Article
Engineering, Environmental
Yan Gao, Liangting Cheng, Ruimin Gao, Guangfa Hu, Jianshe Zhao
Summary: The study involves designing and preparing new polyionic liquid catalyst based on polyoxometalates, which shows high desulfurization activity. Additionally, supported catalysts were synthesized by loading polyoxometalate derivatives on the surface of graphene oxide, demonstrating excellent activity and recyclability in extraction-oxidation desulfurization.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Yan Gao, Diana Julia, Dinis F. Silva, Baltazar de Castro, Jianshe Zhao, Salete S. Balula
Summary: The use of peroxopolyoxometalates as oxidative catalysts in desulfurization systems has led to improved efficiency and sustainability. Specifically, Venturello peroxotungstate has shown superior performance in desulfurizing model diesel compared to analogues, with the ability to be reused for multiple cycles. This simple and cost-effective process allows for the reuse of catalyst and solvent without the need for additional techniques.
MOLECULAR CATALYSIS
(2021)
Article
Chemistry, Physical
Chao Sun, Yanli Zhang, Yasen Dai, Jiafu Xing, Yajuan Qu, Yinglong Wang, Jun Gao
Summary: Ionic liquids are used as extractants to efficiently and environmentally separate the azeotrope of ethyl acetate and ethanol. Through mechanism analysis, four ILs are selected as extractants and their separation performance is verified through experiments.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Xumin Wu, Jimin Wu, Jun Gao, Dongmei Xu, Lianzheng Zhang, Yixin Ma, Yinglong Wang
Summary: 2,2-difluoroethanol (DFE) is an important fine chemical in the chemical industry, but its regeneration from aqueous solution is challenging due to the formation of azeotropic mixture with water. This study investigated the use of hydrophobic imidazole-based ionic liquids as extraction agents to regenerate DFE from its aqueous mixture, showing promising results in terms of separating power and interaction energies.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Energy & Fuels
Hang Xu, Shaokang Wang, Fengmin Wu, Qinlin Yuan, Yafei Guo, Yinke Zhang, Xuefeng Wei, Jun Zhang
Summary: One disadvantage of using inorganic solid catalysts is the production of solid waste. This study developed a fully organic supported ionic liquid catalyst for desulfurization. The catalyst showed excellent dibenzothiophene removal efficiency and remained effective even after six regeneration cycles. The likely mechanism involves the extraction and oxidation of DBT by the catalyst/oxone system.
Article
Chemistry, Multidisciplinary
Chenchen Li, Dongmei Lu, Chao Wu
Summary: This study screened 127 reported ionic liquids for multi-molar SO2 absorption under harsh conditions, identifying a unique cooperative anion-SO2 interaction mode for branched anions. The research provides new insights for the design of task-specific ILs under harsh conditions, with potential sorbents identified for high overall capacity and per-cycle absorption capacity. Additionally, the energies of the reacting orbitals of the anions were found to be linearly correlated to their SO2 binding energies.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2021)
Article
Engineering, Chemical
Dongmei Xu, Shanshan He, Chengyi Yuan, Lijie Peng, Wenyang Fan, Huiwen Huang, Jun Gao, Yinglong Wang
Summary: In this study, liquid-liquid extraction was used to separate the mixture of IPAC and IPA, with three ionic liquids demonstrated as effective extractants, particularly [Bmim] [Hi(2)PO(4)]. The experimental data was fitted using the NRTL model to optimize the separation process for industrial applications.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Chemistry, Multidisciplinary
Yan Gao, Lilong Yang, Zhe Liu, Ruimin Gao, Guangfa Hu, Jianshe Zhao
Summary: A series of PIL-based POM salts were designed and synthesized, and supported catalysts were prepared for oxidative organic sulfide extraction in fuel oils. The supported catalyst showed better performance with maximum sulfur removal efficiencies up to 98.32% to 99.98%. The catalyst can be easily recovered and reused without significant activity decrease.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Engineering, Environmental
Kaihang Zhang, David Kujawski, Chris Spurrell, Dong Wang, Junchen Yan, John C. Crittenden
Summary: The introduction of ionic liquid [A336][NTf2] has been shown to improve the extraction efficiency of perfluorooctanoic acid (PFOA) and suppress emulsification from drinking water. The results demonstrate that [A336][NTf2] can effectively mitigate emulsification and achieve high extraction efficiency of up to 88.21wt% for PFOA under optimized conditions.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Argam Akopyan, Polina D. Polikarpova, Nina Arzyaeva, Alexander Anisimov, Olga Maslova, Olga Senko, Elena N. Efremenko
Summary: This study investigated the effect of the hydrophobicity of mesoporous silicate SBA-15 on the catalytic activity and service life in the peroxide oxidation of sulfur-containing compounds. The immobilization of molybdate anion on SBA-15 support resulted in lower reaction temperature and longer catalyst lifespan. The hydrophobic catalyst showed insensitivity to initial sulfur content and hydrogen peroxide amount, retaining activity for at least six oxidation cycles.
Article
Chemistry, Multidisciplinary
Qinghua Liu, Chengmin Gui, Guoxuan Li, Zhigang Lei
Summary: In order to improve the quality of fluid catalytic cracking (FCC) diesel, promising neoteric solvents called ionic liquids (ILs) were used to extract certain compounds from FCC model oil. The selection of the most suitable extraction solvent was based on various factors including thermodynamic and physical properties. Experimental data and theoretical calculations were used to understand the extraction mechanism and differences in efficiency for different compounds.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
N. Evelin Paucar, Peyton Kiggins, Bryson Blad, Karl De Jesus, Farjana Afrin, Srinath Pashikanti, Kavita Sharma
Summary: Ionic liquids have been developed as an effective method for extracting sulfur and nitrogen compounds from fuels, showing higher efficiency and selectivity compared to traditional processes. Despite limitations such as environmental biodegradation and bioaccumulation, they are still considered a promising technology for desulfurization and denitrogenation.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Energy & Fuels
Hang Xu, Anqi Niu, Zhewen Yang, Fengmin Wu, Xiaoxi Guo, Xuefeng Wei, Jun Zhang
Summary: Poly-ionic liquid catalyst combines the advantages of ionic liquid and polymer, overcoming the poor fluidity of ionic liquid. In this study, a polyvinyl-3-butylimidazolium cobalt chloride salt (poly-[BVIM][CoCl3]) ionic liquid catalyst was prepared and characterized. It showed excellent performance in catalytic oxidative desulfurization with potassium monopersulfate (PMS) as the oxidant.
Article
Engineering, Environmental
Hang Xu, Anqi Niu, Zihan Shang, Geng Li, Fengmin Wu, Xuefeng Wei, Jun Zhang
Summary: A heterogeneous catalyst with superparamagnetic properties and a multi-porous structure was prepared for efficient desulfurization of oil when coupled with peroxymonosulfate. The catalyst exhibited high desulfurization activity at a low temperature and maintained stability after multiple uses. The study also revealed the reaction mechanism of desulfurization.
CHEMICAL ENGINEERING JOURNAL
(2023)
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.
