1 hour at room temperature using a magnetic stirrer; measure 1g of nano-Fe 2 o 3 Pour the granules and 0.5g hydroxyethyl cellulose into the prepared solution and stir evenly with a magnetic stirrer; put the prepared solution into an ultrasonic breaker with 10 seconds as an oscillation cycle (5 seconds to run, 5 seconds to cool) Ultrasonic oscillation for 30 minutes to obtain the alkali metal-based nanofluid CO 2 Absorb fluid.

[0030] Inject the prepared absorption solution into the pressure vessel and pass through CO 2 Gas, raise the temperature of the reactor from room temperature to the decarburization temperature of 40°C, then keep it constant, and use a flue gas analyzer to detect CO in the outlet gas 2Change the concentration until its concentration is basically constant; switch the gas to Ar gas, raise the temperature of the reactor to the set final decomposition temperat...

Embodiment 3

[0032] Weigh 200g of potassium carbonate and dissolve it in 798.5ml of deionized water. Stir with a magnetic stirrer for 1h at room temperature; measure 1g of nano-TiO 2 Granules and 0.5g sodium lauryl sulfate are poured into the prepared solution and stirred evenly using a magnetic stirrer; ) ultrasonic oscillation for 30 minutes to obtain the alkali metal-based nanofluid CO used 2 Absorb fluid.

[0033] Inject the prepared absorption solution into the pressure vessel and pass through CO 2 Gas, raise the temperature of the reactor from room temperature to the decarburization temperature of 40°C, then keep it constant, and use a flue gas analyzer to detect CO in the outlet gas 2 Change the concentration until its concentration is basically constant; switch the gas to Ar gas, raise the temperature of the reactor to the set final decomposition temperature of 85°C, then keep it constant, and use a flue gas analyzer to detect CO in the outlet gas 2 Change the concentration unti...

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Abstract

The present invention discloses an alkali-metal-based nano fluid CO2 absorption solution. An aqueous solution of alkali-metal-based carbonate (potassium carbonate or sodium carbonate) is used as a base liquid of the absorption solution, the alkali-metal-based carbonate accounts for 5% to 70% of the total mass of the aqueous solution, one of nano silicon oxide, nano iron oxide, nano zirconia, nano titanium oxide and nano magnesium oxide is used as an additive, the additive accounts for 0.1% to 1% of the total mass of the aqueous solution, one of hydroxyethyl cellulose, sodium stearate and sodium dodecyl sulfate is used as a dispersant, and the dispersant accounts for 0.1% to 1% of the total mass of the aqueous solution. The absorption temperature of the CO2 absorption solution is 10 to 50 DEG C, the regeneration temperature is 60-150 DEG C, at the same time, the CO2 absorption solution is convenient to cycle and transport, not easy to wear, less in equipment corrosion, high in CO2 removal efficiency, low in energy consumption, energy-saving and environmentally-friendly.

Description

technical field [0001] The present invention relates to CO in flue gas produced by fossil fuel combustion 2 The removal and concentration method, specifically relate to an alkali metal-based nanofluid CO 2 The absorbent belongs to the technical field of carbon dioxide emission reduction. Background technique [0002] With the continuous development of social industrialization, the increasingly serious problem of global warming caused by greenhouse gas emissions has become the focus of widespread concern in the international community. In electricity production with fossil fuels as the main energy source, CO 2 The emissions of CO 2 More than 30% of total emissions are CO 2 The largest single point stationary emission source. Therefore, research and development of CO 2 The role of emission reduction technologies in controlling and mitigating CO 2 The sharp rise in emissions is of great strategic importance. [0003] In many CO 2 Among capture technologies, alcohol ami...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/504Y02A50/20Y02C20/40
Inventor 吴烨赵文文刘岩高原刘冬蒋波
Owner NANJING UNIV OF SCI & TECH
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