Article
Chemistry, Multidisciplinary
Yang Chen, Qi Tian, Yongsheng Tian, Jiawei Cui, Guanghui Wang
Summary: A nickel-silver oxide supported molybdenum catalyst with mesoporous silica was prepared and used for desulfurization of dibenzothiophene, benzothiophene, and 4,6-dimethyldibenzothiophene in a hydrogen peroxide system. The catalyst showed excellent oxidation desulfurization performance, with the reaction products being DBTO2, BTO2, and 4,6-DMDBTO2. Recycling experiments demonstrated high removal efficiency even after five cycles, indicating promising potential for practical applications.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Bao Wang, Lihua Kang, Mingyuan Zhu
Summary: A hierarchical porous carbon material (HPC) with ultra-high specific surface area was synthesized using sisal fiber (SF) as a precursor, and HPW catalyst was successfully immobilized on the support of SF-HPC. Characterization showed that the material had high surface area, micropores, and macropores, with HPW well-dispersed on the surface, leading to excellent catalytic performance. The desulfurization rate reached nearly 100% under optimal conditions and remained above 94% after four cycles.
Article
Chemistry, Multidisciplinary
Xingjian Liu, Jingwen Li, Yanwen Guo, Jiang Wu, Bing Hu
Summary: In this study, a novel phosphotungstic acid based dicationic ionic liquid immobilized on graphitic carbon nitride was prepared and applied in the deep desulfurization of fuel oil. The catalyst exhibited excellent catalytic performance and could achieve a conversion rate of dibenzothiophene (DBT) of over 99%. The catalytic activity of the catalyst varied for different sulfides, and it could be reused multiple times without a significant decrease in activity.
REACTION CHEMISTRY & ENGINEERING
(2022)
Review
Chemistry, Physical
Nataliya V. V. Maksimchuk, Oxana A. A. Kholdeeva
Summary: Polyoxometalates (POMs) are transition metal oxygen anionic clusters with oxidative and thermal stability, tunable acid and redox properties, solubility, and functionality. They have potential as homogeneous catalysts and building blocks for heterogeneous selective oxidations catalysts. Immobilizing POM catalysts on solid supports provide advantages of easy separation and reuse, important for sustainable chemistry. This article provides an overview of recent advances in liquid-phase selective oxidation using supported POMs and hydrogen peroxide, focusing on catalyst stability and reusability.
Article
Chemistry, Applied
Lei Chen, Zhong-Pan Hu, Jin-Tao Ren, Zheng Wang, Zhong-Yong Yuan
Summary: Mesoporous titanium phosphonates (MTP) were synthesized as support for molybdenum oxides in oxidative desulfurization (ODS) reactions. The electron-donating effect of organophosphonate ligands on Mo active sites led to high electron density, improving the efficiency and stability of ODS reactions.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Engineering, Chemical
Fei Yan, Xiaohan Guo, Qingying Ye, Ping Li, Juanjuan Qi, Lidong Wang
Summary: In this study, supported molybdenum oxide catalysts were prepared and characterized for the efficient oxidation of DMSO in wastewater using green oxidant, H2O2. The degradation product of DMSO, DMSO2, is environmentally friendly and biodegradable, making it suitable for further removal by biological processes. The results demonstrate the potential of this catalyst for treating industrial wastewater containing DMSO.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Energy & Fuels
Reem Ghubayra, Rana Yahya, Elena F. Kozhevnikova, Ivan Kozhevnikov
Summary: The Keggin-type heteropoly acids H3PMo12O40 and H3PW12O40 supported on activated carbon demonstrated high catalytic activity for oxidative desulfurization of model diesel fuel, influenced by the basicity of the carbon support. These catalysts, particularly the decomposed H3PW12O40, outperformed other heterogeneous catalysts for ODS by efficiently removing DBT from the fuel with high H2O2 efficiency and the ability to be recovered and reused without loss of activity. Additionally, DRIFTS studies provided insight into the mechanism of ODS reaction on carbon-supported HPAs.
Article
Chemistry, Physical
Sina Akbari Moghadam, Golshan Mazloom, Azam Akbari, Farhad Banisharif
Summary: By synthesizing HY zeolite/alumina composites containing both micro and meso-pores, diffusion limitations caused by small pore size in HY zeolite were successfully overcome in the oxidative desulfurization process, resulting in improved efficiency in handling bulky sulfur compounds. The extrusion method notably enhanced the weak acid sites of the catalyst, leading to better removal of refractory sulfur compounds.
MOLECULAR CATALYSIS
(2022)
Article
Engineering, Environmental
Jucai Wei, Du Yuan, Xu Wu
Summary: The direct electrosynthesis of hydrogen peroxide from the air is a promising alternative to the energy-intensive anthraquinone process. However, current methods suffer from low productivity and high energy consumption. In this study, a continuous flow sulfite/air fuel cell with a sulfite depolarized anode is proposed as a direct synthesis strategy. By optimizing catalysts and cell parameters, the prototype cell achieved high selectivity and productivity, with low energy consumption. The desulfurization solution from the flue gas desulfurization process is applied as the anolyte, further enhancing hydrogen peroxide synthesis and recovering sulfur as fertilizer.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Applied
Ming Zhao, Jinchang Sun, Xiaohong Li, Qianwen Zhang
Summary: By adjusting the calcination temperature of the alumina supporter and adding S precursors, the catalytic performance of the iron-based catalyst for the direct synthesis of light olefins from syngas can be optimized.
Article
Engineering, Environmental
Shengnan Yue, Dongfei Xu, Yao Sheng, Zequn Yin, Xiujing Zou, Xueguang Wang, Xingli Zou, Xionggang Lu
Summary: The Mo2C/gamma-MA catalyst exhibits high catalytic activity and stability for thiophene hydrodesulfurization, attributed to the small Mo2C nanoparticles formation, appropriate surface acidity, and strong interaction between Mo2C species and alumina inhibiting sulfurization.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
Moslem Ahmadian, Mansoor Anbia
Summary: In this study, mesoporous silica SBA-15 and MOR-SBA-15 supported catalysts were successfully fabricated and characterized. The catalytic performance of the synthesized catalysts for oxidative desulfurization was investigated, and the factors affecting the desulfurization process were evaluated. The results showed that the Cu/MOR-SBA-15 catalyst exhibited excellent desulfurization activity and reusability.
Article
Chemistry, Physical
Xiang Gao, Wei Jiang, Xin An, Kun Zhu, Linhua Zhu, Peiwen Wu, Wenshuai Zhu, Huaming Li
Summary: NHPI/PC catalysts, loaded with organic molecular catalyst NHPI on the surface of petroleum coke-based porous carbon, showed high efficiency and recyclability in aerobic oxidative desulfurization of model diesel oil under optimal conditions. The catalyst exhibited strong adsorption of oxidative products, resulting in a significant decrease in sulfur content. Free radical trapping experiments confirmed the presence of superoxide radicals as the main active species. Reusability tests demonstrated the catalyst's potential for industrial application after 9 cycles. Actual diesel oil sulfur content could be reduced from 852 mg kg(-1) to 91 mg kg(-1) with the catalyst, indicating promising industrial prospects.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Physical
Ilkay Gumus, Yasar Karatas, Mehmet Gulcan
Summary: In this work, a new composite material MoOx/MIL-101(Cr) was successfully synthesized for the oxidative desulfurization (ODS) process to remove refractory S-compounds (RSCs) from fuels. The catalyst exhibited remarkable catalytic activity and stability, and the ODS efficiency was found to be related to the formation of Mo5+ species and electron transfer to Mo6+ ions from Lewis acid sites. The study provided insights into the reaction mechanism and confirmed the usefulness of MoOx/MIL-101(Cr) in ODS.
MOLECULAR CATALYSIS
(2022)
Article
Energy & Fuels
Yefeng Liu, Peng Zuo, Ruixin Wang, Weizhou Jiao
Summary: A composite material with small and well-distributed molybdenum carbide nanoparticles was prepared via carbonization. The material exhibited excellent oxidative desulfurization performance and achieved ultra-deep desulfurization of fuel. Catalytic oxidation played a dominant role in the process.
Article
Energy & Fuels
Qianwen Dong, Bing Sun, Zhijun Dong, Yongsheng Tian, Hui Zhu, Guanming Yuan, Ye Cong, Baoliu Li, Jianguang Guo, Xuanke Li
Summary: A novel strategy is proposed in this study to prepare EG/PW binary PCCs with high thermal conductivity and excellent phase change behavior by constructing highly oriented graphite sheets inside the composites. The resulting EG/PW PCCs exhibit significantly improved thermal conductivity and excellent compatibility, uniformity, thermostability, and reliability.