Article
Chemistry, Multidisciplinary
Lixian Xu, Jie Yin, Yaping Luo, Hui Liu, Hongping Li, Linhua Zhu, Jing He, Wei Jiang, Wenshuai Zhu, Huaming Li
Summary: In this study, a novel DES based on caprolactam and tetrabutylammonium bromide was prepared and showed high desulfurization efficiency of 96.6% in diesel fuel. The extraction mechanism was investigated using spectroscopy techniques.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Mingyao Wu, Hongye Cheng, Lifang Chen, Zhiwen Qi
Summary: The separation of terpenoids from terpenes in citrus essential oils is essential for practical applications. This study evaluated the performance of 19 deep eutectic solvents in extractive deterpenation of model CEOs, with promising results from one particular DES TBAC:1,3BD(1:2).
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Andrey Shishov, Ivan Dubrovsky, Sergey Kirichenko, Andrey Bulatov
Summary: This study systematically investigated the stability and composition of deep eutectic solvents based on quaternary ammonium salts, terpenoids, and fatty acids in the aqueous phase. It was found that all two-component solvents transformed into three-component solvents in the presence of water. The influence of different hydrogen bond acceptors and donors on the formation of three-component solvents was also explored.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
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)
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
Chemistry, Physical
Tiantian Jiao, Chuhan Ren, Shaojie Lin, Lianzheng Zhang, Xianzhen Xu, Yaqing Zhang, Wenrui Zhang, Peng Liang
Summary: This study explored the extraction ability of different quaternary ammonium salts (QASs) on indole, and found that tetraethylammonium chloride (TEAC) can form deep eutectic solvents with indole. Quantum calculation was used to analyze the interaction forces between indole and QASs, and the conclusions were consistent with the experimental results. The mechanism research in this article provides important reference for the selection of applicable extractant and the prediction of separation efficiency.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
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
Chemistry, Physical
Xudong Zhang, Wenbo Zhao, Jun Shen, Yugao Wang, Gang Liu, Yanxia Niu, Qingtao Sheng
Summary: In this research, three quaternary ammonium salts were used to separate carbazole from model anthracene oil by forming deep eutectic solvents. The optimized conditions resulted in high extraction efficiency and purity of carbazole. Water was used for the regeneration of the quaternary ammonium salts, and the chemical interactions during the separation process were revealed. This method has implications for the separation of other high value-added products from coal tar.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Naushad Khan, Vimal Chandra Srivastava
Summary: In this study, three deep eutectic solvents (DESs) were synthesized and their structures were analyzed. These DESs were used for extractive desulfurization and the effect of ultrasound on the extraction process was investigated. The results showed that ultrasound enhanced the extraction efficiency of the DESs.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2022)
Review
Energy & Fuels
Amir Aghaei, Mohammad Amin Sobati
Summary: This study investigates various aspects of the extractive desulfurization process using ILs and DESs, including the physical and chemical properties of solvents, the structure of solvents, the role of oxidants and catalysts in the process, and experimental conditions. Regeneration issues related to ILs and DESs compared to traditional organic solvents are also discussed, along with challenges and associated problems in using ILs and DESs in the EDS process. Research gaps and future research directions are highlighted for further studies.
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
Chemistry, Physical
Verena Huber, Johnny Hioe, Didier Touraud, Werner Kunz
Summary: The solubility of curcumin in ethanolic solutions can be significantly increased by the addition of natural deep eutectic solvents (NADES). The study found that the addition of quaternary ammonium compounds can increase solubility, while the presence of functional groups in acids has a significant influence on solubility. The combination of non-specific and directed intermolecular interactions was identified as the key driving force for the enhanced solubility of curcumin. The NADES based on levulinic acid achieved the best results.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Chemical
Shu-Xian Zhu, Zhang-Min Li, Wen-Qiang Gong, Zi-Teng Gao, Hua Guan, Ming-Shuai Sun, Yan Zhou, Duan-Jian Tao
Summary: Due to inefficient pi-complexation of Cu+ sites, current available cuprous-based liquid absorbents have limited CO solubilities, which are far from equimolar CO capture. In this study, a novel cuprous-based quaternary deep eutectic solvent (DES) was prepared and used as a superior absorbent for equimolar CO capture. The cuprous-based quaternary DES [Emim]Cl-CuCl-ZnCl2-EG exhibited a remarkable CO uptake capacity (0.934 mol/mol, almost equimolar CO capture) and good ideal selectivities for CO/N2, CO/CO2, and CO/H2, making it the best liquid absorbent for efficient CO absorption.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Shengqin Guan, Zhiling Li, Baoen Xu, Juncheng Wu, Jie Han, Taotao Guan, Jianlong Wang, Kaixi Li
Summary: In this study, the influence of the electron density of hydrogen bond acceptor (HBA) on the formation of deep eutectic solvents (DESs) and the performance of oxidative desulfurization (EODS) was investigated. The desulfurization efficiency of phenol/formic acid (Ph/FA) DES under optimal conditions (30 degrees C, O/S = 2) can reach as high as 99.8%. This study not only provides a new aspect for designing and understanding DESs, but also offers a novel catalyst for efficient EODS.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Energy & Fuels
Filipa Lima, Luis C. Branco, Armando J. D. Silvestre, Isabel M. Marrucho
Summary: This review article presents the use of deep eutectic solvents (DES) in removing sulfur pollutants from transportation fuels, highlighting the urgent need to reduce the impact of fossil fuels impurities on outdoor air pollution. A comparative evaluation with Ionic Liquids (ILs) shows that DES has advantages in extracting sulfur contaminants, but the efficiency gap between simulated matrices and real fuels is still a challenge to be addressed.
Article
Environmental Sciences
P. R. Potti, V. C. Srivastava, P. Kumar, S. Das, N. Kumar, U. L. Stangar
Summary: This study synthesized Sn-doped ZnO photocatalysts using the solution combustion synthesis method and investigated the effects of different experimental parameters on the properties and degradation efficiency. The results showed that BET surface area and bandgap energy are the key factors influencing the degradation of dyes by Sn-doped ZnO.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Qicheng Qiao, Seema Singh, Ritesh Patidar, Lizhang Wang, Ya Li, Jian Shi, Vimal Chandra Srivastava, Shang-Lien Lo
Summary: The present study explored the roles of PDS radicals and SO4 center dot- radicals formed from SO42- during the electrochemical oxidation of PFOA. The study investigated the effects of different electrolytes, initial pH, current density, electrolyte dosage, and initial concentration of PFOA on the decomposition of PFOA using electrochemical oxidation. The results showed that (OH)-O-center dot induced oxidation and direct electron transfer reaction played a crucial role in the oxidation of PFOA.
Article
Engineering, Chemical
Nilambar Bariha, Deepak Kumar Ojha, Vimal Chandra Srivastava, Indra Mani Mishra
Summary: This article focuses on the analysis of risks associated with gas transfer operations in an LPG bottling plant in India. Due to urban expansion, these plants are now surrounded by residential and business areas. The frequency of transfer operations has also increased in order to maintain the supply chain. Accidental release of LPG during these operations can have severe consequences such as fire and explosions. The study classifies and analyzes the operations in various hazard zones and models the probability and consequences of accidents using tools like ALOHA and PHAST. The estimated thermal radiation can cause damage to nearby population and plant machinery.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Chemistry, Multidisciplinary
Ananda Jaysing Jadhav, Vimal Chandra Srivastava
Summary: In spectrophotometry, it is challenging to determine the concentration of chemical constituents in mixtures due to spectral interferences and close lambda max wavelengths. This paper presents a model based on a genetic algorithm and partial least squares to estimate the concentrations of components in ternary synthetic mixtures. The model was verified using different mixtures, and the results showed improved accuracy with the genetic algorithm.
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Anuj Rawat, Raeesh Muhammad, Vimal Chandra Srivastava, Paritosh Mohanty
Summary: The hypercrosslinking of benzene using formaldehyde dimethyl acetal as the crosslinker, anhydrous ferric chloride as the catalyst, and 1,2 dichloroethane as the solvent for the synthesis of poly-benz is reported. Microwave-assisted synthesis resulted in the formation of nanoporous poly-benz with a specific surface area of 1168 m2 g-1 within 60 minutes. Thorough analysis using NMR and XPS revealed the hypercrosslinking at the meta position of the benzene ring. The synthesized poly-benz showed a high CO2 capture capacity of 65.3 wt % at 298 K and 30 bar, and different adsorption isotherm models were fitted to represent the equilibrium CO2 adsorption data at various temperatures.
Article
Chemistry, Physical
Kavisha Dang, Navneet Kumar, Vimal Chandra Srivastava, Jinsub Park, Mu. Naushad
Summary: A series of CaO-MgO catalysts were prepared using different precipitating agents and Mg/Ca ratios. The physiochemical characteristics of the catalysts were analyzed using various techniques. The catalysts were tested for propylene carbonate synthesis and the effects of composition, dose, temperature, and contact time were investigated. The best catalyst achieved a high PC yield with good selectivity and reusability, showing potential for the synthesis of organic carbonates.
Article
Green & Sustainable Science & Technology
Mohammad Nasir, Praveen Kumar, Vimal Chandra Srivastava, Shilpi Verma, Ramanpreet Kaur, Indra Deo Mall, Urska Lavrencic Stangar
Summary: The adsorptive removal of 4-CBA using bagasse fly ash (BFA) was studied and compared with granular activated carbon (GAC). The optimum treatment conditions for BFA were found to be pH = 4, m = 9 g/L, Co = 100 mg/L, and t = 7.5 h, with a removal efficiency of 79% and adsorption uptake of 9.9 mg/g. BFA was determined to be a cost-effective adsorbent with high adsorption capacity and fast kinetics.
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2023)
Article
Green & Sustainable Science & Technology
Tanveer Rasool, Vimal Chandra Srivastava, Pratik Toshniwal, Ishfaq Najar, Vikash Singh
Summary: This study evaluated the kinetic and thermodynamic parameters of co-pyrolysis of wood pellets and petroleum coke blends. It was found that the reaction order increases with increasing heating rate, and the average activation energy was calculated to be 119.6 kJ mol-1 (OFW) and 126.2 kJ mol-1 (KAS). The values for ΔH, ΔG, and ΔS were consistent with previous studies, and ΔG was observed to be around 182 kJ mol-1. The study also identified the mechanisms of diffusion and chemical reaction during the thermal degradation process.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2023)
Article
Materials Science, Multidisciplinary
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: In this study, ellipsoid-shaped cupric oxide (CuO) nanoparticles were synthesized using a simple hydrothermal method and subsequent heat treatment. The catalysts showed excellent peroxymonosulfate (PMS) activation ability for the degradation of perfluorooctanoic acid (PFOA). Various operating parameters were investigated, and it was found that singlet oxygen (1O2) played a key role in the oxidative-reductive mechanism of PFOA degradation. Additionally, a two-step pseudo-first-order kinetic model was proposed and minimal metal leaching was observed after repeated use.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Green & Sustainable Science & Technology
Vikash Singh, Seon Yeong Park, Eun Seo Lee, Jun Ho Choi, Chang Gyun Kim, Vimal Chandra Srivastava
Summary: The co-combustion characteristics and synergy of distillery effluent sludge (DES) and sugar mill waste (SMW) were studied by thermogravimetric analysis. The blend of 25% DES and 75% SMW exhibited optimal combustion parameters and the presence of Fe, Ca, and Mg in DES facilitated effective combustion. The ash from the combustion process can be considered as a possible supplementary cementing material.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2023)
Article
Engineering, Environmental
Seema Singh, Praveen Kumar, Ritesh Patidar, Vimal Chandra Srivastava, Shang-Lien Lo, Urska Lavrencic Stangar
Summary: In this study, Co3O4 nanospheres with excellent surface properties were synthesized and used for the degradation of BPA. The nano-Co3O4/PMS system effectively degraded BPA (approximately 92%) at neutral pH with low cobalt leaching and good recyclability. Chemical quenching studies confirmed the involvement of hydroxyl radicals and sulfate radicals in BPA oxidation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Qicheng Qiao, Praveen Kumar, Ajay Singh, Shang-Lien Lo
Summary: This study synthesized low-toxicity and eco-friendly spherically shaped manganese oxides (alpha-MnO2, Mn2O3, and Mn3O4) using the chemical precipitation method. The variable oxidation states and diverse structures of manganese-based materials have a strong impact on electron transfer reactions. The as-prepared manganese oxides (MnOx) exhibited excellent catalytic activity for the degradation of rhodamine B (RhB) organic pollutant in the presence of peroxymonosulfate (PMS) under acidic conditions. The different oxidation states of MnOx promote oxidative-reductive reactions and the higher surface area provides ample absorption sites for pollutant interactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Pankaj Kumar, Vimal Chandra Srivastava
Summary: The size-dependent activity of catalysts has been investigated in catalysis for a long time. Positively charged small Pt clusters exhibit higher catalytic activity compared to larger clusters and bulk for propane dehydrogenation. Computational studies were performed on small Pt clusters adsorbed on silica support, revealing their planar structures and the formation of directional bonds with the support. Ethane and propane molecules undergo dehydrogenation reactions with different activation energies depending on the size of the Pt clusters and the mechanism followed.
Review
Engineering, Environmental
Seema Singh, Ritesh Patidar, Vimal Chandra Srivastava, Shang-Lien Lo, P. V. Nidheesh
Summary: This review presents the recent advancements in the electrochemical oxidation (EO) treatment of dyes, including the basic principles, the influence of operating parameters on treatment performance, the advantages and disadvantages of various anode materials, and the degradation mechanisms of dyes. The article also discusses the scale-up application, techno-economic issues, and future research challenges.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Thermodynamics
Shailesh Pandey, Vimal Chandra Srivastava, Vimal Kumar
Summary: This study models and simulates the production of methanol from coal gasification using three coal samples with different ash percentages. The study analyzes the effect of input parameters such as steam-to-coal ratio and gasification temperature on performance parameters and optimizes these parameters for maximum methanol yield and minimum greenhouse gas emissions. Economic investigation reveals that high-ash coal performs better in terms of profitability and production costs. The findings of this study are important for countries with substantial low-grade high-ash coal reserves to achieve sustainable methanol production through coal diversification.