Unlock instant, AI-driven research and patent intelligence for your innovation.

Diethyl succinate absorbent for capturing and separating CO2, and application thereof

A technology of diethyl succinate and diethyl carbonate is applied in the field of diethyl succinate composite absorbent, which can solve the problems of solvent loss and high volatility, and achieves lower solvent vapor pressure, lower solvent loss, and lower cost. Effect

Inactive Publication Date: 2017-09-15
TSINGHUA UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the boiling point of diethyl carbonate is also low (126-128°C), and its volatility is relatively large, so the solvent loss is serious

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 25mol diethyl succinate to 100mol diethyl carbonate to produce CO 2 Mix absorbent. At 20°C and 1.5MPa, the composite solvent absorbs CO 2 ability to measure CO 2 The solubility in the mixed absorbent is 0.4931mol / mol solvent, and the volatility is 6.71×10 -4 mol / molCO 2 , lower than that of diethyl carbonate in CO under the same conditions 2 Volatility in 8.38×10 -4 mol / molCO 2 .

[0016] The saturated vapor pressure of the mixed solvent is 0.7589kPa, which is lower than the saturated vapor pressure of diethyl carbonate 0.9470kPa.

Embodiment 2

[0018] Add 75mol diethyl succinate to 100mol diethyl carbonate to produce CO 2 Mix absorbent. At 25°C and 1.0MPa, the composite solvent absorbs CO 2 ability to measure CO 2 The solubility in the mixed absorbent is 0.2617mol / mol solvent, and the volatility is 9.02×10 -4 mol / molCO 2 , lower than that of diethyl carbonate in CO under the same conditions 2 Volatility in 1.569×10 -3 mol / molCO 2 .

[0019] The saturated vapor pressure of the mixed solvent is 0.7471kPa, which is 1.2916kPa lower than that of diethyl carbonate.

Embodiment 3

[0021] 100mol diethyl succinate as CO 2 absorbent. At 25°C and 1.5MPa, the composite solvent absorbs CO 2 ability to measure CO 2 The solubility in the absorbent is 0.4304mol / mol solvent, and the volatility is 1.19×10 - 5 mol / molCO 2 , lower than that of diethyl carbonate in CO under the same conditions 2 Volatility in 1.152×10 -3 mol / molCO 2 .

[0022] The saturated vapor pressure of the mixed solvent is 0.094kPa, which is 1.2916kPa lower than that of diethyl carbonate.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides an absorbent for capturing and separating CO2. The absorbent comprises, by mole, 0-85% of diethyl carbonate and 15-100% of diethyl succinate. The diethyl succinate added to the diethyl carbonate in the absorbent reduces the vapor pressure of a solvent and solves the problem of serious solvent loss in the process for absorbing CO2 through originally simply using the diethyl carbonate, so the cost is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of decarbonization, in particular to a method for capturing and separating CO 2 Diethyl succinate composite absorbent and its application. Background technique [0002] Global warming has become an undisputed fact that the greenhouse gas CO 2 emissions are a major contributor to climate warming. How to get from rich CO 2 In the gas mixture, including gasification gas, shift gas, IGCC gas and low-quality raw material syngas to capture and separate CO 2 extremely important. [0003] According to different application occasions and the pressure of feed gas, the decarburization method can be divided into dry method and wet method. Dry methods include adsorption methods and membrane methods, and are generally applicable to CO 2 Where the concentration is low; the wet method can be divided into chemical absorption method and physical absorption method, and the chemical absorption method is mostly used in occ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/504Y02A50/20Y02C20/40
Inventor 汤志刚李红伟郭栋爱博贺志敏邢潇王翔迪
Owner TSINGHUA UNIV