scholarly journals High CO2 absorption capacity by chemisorption at cations and anions in choline-based ionic liquids

2017 ◽  
Vol 19 (46) ◽  
pp. 31216-31226 ◽  
Author(s):  
Shubhankar Bhattacharyya ◽  
Andrei Filippov ◽  
Faiz Ullah Shah
Keyword(s):  
Ionic Liquids ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
High Co2

High CO2 capture by mutual involvement of cations and anions of the IL [N1,1,6,2OH][4-Triz].

scholarly journals The CO2 Absorption in Flue Gas Using Mixed Ionic Liquids

Molecules ◽  
2020 ◽  
Vol 25 (5) ◽  
pp. 1034 ◽  
Author(s):  
Guoqing Wu ◽  
Ying Liu ◽  
Guangliang Liu ◽  
Xiaoying Pang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Flue Gas ◽  
Active Sites ◽  
Structural Changes ◽  
Absorption Capacity ◽  
Co2 Absorption ◽  
Quantum Chemical Methods ◽  
Before And After ◽  
Calculation Results

Because of the appealing properties, ionic liquids (ILs) are believed to be promising alternatives for the CO2 absorption in the flue gas. Several ILs, such as [NH2emim][BF4], [C4mim][OAc], and [NH2emim[OAc], have been used to capture CO2 of the simulated flue gas in this work. The structural changes of the ILs before and after absorption were also investigated by quantum chemical methods, FTIR, and NMR technologies. However, the experimental results and theoretical calculation showed that the flue gas component SO2 would significantly weaken the CO2 absorption performance of the ILs. SO2 was more likely to react with the active sites of the ILs than CO2. To improve the absorption capacity, the ionic liquid (IL) mixture [C4mim][OAc]/ [NH2emim][BF4] were employed for the CO2 absorption of the flue gas. It is found that the CO2 absorption capacity would be increased by about 25%, even in the presence of SO2. The calculation results suggested that CO2 could not compete with SO2 for reacting with the IL during the absorption process. Nevertheless, SO2 might be first captured by the [NH2emim][BF4] of the IL mixture, and then the [C4mim][OAc] ionic liquid could absorb more CO2 without the interference of SO2.

Why are Ionic Liquids Attractive for CO2 Absorption? An Overview

2009 ◽  
Vol 62 (4) ◽  
pp. 298 ◽  
Author(s):  
Junhua Huang ◽  
Thomas Rüther
Keyword(s):  
Ionic Liquids ◽  
Co2 Capture ◽  
Power Plants ◽  
Cost Effective ◽  
Absorption Capacity ◽  
Selective Absorption ◽  
Co2 Absorption ◽  
Co2 Solubility ◽  
Capture Process ◽  
Advantages And Disadvantages

As the climate debate is hotting up, so is the (re)search for finding powerful new materials for the efficient and cost-effective removal of CO2 from flue-gas streams from power plants and other emission sources. Ionic liquids (ILs), exhibiting higher CO2 solubility than conventional organic solvents, have received considerable interest as new CO2 absorbents. The present paper evaluates the advantages and disadvantages of ILs, and provides an overview of the recent developments of ILs for CO2 capture. In conventional ILs, CO2 is absorbed by occupying the free space between the ions through physical absorption mechanisms. As another promising strategy, task-specific ILs have been studied that, by attaching functional groups to the ions, allow the formation of chemical bonds to improve the overall absorption capacity during the CO2 capture process. Other strategies include using ILs as reaction media or as selective absorption materials.

High CO2 absorption by diamino protic ionic liquids using azolide anions

2018 ◽  
Vol 54 (17) ◽  
pp. 2106-2109 ◽  
Author(s):  
Tamas Oncsik ◽  
R. Vijayaraghavan ◽  
Douglas R. MacFarlane
Keyword(s):  
Ionic Liquids ◽  
Co2 Absorption ◽  
Protic Ionic Liquids ◽  
High Co2 ◽  
Highly Efficient ◽  
Low Viscosity

Highly efficient low-viscosity protic ionic liquids with enhanced CO2 absorption capacities exhibiting more than 20% w/w uptake.

scholarly journals Phase Change and Regeneration Behaviors of Amino Acid Ionic Liquids Absorbents

2018 ◽  
Author(s):  
Xueqin Chen ◽  
Hui Guo ◽  
Huang Ouyang ◽  
Qiongfang Song ◽  
Zhengguang Sun ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Consumption ◽  
Amino Acid ◽  
Phase Change ◽  
Carbon Capture ◽  
Solid Phase ◽  
Raw Materials ◽  
Solvent System ◽  
Absorption Capacity ◽  
Co2 Absorption

As novel materials for carbon capture, phase change solvents can separate into two immiscible phases during the CO2 capturing procedure under a certain temperature. The solvent systems can significantly decrease the energy consumption since the solvents can be regenerated by only heating the rich-CO2 phase. In this work, amino acid ionic liquids (AAILs) were synthesized using quaternary ammonium salts and amino acids as raw materials, and the aqueous solutions were prepared as novel liquid-solid phase change solvents. The results showed that the solvents had excellent CO2 absorption capacity, and the AAILs functionalized by glycine and tryptophan exhibited significant phase change properties. The mechanism of phase-change of the solvent were mainly due to the lower solubility of the product after reaction between AAILs and CO2. The solvent with tryptophan as anion could be regenerated by only heating the CO2-riched solid phase, which might significantly decrease energy consumption of regeneration. And the absorbent could be reused with the regenerated absorption ratio up to 79%. The solvent system has great potential in industrial application due to the easy operation process and efficient recycling ability.

Research Trends of Carbon Dioxide Capture using Ionic Liquids and Aqueous Amine-Ionic Liquids Mixtures

2016 ◽  
Vol 13 (1) ◽  
pp. 53
Author(s):  
Siti Nabihah Jamaludin ◽  
Ruzitah Mohd Salleh
Keyword(s):  
Ionic Liquids ◽  
Co2 Capture ◽  
Membrane Separation ◽  
Carbon Dioxide Capture ◽  
Global Climate ◽  
Research Trends ◽  
Co2 Absorption ◽  
Absorption Process ◽  
Chemical Absorption ◽  
Factors Influencing

Anthropogenic CO2 emissions has led to global climate change and widely contributed to global warming since its concentration has been increasing over time. It has attracted vast attention worldwide. Currently, the different CO2 capture technologies available include absorption, solid adsorption and membrane separation. Chemical absorption technology is regarded as the most mature technology and is commercially used in the industry. However, the key challenge is to find the most efficient solvent in capturing CO2. This paper reviews several types of CO2 capture technologies and the various factors influencing the CO2 absorption process, resulting in the development of a novel solvent for CO2 capture.

Amine blending optimization for maximizing CO2 absorption capacity in a diisopropanolamine – methyldiethanolamine – H2O system using the electrolyte UNIQUAC model

2021 ◽  
Vol 419 ◽  
pp. 129517
Author(s):  
Bong Keun Choi ◽  
Seung-Mo Kim ◽  
Kyung-Min Kim ◽  
Ung Lee ◽  
Jeong Ho Choi ◽  
...  
Keyword(s):  
Absorption Capacity ◽  
Co2 Absorption ◽  
Uniquac Model

Thermodynamic properties of CO2 absorption in hydroxyl ammonium ionic liquids at pressures of (100–1600)kPa

2009 ◽  
Vol 41 (10) ◽  
pp. 1069-1073 ◽  
Author(s):  
K.A. Kurnia ◽  
F. Harris ◽  
C.D. Wilfred ◽  
M.I. Abdul Mutalib ◽  
T. Murugesan
Keyword(s):  
Ionic Liquids ◽  
Thermodynamic Properties ◽  
Co2 Absorption ◽  
Ammonium Ionic Liquids
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