Article
Chemistry, Multidisciplinary
Venkatachalam Ramkumar, Ramesh L. Gardas
Summary: The crystallization of ionic liquids is crucial for understanding their molecular interactions and enhancing their capability for CO2 absorption. This study investigates the network formation and intermolecular interactions in viscous ILs by synthesizing TMG-based ILs and determining their structures using in-situ cryo-crystallization technique. The dominance of intermolecular atomic contacts is visualized through Hirshfeld surface analysis.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Engineering, Chemical
Fei-Feng Mao, Yan Zhou, Wenshuai Zhu, Xiao-Yan Sang, Zhang-Min Li, Duan-Jian Tao
Summary: A novel type of guanidinium-based poly(ionic liquid) with nonporosity was designed and prepared, showing high SO2 capacity and selectivity while excluding adsorption of CO2 and N-2. The nonporous poly(ionic liquids) demonstrated excellent performance in removing SO2 from flue gas.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Jiawen Li, Chao Wang, Haoyu Wu, Jiaxuan Zhang, Ming Zhang, Qian Zhu, Yiqun Fan, Hui Liu, Wenshuai Zhu
Summary: Using alkaline ternary deep eutectic solvents (DESs) as absorbents, an effective and reversible strategy for capturing and recycling SO2 was proposed, showing great potential for environmental protection and high-value utilization.
Article
Polymer Science
Xian-Chao Jin, Tian-Jun Yue, Bai-Hao Ren, Wei-Min Ren, Xiao-Bing Lu
Summary: In this study, a novel thermoplastic polyurethane (TPU) elastomer was developed using a polysulfite oligomer derived from the copolymerization of SO2 and propylene oxide (PO) as the soft segments (SSs). It was found that increasing the hard segment (HS) content improved tensile strength but reduced stretchability when the SS molecular weight was constant. On the other hand, both tensile strength and stretchability decreased with increasing SS molecular weight when the HS content was constant. The SO2-based TPU elastomers exhibited superior mechanical properties compared to poly(propylene oxide)-based TPU elastomers obtained via the same method, making it an attractive option for utilizing SO2.
Article
Biochemical Research Methods
Jie Yin, Jinrui Zhang, Wendi Fu, Ding Jiang, Naixia Lv, Hui Liu, Hongping Li, Wenshuai Zhu
Summary: The absorption mechanism of SO2 by porous ionic liquids was studied through DFT, revealing the strongest adsorptive interaction between the canopy and silica sphere, with hydrogen bonding and at-hole bonding as the main forces. Increasing the degree of polymerization of the canopy, by increasing the number of ether groups, is beneficial to SO2 absorption.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2021)
Article
Thermodynamics
Changgeng Sun, Shaokun Tang
Summary: This paper investigates the effects of four guanidinium di an de-based ene c salts as energetic additives to a hypergolic ionic fluid. The salts were found to significantly improve the density and specific impulse of the fluid.
COMBUSTION AND FLAME
(2021)
Article
Engineering, Environmental
Zeyu Geng, Qin Xie, Zhongjiao Fan, Weining Sun, Wei Zhao, Junhao Zhang, Jianqiu Chen, Yun Xu
Summary: Four tertiary amine-based protic ionic liquids have been designed and tested for SO2 uptake, showing a high capacity for SO2 and a high selectivity for SO2/CO2 separation. The kinetic study demonstrated their efficient and quick absorption of SO2 under ambient pressure. Due to their excellent recyclability and fast absorption process, these PILs are considered as a potential alternative to traditional absorbents in flue gas desulfurization (FGD).
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Bingru Wang, Long Lin, Shuhang Ren, Weize Wu
Summary: This study measured the specific heat capacities of six ILs and found that the specific heat capacities of ILs increase with temperature regardless of the presence of absorbed SO2. The specific heat capacity of ILs also increases with the amount of absorbed SO2. Additionally, the length of anionic alkyl side chains in ILs affects the specific heat capacity of SO2 absorption.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Zonghua Wang, Dezhong Yang
Summary: This work reports the high SO2 capture capacity of 2-pyridineethanol and investigates the effects of temperature and pressure on its absorption process. The findings show that 2-pyridineethanol has a high SO2 capacity, low energy cost regeneration process, excellent reversibility, and reacts with SO2 to form a zwitterionic sulfite. These findings are valuable in the design of efficient absorbents for SO2 capture.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Ruisong Zhu, Guoxuan Li, Zhigang Lei, Chengmin Gui
Summary: This study investigated the thermodynamic feasibility, absorption results, and molecular mechanism of capturing SO2 with mixed ionic liquids (MILs) for [EMIM][SCN] and [EMIM][Cl]. It was found that adding [EMIM][Cl] to [EMIM][SCN] could increase the SO2 absorption capacity, and van der Waals force played a leading role in the process of SO2 absorption. Molecular dynamics simulations further analyzed the interaction between molecules and the distribution state in terms of interaction energy, radial distribution functions (RDFs), and spatial distribution functions (SDFs).
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Mehraj Ud Din Parray, Suliman Yousef AlOmar, Afrah Alkhuriji, Farooq Ahmad Wani, Zahoor Ahmad Parray, Rajan Patel
Summary: The study investigated the refolding ability of pyridinium based ionic liquids against chemically induced unfolding of bovine serum albumin (BSA). Experimental results showed that the presence of ionic liquids facilitated the refolding of denatured proteins, with 1-butyl pyridinium bromide (BPB) being the most effective refolding agent among the three ILs utilized in the study.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Jocasta Avila, Chiara Corsini, Cintia M. Correa, Martin Rosenthal, Agilio Padua, Margarida Costa Gomes
Summary: This Perspective highlights the pathways to prepare porous ionic liquids using easily accessible materials for reduced environmental impact. The study demonstrates that suspensions of porous solids are stable in eutectic mixtures, which indicates their potential in preparing porous ionic liquids. Porous ionic liquids maintain the wide electrochemical window observed in their precursor pure ionic liquids, making them suitable for green electrochemical reactions, especially those involving gases with enhanced solubility in the porous suspensions. Furthermore, their capacity as gas-rich media suggests potential sustainable biomedical and pharmaceutical applications, provided that non-toxic, biocompatible ionic liquids and porous solids are utilized.
Article
Engineering, Environmental
Jialan Ji, Wenjie Xiong, Xiaomin Zhang, Lingling Peng, Mingzhen Shi, Youting Wu, Xingbang Hu
Summary: With the increasing emissions of NF3 during the expansion of the electronic industry, finding a way to capture NF3 has become urgent. This study made a pioneering attempt to capture NF3 in Lewis acidic ionic liquids (LAILs), and found that [Omim][Fe2Cl7] LAILs exhibited high NF3 solubility under specific conditions, providing a novel insight into NF3 capture.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Cristian Moya, Ruben Santiago, Daniel Hospital-Benito, Jesus Lemus, Jose Palomar
Summary: Biogas upgrading is the process of removing impurities to obtain high-quality biomethane, with no predominant technology currently available. In this study, an IL-based CO2 chemical absorption process was tested to achieve high purity biomethane. Optimal specific energy consumption was found at specific operating temperatures and pressures in both the absorber and stripper columns, showing potential for cost savings and efficient removal of impurities.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Mi Zhang, Bei Dong, Yu Wu, Hui Hu, Hao Huang
Summary: Amino-functionalized ILs are promising absorbents for H2S, and in this study, three triethylenetetramine functionalized ionic liquids (TETAH-ILs) were synthesized and mixed with ethylene glycol (EG) to form solutions. Among the [TETAH][HCOO]-EG, [TETAH][BF4]-EG, and [TETAH]Br-EG absorbents, [TETAH][BF4]-EG exhibited the highest H2S absorption capacity. Various factors, including IL molar fraction, absorption temperature, and H2S flow rate, were investigated to evaluate their effects on the absorption performance of [TETAH][BF4]-EG. The results showed that the 10% [TETAH][BF4]-EG mixed solution had excellent absorption capacity at 303.15 K and 100 mL/min. Additionally, the absorbent retained 75.12% absorption capacity after four regenerations, indicating its potential for reversibility. The mechanism of H2S absorption by TETAH-ILs was proposed based on FT-IR and H-1 NMR characterization and theoretical calculation, revealing the formation of IL-H2S complexes through a series of hydrogen bonds.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
