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.

scholarly journals Capture of Acidic Gases from Flue Gas by Deep Eutectic Solvents

Processes ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 1268
Author(s):  
Yan Wang ◽  
Shuhang Ren ◽  
Yucui Hou ◽  
Weize Wu
Keyword(s):  
Hydrogen Bond ◽  
Flue Gas ◽  
Deep Eutectic Solvents ◽  
Absorption Capacity ◽  
Physical Interaction ◽  
Co2 Absorption ◽  
Physicochemical Interaction ◽  
Acidic Gases ◽  
New Strategies ◽  
High Absorption

Up to now, many kinds of deep eutectic solvents (DESs) were investigated for the capture of acidic gases from flue gases. In this review, non-functionalized and functionalized DESs, including binary and ternary DESs, for SO2, CO2 and NO capture, are summarized based on the mechanism of absorption, physical interaction or chemical reaction. New strategies for improving the absorption capacity are introduced in this review. For example, a third component can be introduced to form a ternary DES to suppress the increase in viscosity and improve the CO2 absorption capacity. DESs, synthesized with halogen salt hydrogen bond acceptors (HBAs) and functionalized hydrogen bond donors (HBDs), can be used for the absorption of SO2 and NO with high absorption capacities and low viscosities after absorption, due to physicochemical interaction between gases and DESs. Emphasis is given to introducing the absorption capacities of acidic gases in these DESs, the mechanism of the absorption, and the ways to enhance the absorption capacity.

scholarly journals On the Selective Transport of Nutrients through Polymer Inclusion Membranes Based on Ionic Liquids

Processes ◽  
2019 ◽  
Vol 7 (8) ◽  
pp. 544 ◽  
Author(s):  
Z. Baicha ◽  
M.J. Salar-García ◽  
V.M. Ortiz-Martínez ◽  
F.J. Hernández-Fernández ◽  
A.P. de los Ríos ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Transport Model ◽  
Separation Processes ◽  
Application Range ◽  
Sodium Hydrogen Phosphate ◽  
Selective Transport ◽  
Mapping Analysis ◽  
Before And After ◽  
Diffusion Solution

In the last few years, the use of ionic liquid-based membranes has gained importance in a wide variety of separation processes due to the unique properties of ionic liquids. The aim of this work is to analyze the transport of nutrients through polymer inclusion membranes based on different concentrations of methyltrioctylammonium chloride, in order to broaden the application range of these kinds of membranes. Calcium chloride (CaCl2) and sodium hydrogen phosphate (Na2HPO4) nutrients were used at the concentration of 1 g·L−1 in the feeding phase. The evolution of the concentration in the receiving phase over time (168 h) was monitored and the experimental data fitted to a diffusion-solution transport model. The results show very low permeation values for CaCl2. By contrast, in the case of Na2HPO4 the permeation values were higher and increase as the amount of ionic liquid in the membrane also increases. The surface of the membranes was characterized before and after being used in the separation process by scanning electron microscopy coupled to energy dispersive X-Ray spectroscopy (SEM–EDX) and elemental mapping analysis. The SEM–EDX images show that the polymer inclusion membranes studied are stable to aqueous solution contacting phases and therefore, they might be used for the selective transport of nutrients in separation processes.

scholarly journals Absorption of Sulfur Dioxide by Tetraglyme–Sodium Salt Ionic Liquid

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 436 ◽  
Author(s):  
Qiang Xu ◽  
Wei Jiang ◽  
Jianbai Xiao ◽  
Xionghui Wei
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Sulfur Dioxide ◽  
Sodium Salt ◽  
Lithium Salt ◽  
Absorption Capacity ◽  
Excellent Thermal Stability ◽  
Physical Absorption ◽  
So2 Absorption

A series of tetraglyme–sodium salt ionic liquids have been prepared and found to be promising solvents to absorb SO2. The experiments here show that [Na–tetraglyme][SCN] ionic liquid has excellent thermal stability and a 30% increase in SO2 absorption capacity compared to other sodium salt ionic liquids and the previously studied lithium salt ionic liquids in terms of molar absorption capacity. The interaction between SO2 and the ionic liquid was concluded to be physical absorption by IR and NMR.

Capture of CO2 by [bmim]PF6 Ionic Liquid under Normal Temperature and Pressure Conditions

2011 ◽  
Vol 347-353 ◽  
pp. 116-119
Author(s):  
Qiang Wei Li ◽  
Yi Zhao ◽  
Li Dong Wang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Low Temperature ◽  
Absorption Capacity ◽  
Green Solvent ◽  
Absorption Process ◽  
Chemical Absorption ◽  
Saturated Absorption ◽  
Absorption Time ◽  
Temperature And Pressure

Subscript textCO2 emission control is an important issue, in which chemical absorption process has reached the widest application. Ionic liquid is a kind of green solvent and expected to take the place of traditional amine absorbents as for its better characteristics. In this paper, two iminazole base ionic liquids were synthesized, including of bromide 1-butyl-3-methylimidazo ([bmim]Br) and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF6). The performance of CO2 absorption by [bmim]PF6 and [bmim]Br were compared under the same other conditions. Subscript textIt indicates that [bmim]PF6 has more absorption capacity and less saturated absorption time under low temperature, which provides reference for CO2 control by ionic liquid.

scholarly journals Efek Perubahan Struktur Pati Singkong Yang Dilakukan Pretreatment Dengan Larutan Ion Dan Gelombang Mikro Terhadap Produksi Gula

Jurnal MIPA ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 34
Author(s):  
Irfan Aruan ◽  
Hanny F. Sangian ◽  
Adey Tanauma
Keyword(s):  
Crystal Structure ◽  
Ionic Liquid ◽  
Structural Changes ◽  
Saline Water ◽  
Cassava Starch ◽  
The Other ◽  
Sugar Production ◽  
Characterization Result ◽  
Before And After ◽  
Fixed Power

Penelitian ini bertujuan untuk menganalisis hubungan perubahan struktur pati singkong terhadap produksi gula sebelum dan sesudah pretreatment gelombang mikro dan larutan ion. Pretreatment gelombang mikro dilakukan dengan meradiasikan gelombang elektromagnetik daya tertentu dengan tiga durasi yang berbedat pada substrat. Pretreatment larutan ion dilakukan dengan merendam substrat dalam larutan ion dengan dua konsentrasi garam selama empat hari dan kemudian dibandingkan dengan non-pretreatment. Substrat dikarakterisasi dengan XRD, FTIR dan SEM untuk menganalisis perubahan strukturnya. Produksi. Hasil karakterisasi menunjukkan bahwa struktur kristal pati menjadi lebih amorf dan ikatan antar molekulnya semakin lemah setelah dilakukan pretreatment. Morfologi permukaan bahan menjadi lebih kasar setelah terpapar radiasi microwave. Disisi lain, jumlah fiber pada substrat semakin berkurang setetelah direndam dalam larutan ion. Ketika substrat dihidrolisis, kandungan gula yang didapatkan lebih tinggi daripada tanpa pretreatment.This research aims to analyze the correlation of the structural change on sugar production of cassava starch before and after microwave and ionic liquid pretreatments. A microwave pretreatment was carried out by radiating electromagnetic wave with fixed power with three different durations on the substrate. The ionic liquid pretreatment was conducted by soaking the substrate in to saline water with two salt concentrations for four days and the results were compared to non-pretreatment. Then, the substrates were measured by XRD, FTIR and SEM to analiyze the structural changes. The characterization result showed that the starch crystal structure became more amorphous and molecules bonds were weaker after pretreatment. The surface morphology was rougher after being radiated by microwave. On the other hand, the fiber contents of substrate decreased after soaked on ionic liquid. When substrate were hidrolized, the sugar obtained were higher than without pretreatment.

Synthesis of Ionic Liquid and its Application in Duabanga Grandiflora Wood Powder as Green Solvent

2010 ◽  
Vol 113-116 ◽  
pp. 407-411 ◽  
Author(s):  
Cheng Chen ◽  
Jian Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Dissolution Mechanism ◽  
Wood Powder ◽  
Imidazolium Ionic Liquid ◽  
Imidazolium Chloride ◽  
Chemical Structures ◽  
Before And After ◽  
Naoh Solution ◽  
Ft Ir

In this paper, a kind of imidazolium ionic liquid, 1-butyl-3-methyl imidazolium chloride ( [BMIM]Cl) was synthesized, and the chemical structures of the ionic liquids were characterizaed by FT-IR and NMR. The solubilities of the ionic liquid for duabanga grandiflora powder activated with different modified conditions were studied respectively. Dissolution rate of wood pretreated with about 25% NaOH solution was the best , due to the reduction of the hydrogen bond applied force. The chemical structure and crystal behavior of duabanga grandiflorar powder before and after dissolution were analyzed by FT-IR and XRD, respectively. The dissolution mechanism has also been discussed. The results showed that the ionic liquids had a good solubility for cellulose in activated duabanga grandiflorar powder. Micrographs of the original wood powder，regenerated wood powder and the residua were quite different from each others. The regenerated wood appeared some micro voids special construction.

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].

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.

Preparation and Properties of ZnO by Ionic Liquid Assisted Sol-Gel Method

2012 ◽  
Vol 581-582 ◽  
pp. 578-581 ◽  
Author(s):  
Yan Li Jiang ◽  
Jia Yao Liu ◽  
Mei Tian ◽  
Li Juan Yang ◽  
Rui Hai Cui
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Rhodamine B ◽  
Sol Gel ◽  
Target Material ◽  
Nano Zno ◽  
Gel Method ◽  
Sol Gel Method ◽  
Before And After ◽  
Zno Powder

Zinc oxide nanopowder was prepared by sol-gel method using oxalic acid and zinc acetate as starting material for the first time. And Rhodamine B as the target material to study the different levels of ionic liquids on the photocatalytic performance of nano-ZnO. ZnO powder was determined by SEM and XRD for introduction of ionic liquids derived from nano-ZnO surface morphology and crystal before and after. The results show that nano-ZnO catalyst surface pores increased and grain refinement by adding ionic liquid which is conducive to nano-ZnO on the photocatalytic degradation of Rhodamine B.

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