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Removal of co2 from gases having low co2 partial pressures, using 2,2'-(ethylenedioxy)-bis-(ethylamine) (edea)

A technology of ethylenedioxy and ethylamine, applied in the direction of chemical separation, absorption, gas treatment, etc., can solve the problem of increasing the cost of CO2 scrubber

Inactive Publication Date: 2012-10-03
ТІССЕНКРУПП УДЕ ҐМБГ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To avoid such emissions, it would be necessary to add additional process steps which would increase CO even further 2 The cost of the scrubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0035] Example 1: Testing Stability to Oxygen

[0036] The stability of 2,2'-(ethylenedioxy)bis(ethylamine) towards oxygen was determined as follows:

[0037] Analyzes were performed in a glass apparatus consisting of round bottom flasks and reflux condensers. These amines were weighed. A stream of approximately 12 Nl air / hour, presaturated with water vapor, was bubbled through the stirred solution at approximately 110° C. for a period of 4 days. To follow up the course of the reaction, several samples were analyzed daily by gas chromatography and acid / base titration (0.1 molar hydrochloric acid) in order to determine the absolute amine content. At the end, the flasks were weighed as a control to determine the total volume of the solution.

[0038] As a result of pre-saturating the air with water vapor, the weight in the flask increased during the test. Once the test results had been corrected for the weight gain caused by the water introduced, it was determined after com...

example 2

[0040] Example 2: OK CO 2 Absorptive capacity

[0041] The synthesis gas solubility (isotherm P-x data) was measured by the synthetic measurement principle (synthetischen Messprinzip) using a static phase equilibrium setup. In this arrangement, different overall compositions of a mixture are measured at constant temperature. The thermostatic, purified and degassed solvent is pumped by means of metering pumps into an evacuated and thermostatic measuring chamber, which makes it possible to see small differences in volume. Subsequently, the gas is added in multiple smaller batches. The CO contained in the absorbing solution at a certain pressure is then calculated taking into account the gas space 2 .

[0042] Determines 0.1 bar of CO at temperatures between 40°C and 120°C 2 CO under partial pressure 2 Absorption. Cyclic absorption capacity is equal to the difference in load at 40°C and 120°C.

[0043] absorbent Relative cyclic absorption capacity in % ...

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PUM

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Abstract

Use of an absorption agent for removing acid gases from a fluid flow, comprising an aqueous solution of 2,2'-(ethylenedioxy)-bis-(ethylamine).

Description

technical field [0001] The present invention relates to an absorbent for the removal of CO from process gases 2 the goal of. Background technique [0002] CO removal from process gases 2 For reducing CO 2 emissions are of special importance, where CO 2 considered to be the main cause of the greenhouse effect. [0003] The industry often uses, for example, aqueous solutions of organic bases such as alkanolamines as absorbents for the removal of acid gas components. [0004] The absorbent is regenerated by supplying heat, depressurizing, or stripping with suitable auxiliaries. Once the absorbent is regenerated, it can be reused as a regenerated solvent in the absorption of acid gas components. [0005] Flue gases from fossil fuel combustion are obtained at near atmospheric pressure. When the CO in these flue gases 2 When the content is typically around 3vol.% to 13vol.%, the CO 2 The range of the partial pressure is accordingly between 0.03 and 0.13 bar. In order to ...

Claims

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Application Information

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IPC IPC(8): B01D53/14
CPCB01D2257/504Y02C10/04Y02C10/06B01D53/1493B01D53/1475Y02A50/20Y02C20/40B01D53/14B01D53/62
Inventor J·曼泽尔O·冯莫斯泰
Owner ТІССЕНКРУПП УДЕ ҐМБГ
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