Method of use of an ionic liquid and device for sorption of a gas

a technology of ionic liquid and gas, which is applied in the direction of hydrogen sulfide, machine/engine, combustion air/fuel air treatment, etc., can solve the problems of cost-intensive removal of known cosub>2 processes, and achieve the effect of saving to use or less expensiv

Inactive Publication Date: 2012-05-31
PROIONIC
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  • Abstract
  • Description
  • Claims
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Benefits of technology

[0006]It may be an objective of the invention to provide a method of removal of a gaseous or vaporous component an...

Problems solved by technology

However, the known process...

Method used

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  • Method of use of an ionic liquid and device for sorption of a gas
  • Method of use of an ionic liquid and device for sorption of a gas
  • Method of use of an ionic liquid and device for sorption of a gas

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example 1

Sorption of Hydrogen Sulphide

[0076]The experiment was performed at room temperature and a vapor pressure equilibrium of 338 hPa. A beaded bottle is flushed with 120 ml of hydrogen sulphide by using two needles. One of the needles is connected to a manometer having a resolution of 1 hPa. Subsequently 1 ml of TOMA-acetate is injected into the bottle by using one of the needles, wherein the TOMA-acetate was preheated by a hairdryer in order to reduce the viscosity. After 30 minutes of stirring by using a magnetic stir bar a constant reduction of the pressure of 622 hPa was observed. This pressure reduction corresponds to a molar ratio of 0.26 moIH2S / molIL at an equilibrium pressure of 338 hPa. For comparison, a 30% aqueous solution of monoethanolamine provides, under the same conditions, a pressure reduction of 651 hPa which corresponds to a molare ratio of 0.11 molH2S / molL at an equilibrium pressure of 309 hPa.

example 2

Sorption of Carbon Dioxide

[0077]The experiment was performed at room temperature and a vapor pressure equilibrium of 523 hPa. A beaded bottle is flushed with 120 ml of carbon dioxide by using two needles. One of the needles is connected to a manometer having a resolution of 1 hPa. Subsequently 1 ml of TOMA-acetylacetonate is injected into the bottle by using one of the needles, wherein the TOMA-acetylacetonate was preheated by a hairdryer in order to reduce the viscosity. After 30 minutes of stirring by using a magnetic stir bar a constant reduction of the pressure of 437 hPa was observed. This pressure reduction corresponds to a molar ratio of 0.18 molCO2 / molIL at an equilibrium pressure of 523 hPa. For comparison, a 30% aqueous solution of monoethanolamine provides, under the same conditions, a pressure reduction of 670 hPa which corresponds to a molare ratio of 0.12 molCO2 / molL at an equilibrium pressure of 290 hPa.

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Abstract

A method of use of an ionic liquid for sorption of a gas having an electric multipole moment is provided, wherein the ionic liquid comprises an anion and a non-aromatic cation. In particular, the electric multipole moment may be an electric dipole moment and/or an electric quadrupole moment. The sorption may be an adsorption or an absorption. The ionic liquid may be a pure ionic liquid, i.e. a liquid substantially only containing anions and cations, while not containing other components, e.g. water. Alternatively a solution containing the ionic liquid and a solvent or further compound, e.g. water, may be used.

Description

FIELD OF THE INVENTION[0001]The invention relates to a method of use of an ionic liquid, in particular for sorption of a gas or vapor having an electric multipole moment.[0002]Further, the invention relates to a device for sorption of a gas or vapor.BACKGROUND OF THE INVENTION[0003]Carbon dioxide (CO2) is an undesired diluent that is present in many gas sources. In order to improve the quality of the gases the CO2 should be removed to acceptable specifications. In gas processing industry, various technologies have been employed for CO2 removal including chemical solvents, physical solvents, and membranes. By far, chemical solvents that reversibly react with CO2 are most commonly used for CO2 removal.[0004]Furthermore, processes for removal of CO2 from gaseous streams are known, which comprise the contacting a CO2 containing gaseous stream with an absorbent comprising from 1 to 20 wt % water and an ionic liquid comprising pyridines or imidazole cations and an anion, wherein said cont...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/14B01F3/04B01D53/18
CPCB01D53/1456B01D53/1493Y02C10/08Y02C10/06B01D2252/30Y02C20/40C07C211/63C07C381/12C07F9/54
Inventor KALB, ROLAND
Owner PROIONIC
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