Article
Chemistry, Physical
Ke Yu, Weimin Kong, Zhen Zhao, Aijun Duan, Lian Kong, Xilong Wang
Summary: Mesoporous yolk-shell silica spheres with different shell thicknesses and yolk sizes were synthesized and used as catalyst supports for hydrodesulfurization reactions. The results showed that the shell thickness and yolk size significantly affect the catalytic activity, with the NiMo/Al-Y30S13 catalyst exhibiting the highest activity. Additionally, the mechanisms of DBT and 4,6-DMDBT HDS over NiMo/Al-YxSy materials were proposed.
JOURNAL OF CATALYSIS
(2022)
Article
Energy & Fuels
Rupesh Singh, Deepak Kunzru, Sri Sivakumar
Summary: The research demonstrates that NiMoW trimetallic catalysts exhibit higher activity in hydrodesulfurization due to synergistic effect, which involves partial substitution of Mo by W during synthesis, as well as the use of ultrasmall size catalysts.
Article
Energy & Fuels
Cheng-Kun Xiao, Yu-Tong Zou, Dong-Ze Li, En-Hua Wang, Ao-Cheng Wang, Dao-Wei Gao, Ai-Jun Duan, Peng Zheng, Xi-Long Wang
Summary: A novel composite material TD composed of TS-1 microcrystalline and DMSNs was prepared, which had an open pore structure and large specific surface area. TD-70 exhibited the best desulfurization activity due to its large open pore structure, good acidity, and perfect dispersion of metallic active sites.
Article
Chemistry, Applied
J. Arturo Mendoza-Nieto, Alfredo Vizueth-Montes de Oca, Lina A. Calzada, Tatiana E. Klimova
Summary: In this study, different SBA-15 supports with varying compositions were used to prepare trimetallic CoMoW and NiMoW catalysts for deep hydrodesulfurization reactions. The addition of titania and zirconia to the supports resulted in higher catalytic activity, particularly for the Ni-promoted samples. Among these catalysts, NiMoW/Zr-SBA-15 showed the highest activity for sulfur removal, with twice the activity compared to NiMoW/SBA-15 analog. The dispersion of metal species on the sulfided NiMoW/Zr-SBA-15 sample was identified as the key factor contributing to its superior activity. Additionally, catalyst selectivity was found to be more dependent on the promoter used rather than the support's chemical composition.
Article
Energy & Fuels
Jin-Lin Mei, Yu Shi, Cheng-Kun Xiao, Ao-Cheng Wang, Ai-Jun Duan, Xi-Long Wang
Summary: Hierarchically porous Beta/SBA-16 (BS) composite materials were synthesized through a two-step in-situ assembly hydrothermal crystallization method, and NiMo catalysts supported on BS with different silica-alumina ratios were prepared. The catalysts exhibited high hydrodesulfurization activity due to the synergistic effects of various factors.
Article
Chemistry, Applied
Jiaxin Wu, Xianliang Meng, Ruizhi Chu, Deguang Yang, Xiao Li, Shi Yu, Jian Wang
Summary: A Pd composite catalyst with a micro-mesoporous structure was successfully prepared and applied to the hydrodesulfurization (HDS) of coal tar. The study found that the micro-mesoporous composite structure exhibited high sulfur resistance and anti-coking properties in the HDS reaction.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Shengnan Yue, Zequn Yin, Xingli Zou, Xiujing Zou, Xionggang Lu, Xueguang Wang
Summary: The effects of different precursor calcination temperatures on the physicochemical properties and catalytic performances of catalysts were investigated. It was found that an appropriate calcination temperature could improve the catalyst's pore structure, particle dispersion, and edge/rim sites ratio, leading to enhanced catalytic activity and stability.
Article
Energy & Fuels
Hanzhang Gong, Zhiwei Xiao, Yuan Zhuang, Shuqin Liang, Xiang Li, Weibo Zheng, Aijun Duan, Xiao Zhang, Jian Liu
Summary: A core-shell structured material consisting of a mesoporous aluminosilicate shell and mesopore-containing beta zeolite core was synthesized using triblock copolymer as template. The resulting Ni2P catalyst showed higher reaction rate constant and TOF in quinoline hydrodenitrogenation compared to other supported Ni2P catalysts. The unique properties of the core-shell support contributed to the smaller Ni2P cluster size and enhanced catalytic activity.
Article
Chemistry, Multidisciplinary
Abdulkadir Tanimu, Saheed A. Ganiyu, Ivan Kozhevnikov, Khalid Alhooshani
Summary: The sulfidation of NiMo catalyst by thermal decomposition of support surface-bound thiols to generate H2S is a clean and effective method for catalyst activation. The loading of thiol groups affects the formation and dispersion of MoS2 active phase on the support, and the interaction between thiol groups and Mo metal enhances metal dispersion on the thiol-containing support.
ARABIAN JOURNAL OF CHEMISTRY
(2021)
Article
Environmental Sciences
Xinsheng Li, Shuo Ai, Yongchun Huang, Chengdu Huang, Wanguo Yu, Zhijuan Mao
Summary: In this study, metallic copper loaded on SBA-15 mesoporous silica proved to be an efficient adsorbent for the removal of DBT in fuel oils. Analysis using Raman spectroscopy, XPS, and Auger spectroscopy provided insights into the interaction mechanism between DBT and copper, and the complete recovery of adsorption capacity was achieved successfully.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Tawfik A. Saleh, Saddam A. AL-Hammadi
Summary: The study focused on the catalytic efficiency of the AlMoGNi catalyst for the HDS of DBT, synthesized by loading Ni promoter on graphene and Mo catalyst on alumina separately, and then combining Ni/graphene with Mo/alumina. The AlMoGNi catalyst showed superior performance in reducing sulfur concentration in fuel compared to catalyst without graphene, attributed to its textural properties, surface acidity, and nanoparticle dispersion. The HDS process over the AlMoGNi catalyst involved hydrogenolysis and hydrogenation desulfurization pathways.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Peng Wang, Mengxiang Gan, Puhui Deng, Yongfen Xu, Yu Hou
Summary: Phosphotungstic acid-loaded zirconium dioxide (HPW@ZrO2) nanoparticles with excellent oxidative desulfurization performance were prepared and characterized. The material showed efficient removal of DBT from simulated oil and maintained good recyclability after multiple cycles. Additionally, it exhibited good desulfurization performance for gasoline as well.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Applied
Nushin Ettekali, Somaiyeh Allahyari, Nader Rahemi, Fahime Abedini
Summary: Micro-mesoporous SiO2 aerogel supported by MoO3 nanoparticles was used as a catalyst and adsorbent for the oxidation of dibenzothiophene (DBT), leading to enhanced catalytic activity and successful desulfurization of Iranian gasoil with noticeable reduction in sulfur-containing components. The characterization of the catalysts indicated uniform dispersion of MoO3 nanoparticles on the aerogel surface, with maintained crystalline structure despite decreased porosity in spent catalyst due to adsorption of DBT sulfones.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Energy & Fuels
Bo Wang, Zhentao Chen, Tao Jiang, Jiahuan Yu, Haoxuan Yang, Aijun Duan, Chunming Xu
Summary: This study investigates the diffusion behavior of organosulfur compounds in catalyst pore channels and reveals that the pore channel/cage sizes dominate the intraparticle diffusion. The effective diffusion coefficient decreases with decreasing pore size, but the intraparticle diffusion resistance can be greatly relieved when the catalyst pore/cage size is larger than 25 times the molecule size of the compounds. These findings present new opportunities for designing efficient silica-based HDS catalysts.
Article
Chemistry, Physical
Shuang Chu, Xiang Li, Roel Prins, Chunhua Wang, Yingya Liu, Anjie Wang, Qiang Sheng
Summary: Ultrasmall Ni2P nanoparticles supported on SiO2 and Al2O3-B2O3 were synthesized using Ni(NO3)2 and H3PO3 as precursors. The introduction of B2O3 to Al2O3 inhibited the formation of AlPO4 during reduction. The Ni-P/SiO2 catalysts with weak Ni2P-support interaction showed high activity, while the Ni-P/AB catalysts with strong Ni2P-support interaction exhibited lower activity.
JOURNAL OF CATALYSIS
(2023)
Article
Chemistry, Multidisciplinary
Bo Li, Jiahua Liu, Fucong Lyu, Zhiqin Deng, Bo Yi, Peng Du, Xi Yao, Guangyu Zhu, Zhengtao Xu, Jian Lu, Yang Yang Li
Summary: This study introduces a novel hydrogel synthesized from water and inorganic salts, offering high ionic conductivity and energy density. The gel is biocompatible and sheds light on prebiotic evolution.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Engineering, Chemical
Bo Wang, Zhentao Chen, Tao Jiang, Jiahuan Yu, Haoxuan Yang, Aijun Duan, Chunming Xu
Summary: This study synthesized a macromolecular organosulfur compound 2,8-DPPDBT and prepared three NiMo-supported SBA-15 catalysts with different pore sizes. The diffusion behaviors of the compound in the catalysts were investigated, and a correlation between effective diffusivity and the molecule-to-pore size ratio was proposed. This empirical correlation provides theoretical guidance for the design of efficient heavy oil hydrodesulfurization catalysts.
Article
Engineering, Environmental
Yu Chen, Manav Bhati, Benjamin W. Walls, Bo Wang, Michael S. Wong, Thomas P. Senftle
Summary: This study investigates the photocatalytic oxidation of perfluorocarboxylic acids (PFCA) on hexagonal boron nitride (hBN) and finds that longer-chain PFCAs are more effectively degraded due to stronger adsorption. The researchers also discover that a nitrogen-boron substitutional defect can enhance UVC absorption and PFCA oxidation on hBN.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Fucong Lyu, Zhe Jia, Shanshan Zeng, Fei-Xiang Ma, Lulu Pan, Lizi Cheng, Yan Bao, Ligang Sun, Weihui Ou, Peng Du, Yang Yang Li, Jian Lu
Summary: This study successfully synthesizes ultrathin P-doped Bi2MoO6 nanosheets via a wet-chemical synthesis approach. These nanosheets possess a unique amorphous/nanocrystalline dual-phase structure, with fast ion exchange ability and excellent volume change buffer capability. As electrode materials for lithium-ion batteries and sodium-ion batteries, the P-BiMO-6 electrode exhibits good reversible capacity and improved rate performance.
Article
Engineering, Environmental
Jordin Metz, Pengxiao Zuo, Bo Wang, Michael S. Wong, Pedro J. J. Alvarez
Summary: Combining ultraviolet light and chlorine can enhance the degradation of perfluorooctanoic acid (PFOA), a type of per- and polyfluoroalkyl substance (PFAS). This method not only increases the removal rate of PFOA, but also generates a significant amount of fluoride. Radical scavenger tests confirmed the important role of Cl· and Cl-2(·) in the degradation process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2022)
Article
Engineering, Chemical
Shuai Wang, Yipin Lv, Xilong Wang, Daowei Gao, Aijun Duan, Huaiqing Zhao, Peng Zheng, Guozhu Chen
Summary: A well-designed catalyst with platinum and gold encapsulated in zeolite was studied for semi-hydrogenation reaction. Gold nanoparticles and zeolite surface were identified as the active sites for the reaction, with the gold active site showing preferable selectivity for phenylacetylene and 1,5-cyclooctadiene.
Article
Engineering, Environmental
Lijie Duan, Bo Wang, Kimberly N. Heck, Chelsea A. Clark, Jinshan Wei, Minghao Wang, Jordin Metz, Gang Wu, Ah-Lim Tsai, Sujin Guo, Jacob Arredondo, Aditya D. Mohite, Thomas P. Senftle, Paul Westerhoff, Pedro Alvarez, Xianghua Wen, Yonghui Song, Michael S. Wong
Summary: Boron nitride (BN) has the property of degrading polyfluoroalkyl substances (PFAS) under UV-C irradiation. A composite material of BN and titanium oxide (TiO2) was created through calcination and showed enhanced photocatalytic activity for degrading perfluorooctanoic acid (PFOA) under UV-A. The composite material was found to facilitate charge carrier separation and degrade PFOA faster than TiO2 alone. Outdoor experimentation showed that the composite material could degrade PFOA in both deionized water and salt-containing water under natural sunlight.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Zhentao Chen, Bo Wang, Haoxuan Yang, Tao Jiang, Jiahuan Yu, Jianxun Wu, Chunming Xu
Summary: This study validates that the diffusion of vanadyl porphyrins is significantly hindered in catalyst pores, which has a pronounced effect on the reaction. The diffusion effect is larger for vanadyl-TPP than vanadyl octaethylporphine, attributed to its higher intrinsic activity and more severe diffusion resistance. The restrictive correlation is more severe than the theoretical prediction, resulting from the non-spherical configuration of reactants and simultaneous counter diffusion of products.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Zhentao Chen, Yuanfeng Wang, Jianxun Wu, Bo Wang, Tao Jiang, Jiahuan Yu, Haoxuan Yang, Suoqi Zhao, Quan Shi, Chunming Xu
Summary: This study systematically investigates the compositions and HDS reactivities of sulfur-containing compounds in two deasphalted oils using ESI FT-ICR MS combined with a self-established separation method. It reveals that sulfidic and thiophenic subfractions have similar HDS reactivities, while sulfur compounds in the polar subfractions are the least reactive.
Article
Energy & Fuels
Bo Wang, Zhentao Chen, Tao Jiang, Jiahuan Yu, Haoxuan Yang, Aijun Duan, Chunming Xu
Summary: This study investigates the diffusion behavior of organosulfur compounds in catalyst pore channels and reveals that the pore channel/cage sizes dominate the intraparticle diffusion. The effective diffusion coefficient decreases with decreasing pore size, but the intraparticle diffusion resistance can be greatly relieved when the catalyst pore/cage size is larger than 25 times the molecule size of the compounds. These findings present new opportunities for designing efficient silica-based HDS catalysts.
Article
Nanoscience & Nanotechnology
Enhua Wang, Yidong Song, Jinlin Mei, Aocheng Wang, Dongze Li, Shanbin Gao, Lili Jin, Hui Shang, Aijun Duan, Xilong Wang
Summary: Hydrogenation of naphthalene can effectively reduce aromatic content in oil, and Pt-based aluminum-modified core-shell-structured nanoparticles showed excellent performance in this process. The synthesized Pt/Al-x-PMOs@MSNs catalysts exhibited preferable mass transfer and increased total acidity, leading to high conversion and selectivity of trans-decalin. The presence of sulfur had a temporary negative effect on naphthalene hydrogenation, but the catalysts ultimately recovered their original performance due to their unique texture and chemical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Engineering, Chemical
Changze Yang, Hui Shang, Jun Li, Xiayu Fan, Jianchen Sun, Aijun Duan
Summary: This paper reviews the research status of microwave-assisted pyrolysis (MAP) of plastics to produce high-value-added liquid oil, gas, and solid carbon, analyzing the effects of plastic properties, microwave treatment parameters, microwave absorbers, co-pyrolysis, catalysts, and reactor devices on the process and the products. It is crucial to optimize the experimental design by studying microwave-assisted co-pyrolysis technology and the application of catalysts, understanding the mechanism of co-pyrolysis to improve product selectivity. Furthermore, the development of a continuous MAP device for large-scale plastics treatment and a large-scale simulation computing research platform is needed to enhance the efficiency of the process.
Article
Biotechnology & Applied Microbiology
Jan-Max Arana Juve, Bo Wang, Michael S. Wong, Mohammed Ateia, Zongsu Wei
Summary: The consensus on removing per-and polyfluoroalkyl substances (PFAS) from the environment is widely recognized and inspired by the near-zero standards released by the U.S. Environmental Protection Agency in 2023. Currently, existing technologies only partially defluorinate a limited number of PFAS, leading to the creation of potentially more toxic short-chain intermediates. This work discusses the need to broaden the scope of tested PFAS, provides an overview of state-of-the-art degradation technologies, and highlights the gaps in knowledge and technology that hinder complete defluorination.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Mojtaba Qanbarzadeh, Laura DiGiacomo, Ehsan Bouteh, Eman Z. Z. Alhamdan, Marc M. M. Mason, Bo Wang, Michael S. S. Wong, Ezra L. L. Cates
Summary: Hexagonal boron nitride (hBN) has been found to be more efficient than other catalysts in photocatalytic degradation of per-/polyfluoroalkyl substances (PFAS), especially at environmentally relevant concentrations. The strong performance of hBN under realistic water conditions suggests its potential as a treatment tool for PFAS contamination.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
