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
Energy & Fuels
Yubing Liu, Jinfeng Chu, Lifei Lian, Xiang Chen, Sai An, Lanlan Hong, Dongqi Wang, Wei Chen
Summary: This study improved the catalytic materials for oxidative desulfurization reaction, with Al2O3-P2W15-Cn showing high efficiency in removing sulfur content within 9 minutes at 60 degrees Celsius. The catalyst exhibited excellent structural stability during the catalytic reaction, successfully removing 4,6-DMDBT and BT, with the outstanding performance of Al2O3-P2W15-C-18 confirmed by sulfur removal from an actual diesel sample.
Review
Energy & Fuels
Alireza Hosseini, Ali Khoshsima, Mazaher Sabzi, Ata Rostam
Summary: Fuel oil desulfurization is a challenging process in petroleum refineries due to economic considerations. Ionic liquids have been introduced as a beneficial alternative to traditional organic solvents. This review examines the application of ionic liquids in different desulfurization processes and reviews the governing factors in detail.
Article
Energy & Fuels
Guojia Yu, Xiaojia Wu, Lu Wei, Zhiyong Zhou, Wei Liu, Fan Zhang, Yixin Qu, Zhongqi Ren
Summary: Ionic liquids (ILs) are efficient green solvents for thiophene sulfides removal. In this study, several acidic ILs were synthesized and [NFM][TFA] showed excellent desulfurization efficiency. Through a proposed mechanism, [NFM][TFA] reacted with H2O2 to oxidize DBT in IL phase to corresponding sulfones.
Review
Energy & Fuels
Suman Tahir, Umair Yaqub Qazi, Zubera Naseem, Noor Tahir, Muhammad Zahid, Rahat Javaid, Imran Shahid
Summary: The increasing energy consumption has led to a rise in sulfur emissions, causing economic and health issues, as well as impacting the efficiency of diesel engine emission control systems. To combat this, research is being conducted on various desulfurization technologies, including conventional methods like hydrodesulfurization and alternative processes such as adsorptive, extractive, oxidative, and bio-desulfurization. Factors such as DES selection, extraction temperature, extraction time, DES regeneration, and multistage extractions play a crucial role in the desulfurization efficiency, with deep eutectic solvents showing promise as a less toxic and more efficient alternative for extractive desulfurization.
Article
Engineering, Chemical
Swapnil Dharaskar, Komal Desai, Kiran Kumar Tadi, Mika Sillanpaa
Summary: Sulfur reduction from fuels is crucial for environmental rules and petroleum refining. Extractive desulfurization using phosphonium ionic liquids, particularly [THTDP]Br, is effective for achieving low sulfur content. Various analytical techniques were employed to study the molecular confirmations and physical properties of [THTDP]Br, revealing its efficiency in removing sulfur compounds and ability to be recycled for multiple cycles.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Review
Engineering, Environmental
Fen Liu, Jiang Yu, Abdul Basit Qazi, Li Zhang, Xueke Liu
Summary: Ionic liquids (ILs) have attracted attention as novel functional desulfurization materials, with metal-based ILs (MILs) showing unique advantages in hydrophobicity, oxidation performance, and acidity for improved oxidative desulfurization. MILs possess absorption and oxidation centers for intramolecular adsorption and oxidation, improving the ODS process efficiency.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Hanxiang Chen, Shuting Hou, Haoyuan Cui, Chao Wang, Ming Zhang, Hongping Li, Hui Xu, Jiqing Wu, Wenshuai Zhu
Summary: The interfacial properties and active site distribution of catalysts have a significant impact on catalytic oxidative desulfurization activity, which has been a research focus in recent years. In this study, an amphiphilic and polyoxometalate poly(ionic liquids) were prepared through cross-linking copolymerization and ion exchange reaction for desulfurization in fuel. The resulting sample, p-C2VIM-DVB-2-PMo, exhibited enhanced desulfurization performance and good thermal stability, meeting the requirements for deep desulfurization. Density functional theory calculations were also utilized to investigate the adsorption strength and interaction nature between the cation and sulfide compounds.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Ning Yang, Linjie Lu, Linhua Zhu, Peiwen Wu, Duanjian Tao, Xiaowei Li, Jiahong Gong, Linlin Chen, Yanhong Chao, Wenshuai Zhu
Summary: The novel PIL HPMo@ZIF-8-PIL shows efficient removal of dibenzothiophene sulfur in model oil under room temperature using hydrogen peroxide as the catalyst and oxidant. It promotes dispersion of catalytically active sites and retains good liquidity and excellent extraction ability of ionic liquids. The successful preservation of porosity increases the probability of contact between the oxidant and active sites, enhancing desulfurization performance.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Applied
Jing He, Shuaishuai Zhou, Peiwen Wu, Yingcheng Wu, Lianwen He, Linhua Zhu, Wenshuai Zhu, Huaming Li
Summary: The interface properties of metal oxides significantly affect the catalyst activity in the removal of organic sulfur pollutants in diesel fuels. By refining the interface, the hydrophilicity of defective metal oxides can be improved. This study demonstrates the use of carbon nanotubes as solid modifiers to enhance catalytic performance.
FUEL PROCESSING TECHNOLOGY
(2022)
Article
Engineering, Environmental
Nan Jin, Jun Yue, Yuchao Zhao, Hongying Lu, Chengxiu Wang
Summary: The study focused on intensifying extractive desulfurization using microreactor, which succeeded in extracting aromatic heterocyclic sulfur compounds like dibenzothiophene from model diesel. The process achieved efficient desulfurization in a shorter time, with the extraction modeled based on a two-film model and investigation into the mechanisms for improved performance at higher temperatures or larger IL to MD flow ratios.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Environmental Sciences
Shichun Lin, Sue-Faye Ng, Wee-Jun Ong
Summary: This study analyzed the environmental impacts of the oxidative desulfurization (ODS) process catalyzed by metal-free reduced graphene oxide (rGO) through life cycle assessment (LCA). The results showed that rGO production and ODS process had significant impacts on human health, ecosystem, and resources.
ENVIRONMENTAL POLLUTION
(2021)
Article
Energy & Fuels
Dongao Zhu, Kun Zhu, Lixian Xu, Haiyan Huang, Jing He, Wenshuai Zhu, Huaming Li, Wei Jiang
Summary: In this study, cobalt-based metal-organic frameworks (Co-based MOFs) were used as supports and co-catalysts to confine the NHPI catalyst, solving the leaching issue. The NHPI@Co-MOF with carboxyl groups exhibited stronger acidity and facilitated the generation of active oxygen radicals O2•, resulting in enhanced catalytic activity. This research provides valuable insights into the selection of suitable organic linkers and broadens the research horizon of MOF hybrids in efficient oxidative desulfurization (ODS) applications.
Article
Chemistry, Multidisciplinary
Lifang Chen, Jin An Wang, Natali de la Fuente, Sinong Zhou, Peng Jiang, Yueqin Song, Xiaolong Zhou
Summary: This study focuses on the roles of structural defects, surface acidity, and catalytic properties of phosphotungstic acid grafted on Zr-doped MCM-41 catalysts in oxidative desulfurization, demonstrating the importance of these factors in improving catalytic activity for ultralow-sulfur fuel production.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Omid Azadi, Alireza Taheri, Ali Babaei
Summary: In this study, a catalytic oxidative desulfurization (CODS) process using an organic-inorganic hybrid nanocatalyst was proposed to remove thiophene (T) and benzothiophene (BT) from diesel fuel. The nanocatalyst, synthesized using CuO nanoparticles as a support and a mono copper-substituted polyoxotungstate ([PW11CuO39]) as an active component, showed high desulfurization efficiency. The experimental conditions for the CODS process were optimized using response surface methodology, and a removal efficiency of 98% for thiophene and 99% for benzothiophene was achieved. The synthesized heterogeneous nanocatalyst could be separated and recycled successfully, making it a promising strategy for the preparation of clean gasoline fuel.
MATERIALS CHEMISTRY AND PHYSICS
(2023)