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Removal of CO from biohydrogen gas by ionic liquid supported on graphene 2 Methods

A technology of ionic liquid and biohydroane, applied in separation methods, chemical instruments and methods, gas fuels, etc., can solve the problems of high velocity and viscosity, and achieve the effect of increasing the absorption reaction rate and shortening the absorption equilibrium time

Active Publication Date: 2020-12-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such ionic liquids absorb CO 2 Although the capacity is significantly higher than that of traditional alcohol amine solutions, they absorb CO 2 The rate is still limited by the high viscosity

Method used

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  • Removal of CO from biohydrogen gas by ionic liquid supported on graphene <sub>2</sub> Methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] will absorb CO 2 Capacity is 0.95mol CO 2 / mol of ionic liquid [P 66614 ][Triz] was mixed with absolute ethanol at a mass ratio of 1:5, and mechanically stirred at room temperature for 30 minutes to obtain a uniformly mixed ionic liquid-ethanol solution. Then graphene (specific surface area is 1000m 2 / g) in accordance with the ionic liquid [P 66614 ][Triz] with a mass ratio of 4:1 was added to the ionic liquid-ethanol solution, and mechanically stirred at 80°C for 2 hours. Reflux the evaporated absolute ethanol with a condenser to obtain a mixed liquid-solid suspension of graphene-ionic liquid-ethanol. The liquid-solid mixed suspension was heated and evaporated at 80°C to remove absolute ethanol, and stirred every 1 hour during the evaporation process to obtain the ionic liquid [P 66614 ][Triz]. The evaporated anhydrous ethanol is recycled after being condensed and recovered. Ionic liquids loaded on graphene [P 66614 ][Triz] into a fixed bed reactor. At the bo...

Embodiment 2

[0024] will absorb CO 2 Capacity is 0.95mol CO 2 / mol of ionic liquid [P 66614 ][Triz] was mixed with absolute ethanol at a mass ratio of 1:10, and mechanically stirred at room temperature for 30 minutes to obtain a uniformly mixed ionic liquid-ethanol solution. Then graphene (specific surface area is 800m 2 / g) in accordance with the ionic liquid [P 66614 ][Triz] with a mass ratio of 5:1 was added to the ionic liquid-ethanol solution, and mechanically stirred at 80°C for 2 hours. Reflux the evaporated absolute ethanol with a condenser to obtain a mixed liquid-solid suspension of graphene-ionic liquid-ethanol. The liquid-solid mixed suspension was heated and evaporated at 80°C to remove absolute ethanol, and stirred every 1 hour during the evaporation process to obtain the ionic liquid [P 66614 ][Triz]. The evaporated anhydrous ethanol is recycled after being condensed and recovered. Ionic liquids loaded on graphene [P 66614 ][Triz] into a fixed bed reactor. At the bo...

Embodiment 3

[0026] will absorb CO 2 Capacity is 0.95mol CO 2 / mol of ionic liquid [P 66614 ][Triz] was mixed with absolute ethanol at a mass ratio of 1:15, and mechanically stirred at room temperature for 30 minutes to obtain a uniformly mixed ionic liquid-ethanol solution. Then graphene (specific surface area is 600m 2 / g) in accordance with the ionic liquid [P 66614 ][Triz] with a mass ratio of 6:1 was added to the ionic liquid-ethanol solution, and mechanically stirred at 80°C for 2 hours. Reflux the evaporated absolute ethanol with a condenser to obtain a mixed liquid-solid suspension of graphene-ionic liquid-ethanol. The liquid-solid mixed suspension was heated and evaporated at 80°C to remove absolute ethanol, and stirred every 1 hour during the evaporation process to obtain the ionic liquid [P 66614 ][Triz]. The evaporated anhydrous ethanol is recycled after being condensed and recovered. Ionic liquids loaded on graphene [P 66614 ][Triz] into a fixed bed reactor. At the bo...

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Abstract

The invention relates to an energy-saving environmental protection and CO2 emission reduction technology, and aims to provide a method for removing CO2 from biohydrogen alkane gas by ionic liquid supported on graphene. The method comprises the following steps of mixing ionic liquid [P66614][Triz] with anhydrous ethanol, adding the graphene, and stirring to obtain a liquid-solid mixed suspension; heating and evaporating to remove ethanol to obtain supported ionic liquid; loading into a fixed bed reactor, and introducing the biohydrogen alkane gas for chemical absorption reaction; desorbing thesupported ionic liquid which absorbs CO2 by heating to obtain CO2; recycling the regenerated ionic liquid for use. When the ionic liquid [P66614][Triz] is supported on the graphene with a high specific surface area, the absorption reaction rate of the ionic liquid to the CO2 in the biohydrogen alkane gas can be significantly increased, the rate of a mixed absorbent removing the CO2 is increased by20-70%, compared with the rate of pure ion liquid [P66614][Triz] removing the CO2, and the absorption equilibrium time is shortened by 20-40%.

Description

technical field [0001] The present invention is about energy saving and environmental protection and CO 2 Emission reduction technology, especially a kind of ionic liquid loaded on graphene to remove CO from biohydrocarbon gas 2 Methods. Background technique [0002] Due to environmental pollution and energy shortages, biogas treatment and subsequent utilization have received more and more attention. Biological hydrogen alkane gas can be obtained by two-phase fermentation of biomass waste, and its main component is CH 4 / H 2 / CO 2 of mixed gas. CO in the gas mixture 2 Removal can be used to obtain vehicle gas, which can achieve significant environmental and economic benefits. Aqueous solutions of alcohol amines such as monoethanolamine, diethanolamine, and N-methyldiethanolamine have been widely used to absorb CO 2 , but there are problems of high heating energy consumption, reagent volatilization and equipment corrosion when the alcohol amine aqueous solution is reg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/62B01D53/78C10L3/10
CPCB01D53/62B01D53/78B01D2257/504C10L3/104Y02C20/40
Inventor 程军岑可法周俊虎刘建忠张彦威王智化周志军杨卫娟何勇
Owner ZHEJIANG UNIV
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