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Methods and systems for deacidizing gaseous mixtures

Inactive Publication Date: 2010-04-22
HU LIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]It is now discovered that a method for deacidizing a gaseous mixture involving phase enhanced gas-liquid absorption increases the absorption rate of an acid gas from the gaseous mixture and reduces the overall energy costs for such deacidizing operation.

Problems solved by technology

In addition, the typical gas-liquid absorption process is limited to the use of an absorbent in the form of one liquid phase.

Method used

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  • Methods and systems for deacidizing gaseous mixtures
  • Methods and systems for deacidizing gaseous mixtures
  • Methods and systems for deacidizing gaseous mixtures

Examples

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example 1

[0075]An absorbent comprising two phases, an organic phase and a carrier phase, and a gaseous mixture containing carbon dioxide were supplied into a stirring cell absorption unit at about 25-45° C., 1 atm. The organic phase comprised 20% by volume of monoethanolamine and 80% by volume of decyl alcohol. The carrier phase comprised the reaction product of monoethanolamine and carbon dioxide.

[0076]When the organic phase contacted the gaseous mixture, carbon dioxide gas was chemically absorbed into the organic phase by reacting with monoethanolamine in the organic phase. The absorbed carbon dioxide existed as a reaction product formed between the absorbed carbon dioxide and monoethanolamine. The reaction product was then transferred through the interface between the organic phase and carrier phase into the carrier phase and accumulated there.

[0077]After absorption of the carbon dioxide gas, the absorbent was settled and separated by gravity into a first gas-lean phase and a gas-rich pha...

example 2

[0080]An absorbent comprising two liquid phases, an organic phase and a carrier phase, and a gaseous mixture containing carbon dioxide were supplied into a stirring cell absorption unit at about 25-45° C., 1 atm. The organic phase comprised 20% by volume of dibutylamine and 80% by volume of isooctanol. The carrier phase comprised an aqueous solution of 150 g / l of potassium carbonate.

[0081]When the organic phase contacted the gaseous mixture, carbon dioxide gas was chemically absorbed into the organic phase by reacting with dibutylamine in the organic phase. The absorbed carbon dioxide existed as a reaction product formed between the absorbed carbon dioxide and dibutylamine. The reaction product was then transferred through the interface between the organic phase and carrier phase into the carrier phase by further reacting with potassium carbonate in the carrier phase to form potassium bicarbonate. Thus, the absorbed carbon dioxide ultimately existed as potassium bicarbonate in the c...

example 3

[0085]An absorbent comprising two liquid phases, an organic phase and a carrier phase, and a gaseous mixture containing carbon dioxide were supplied into a stirring cell absorption unit at about 25 to 45° C., 1 atm. The organic phase comprised 20% by volume of dibutylamine and 80% by volume of isooctanol. The carrier phase was a water solution.

[0086]When the organic phase contacted the gaseous mixture, carbon dioxide gas was chemically absorbed into the organic phase by reacting with dibutylamine in the organic phase. The absorbed carbon dioxide existed as a reaction product formed between the absorbed carbon dioxide and dibutylamine. The reaction product was then transferred through the interface between the organic phase and carrier phase into the carrier phase and accumulated there.

[0087]After absorption of the carbon dioxide gas, the absorbent was settled and separated by gravity into a first gas-lean phase and a gas-rich phase. The first gas-lean phase, comprising the unreacted...

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Abstract

An improved process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption is described. The process utilizes a multiphasic absorbent that absorbs an acid gas at increased rate and leads to reduced overall energy costs for the deacidizing operation.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application is a divisional application of U.S. patent application Ser. No. 12 / 250,257, filed on Oct. 13, 2008, which in turn is a continuation-in-part application of U.S. patent application Ser. No. 11 / 279,095, filed on Apr. 7, 2006, issued as U.S. Pat. No. 7,541,011 on Jun. 2, 2009, the disclosures of which are incorporated herein by reference.STATEMENT OF GOVERNMENT LICENSE RIGHTS[0002]The U.S. Government has a paid-up license in this invention and the right in limited circumstances to require the patent owner to license others on reasonable terms as provided for by the terms of Grant Nos. DE-FG26-02NT41668; DE-FG26-04NT42128; and DE-FG26-05NT42488 awarded by the United States Department of Energy.FIELD OF THE INVENTION[0003]The present invention relates to a process for deacidizing a gaseous mixture using phase enhanced gas-liquid absorption. More particularly, the present invention relates to a process for deacidizing a gaseous mixtur...

Claims

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Application Information

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IPC IPC(8): B01D53/18C01B32/50
CPCB01D53/1418Y02C10/06B01D53/1493B01D53/62B01D2251/306B01D2251/606B01D2252/20405B01D2252/20421B01D2252/20484B01D2252/504B01D2257/2045B01D2257/302B01D2257/304B01D2257/306B01D2257/308B01D2257/504B01D53/1475Y02C20/40B01D53/14B01D53/34
Inventor HU, LIANG
Owner HU LIANG
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