Article
Energy & Fuels
Naushad Khan, Vimal Chandra Srivastava
Summary: In this study, three deep eutectic solvents (DESs) were synthesized and utilized for extractive desulfurization (EDS), with a maximum sulfur extraction efficiency of 81.2% achieved under optimized conditions. The recyclability of DES affected the extraction efficiency, which was restored after regeneration. EDS kinetics were represented using pseudo first-, second-, and nth-order models.
Article
Energy & Fuels
Wenkang Ye, Tongmiao Wang
Summary: This study introduces a novel three-body deep eutectic solvent (DES) synthesized from nitromethylpyrrolidone (NMP) as a hydrogen bond acceptor (HBA) and benzoic acid (BEN) and water (H2O) as hydrogen bond donors (HBDs). It is used for extractive desulfurization (EDS) of model oil and analogue FCC gasoline. The results show that the three-body DES has higher activity, lower viscosity, and lower volatility, and the best desulfurization performance is achieved by a DES with a mass ratio of 8NMP/2BEN/0.06H2O containing 6 wt % water.
Article
Chemistry, Multidisciplinary
Ruth Dikki, Eda Cagli, Drace Penley, Metin Karayilan, Burcu Gurkan
Summary: Choline-based sorbents were developed for CO2 capture, and the impact of different molecular structures on regenerability was explored. Eutectic solvents were formed by mixing with ethylene glycol, enabling renewable regeneration. The study provides guidance for molecular design of eutectic sorbents.
CHEMICAL COMMUNICATIONS
(2023)
Review
Engineering, Environmental
Rashid Abro, Nusrat Kiran, Shoaib Ahmed, Atta Muhammad, Abdul Sattar Jatoi, Shaukat A. Mazari, Umme Salma, Natalia Plechkova
Summary: In the coming decades, the delivery of clean energy and its applications will be of utmost importance. Elimination of toxic emissions, particularly sulfur compounds, is essential for the survival of our planet. The use of extractive desulfurization (EDS) process with deep eutectic solvents (DESs) is a promising alternative to conventional hydrodesulfurization (HDS) technique. This review discusses the advantages and factors of EDS using DESs, as well as potential problems and flaws. DESs are recommended as preferable solvents for cleaner fuel oil production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Hemayat Shekaari, Mohammed Taghi Zafarani-Moattar, Masumeh Mokhtarpour, Saeid Faraji
Summary: Thermodynamic investigations provide insights into solute-solvent interactions for selecting appropriate solvents in pharmaceutical sciences. This study focused on measuring the density and speed of sound of phenytoin in ethanol/deep eutectic solvents, showing strong interactions between phenytoin and the solvent. The thermophysical parameters provided valuable information for assessing interactions in the solvent media.
SCIENTIFIC REPORTS
(2021)
Article
Chemistry, Physical
Lixian Xu, Yaping Luo, Hui Liu, Jie Yin, Hongping Li, Wei Jiang, Wenshuai Zhu, Huaming Li, Hongbing Ji
Summary: A novel amide-based deep eutectic solvent (DES) was synthesized and applied for desulfurization of fuels, showing high efficiency. Experimental and theoretical studies revealed the mechanism of desulfurization by this DES.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Engineering, Chemical
Wei-Wei Yan, Xian-Yong Wei, Meng-Xiao Wang, Zhi-Min Zong
Summary: This study discusses the extraction of heteroatom-containing aromatics using ILs/DESs from high-temperature coal tar. The structural effects of ILs/DESs on the separation of HACAs were investigated through experimental and computational chemistry. The goal is to develop ILs/DESs with high selectivities for different types of aromatics.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Farah Abu Hatab, Omar A. Z. Ibrahim, Samah E. E. Warrag, Ahmad S. Darwish, Tarek Lemaoui, M. Mujahid Alam, Taghreed Alsufyani, Violeta Jevtovic, Fawzi Banat, Shadi W. Hasan, Inas M. AlNashef, Byong-Hun Jeon, Yacine Benguerba
Summary: Deep eutectic solvents (DESs) have potential as solvents for various applications, but their recovery is influenced by economic and environmental factors. This study investigated the recovery of methyl triphenyl phosphonium bromide/triethylene glycol (MTPPB/TEG 1:4) after de-aromatization, desulfurization, and denitrogenation of fuels. The results showed that washing the DES with distilled water was more effective than stripping with n-heptane. Increasing the DES-to-regeneration solvent mass ratio and the number of wash cycles improved recovery. The regenerated DES exhibited similar extraction effectiveness to fresh DES.
Article
Chemistry, Physical
Mehran Rezaee, Farzaneh Feyzi, Mohammad Reza Dehghani
Summary: This study focused on the extractive desulfurization using Deep Eutectic Solvents (DES) as a new method for removing organosulfurs from hydrocarbon fuels. Two new DESs were synthesized and their structures were confirmed. Experimental results determined the optimal extraction temperature and the effect of fuel to DES mass ratio on extraction efficiency. Thermodynamic modeling using the Non Random Two Liquid (NRTL) activity coefficient model was implemented to predict ternary phase equilibrium data with high accuracy.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Environmental Sciences
Komal Desai, Swapnil Dharaskar, Jalaja Pandya, Satyam Shinde, Thummalapalli Gupta
Summary: Phosphonium-based ionic liquid (PIL) has been utilized as a catalyst and extractant for the sulfur removal of model oil (MO) in this study. The PIL acts as a reaction-induced self-separation catalyst. The optimal conditions for the ultrasound-assisted extractive/oxidative desulfurization (UEODS) catalyzed by PIL were investigated, and a kinetic study was performed. The results showed that PIL exhibited stability in DBT removal with various initial S-content, indicating its potential for practical applications.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Chiara Allegretti, Paola D'Arrigo, Francesco G. Gatti, Letizia A. M. Rossato, Eleonora Ruffini
Summary: H-1-NMR spin lattice relaxation times (T-1) measured by inversion recovery technique were used to determine the stoichiometric coefficient of trimethylglycine betaine/diol based deep eutectic solvents (DESs) including ethylene glycol, triethylene glycol, and 1,3-propandiol as H-bond donors. The maximum water content tolerated by the DESs before complete hydration was also determined. Furthermore, the method was validated by comparing the eutectic composition of the betaine/glycol system with that determined by differential scanning calorimetry analysis, and the stoichiometric coefficients were found to be identical.
Article
Chemistry, Physical
Yu Chen, Di Zhao, Yue Bai, Yaoting Duan, Cong Liu, Jiaming Gu, Xin Wang, Xuanchao Sun, Yuting Li, Lijuan Zhang
Summary: This study systematically investigates the refractive index of typical deep eutectic solvents (DESs) and analyzes the effects of hydrogen-bonding donor, hydrogen-bonding acceptor, mole ratio, and temperature. The results show that these factors have a significant impact on the refractive index, and the presence of water decreases the refractive index of all DESs studied.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Energy & Fuels
Divyam Jha, Pranjal Maheshwari, Yugank Singh, Mohd Belal Haider, Rakesh Kumar, M. S. Balathanigaimani
Summary: Extractive desulfurization has been found to be one of the most effective methods for desulfurizing liquid fuels. The factors that affect desulfurization include temperature, oil/ionic liquid (IL)/deep eutectic solvent (DES) mass ratio, extraction time, initial sulfur content, mutual solubilities, multiple cycles, and regeneration of used solvents in the extractive desulfurization (EDS) process. The results of this study are significant for solvent selection and setting criteria for the EDS process.
JOURNAL OF THE ENERGY INSTITUTE
(2023)
Article
Agricultural Engineering
Wei Tang, Caoxing Huang, Zhengyu Tang, Yu-Cai He
Summary: An efficient deep eutectic solvent (DES), synthesized using cetyltrimethylammonium bromide (CTAB) and ethylene glycol (EG), was used to enhance enzymatic saccharification of rape straw (RS). The optimized pretreatment parameters showed that the DES selectively removed lignin and xylan while preserving cellulose. DES pretreatment resulted in an increased enzymatic hydrolysis efficiency of RS by 46.0% due to the removal of 62.2% lignin and 53.2% xylan. The study also revealed that DES pretreatment improved cellulosic accessibility, reduced lignin hydrophobicity and surface area, and caused migration of cellulosic crystalline structure, contributing to enhanced enzymatic hydrolysis efficiency. Overall, this study presented an emerging method for the effective fractionation and valorization of lignocellulosic biomass within biorefinery technology.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Arash Abbasi, Farzaneh Feyzi
Summary: The synthesis of carboxylic-based deep eutectic solvents (DESs) for extractive catalytic oxidative desulfurization (ECODS) resulted in high sulfur removal efficiency, reaching up to 99.67% under optimal conditions. The Taguchi experimental design method was employed to determine critical parameters affecting the experiments, highlighting the importance of temperature, fuel to DES volume ratio, and oxidant to sulfur molar ratio.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Energy & Fuels
Sunil Kumar, Vimal Chandra Srivastava, Rohit Raghuvanshi, Shrikant Madhusudan Nanoti, Nisha Sudhir
Article
Thermodynamics
Nisha Sudhir, Pooja Yadav, Ruchika Sah, Bhagat Nautiyal, Prasenjit Ghosh, Shrikant Madhusudan Nanoti, Rakesh Singh
JOURNAL OF CHEMICAL AND ENGINEERING DATA
(2019)
Article
Energy & Fuels
Nisha Saini, B. R. Nautiyal, Rakesh Singh
Summary: Due to environmental concerns, there is a growing need to remove organosulfur compounds from transportation fuel. DESs have emerged as eco-friendly solvents with low toxicity and volatility, making them attractive for extraction processes. In this study, a series of DESs were synthesized and their extraction performance for sulfur in model and diesel fuels was investigated. Among all the DESs, [CHCl][TetEG](1:5) showed the best desulfurization efficiency for fuels.
PETROLEUM SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Applied
Nisha B. R. Nautiya, Pooja Yadav, Sunil Kumar, Rakesh Singh
INDIAN JOURNAL OF CHEMICAL TECHNOLOGY
(2019)
Article
Engineering, Multidisciplinary
YV Sood, PC Pande, S Tyagi, I Payra, Nisha, AG Kulkarni
JOURNAL OF SCIENTIFIC & INDUSTRIAL RESEARCH
(2005)
