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, 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
Chemistry, Applied
Teddy Roy, Julie Rousseau, Antoine Daudin, Gerhard Pirngruber, Benedicte Lebeau, Jean-Luc Blin, Sylvette Brunet
Summary: Mesostructured titania as a support for the CoMoS active phase enhances HDS activity and DDS selectivity, with temperature treatment significantly affecting catalyst activity. Higher activities are obtained after treatment at 380 degrees C, correlating with higher specific surface area and a semicrystalline anatase framework in the mesostructured TiO2 material.
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, Organic
V. V. Timoshkina, N. A. Vinogradov, A. A. Pimerzin, A. V. Vutolkina, A. P. Glotov
Summary: Mixed PMoV heteropoly acids of Keggin structure, H3+xPVxMo12-xO40 (x = 1-3), were synthesized, and alumina-supported sulfide catalysts were prepared. The catalytic properties of the catalysts in different reactions were studied.
PETROLEUM CHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Shengnan Yue, Baoqin Wu, Zhiyuan Cao, Linkai Zhou, Zequn Yin, Xiujing Zou, Xueguang Wang, Xingli Zou, Xionggang Lu
Summary: This study prepared cobalt-promoted molybdenum carbide supported on mesoporous alumina catalysts and systematically investigated the effects of cobalt on the physicochemical properties and hydrodesulfurization (HDS) performance of the catalysts. The results showed that suitable cobalt addition reduced the interaction between molybdenum species and alumina support, allowing for better carbonization of molybdenum. The introduction of cobalt made the molybdenum species electron-rich, resulting in easier attack on the C-S bond. The Co0.3Mo2C/MA catalyst exhibited significant sulfur removal efficiency and effective direct desulfurization selectivity.
JOURNAL OF CLEANER PRODUCTION
(2022)
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
Chemistry, Organic
V. V. Timoshkina, S. Yudintsev, E. D. Frenkel', A. A. Pimerzin
Summary: In this study, mixed PMoV heteropoly acids with Keggin structures and modified sulfide catalysts were synthesized and their performance in hydrodesulfurization (HDS) of dibenzothiophene (DBT) and hydrogenation of naphthalene was evaluated. The results showed that modification of the Mo-containing catalysts with vanadium using a solution of mixed heteropoly acids enhanced their catalytic activity and increased the selectivity for the direct hydrodesulfurization route of the DBT HDS reaction.
PETROLEUM CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Nertil Xhaferaj, Nicolo M. Ippolito, Fabio Maggiore, Francesco Ferella
Summary: The present study proposes a comprehensive recycling process for spent hydrodesulfurization (HDS) catalysts, successfully extracting molybdenum (Mo) and vanadium (V) and obtaining commercial-grade V2O5 and MoO3.
Article
Engineering, Environmental
Jianzhang Wang, Shaona Wang, Afolabi Olayiwola, Na Yang, Biao Liu, Jan J. Weigand, Marco Wenzel, Hao Du
Summary: A process of blank roasting-alkaline leaching is proposed to recover spent hydrodesulfurization (HDS) catalysts, with promising results of high leaching efficiency for vanadium, molybdenum, and aluminum under different roasting conditions. The method offers flexibility in controlling leaching of V, Mo, and Al, and achieves clean separation of metals, providing fundamental information for future development of more efficient and cleaner technologies.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Applied
Di Zhang, Xin-Mei Liu, Yu-Xiang Liu, Zi-Feng Yan
Summary: The pore structure significantly influences the performance of Ni-Mo/γ-Al2O3 catalyst and the desulfurization pathway of 4,6-dimethyldibenzothiophene. By adjusting the pore size, the reducibility of Mo species and the Ni-Mo-S structure can be modified, resulting in different reaction pathways and efficiencies. The design of deep desulfurization catalysts for environmental protection can be optimized based on these findings.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Abdullah Ozkan
Summary: Crude oil, a liquid hydrocarbon formed by the metamorphosis of organic matter on earth, releases air pollutants during the refining process. To reduce sulfur compounds in crude oil, researchers conducted an experiment and found that the desulphurization efficiency ranged from 2.47% to 5.44%.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Inorganic & Nuclear
Yin-Hua Zhu, Jian-Bo Yang, Xiao-Mei Liu, Ji-Lei Wang, Qing-Dong Ping, Ze-Yu Du, Jia-Nian Li, Ting-Ting Zang, Hua Mei, Yan Xu
Summary: This study successfully synthesized two novel zinc-capped polyoxo-metalate-based organic-inorganic hybrids with high catalytic properties for sulfur oxidation and carbon dioxide cycloaddition reactions.
DALTON TRANSACTIONS
(2022)
Article
Chemistry, Applied
R. Huirache-Acuna, R. M. Navarro Yerga, B. Pawelec
Summary: In this study, Co-promoted MoS2 catalysts supported on Al-modified mesoporous silica have been prepared and their catalytic activity in the hydrodesulfurization (HDS) reaction of dibenzothiophene (DBT) was investigated. The results showed that the support morphology and Al incorporation method have a significant impact on the catalyst's activity.
TOPICS IN CATALYSIS
(2022)
Article
Materials Science, Multidisciplinary
Xin Liang, Junjie Tang, Laishi Li, Yusheng Wu
Summary: This paper presents a method for the comprehensive recovery of valuable metals from spent Al2O3-based catalysts by using sodium carbonate roasting and water leaching. The results show that roasting is a critical factor influencing the leaching effect, as it converts insoluble compounds into soluble ones. The recoveries of Al and V reach 99.64% and 99.24% respectively under the optimal leaching conditions. The metal composition in the leachate and residue favors metal recovery compared to direct recovery from the spent catalyst. The addition of stoichiometric Ba(OH)(2) allows for the selective recovery of V, followed by the recovery of Al and Ni through precipitation and calcination.
Article
Chemistry, Physical
Yifan Sun, Ye Lv, Wei Li, Jinli Zhang, Yan Fu
Summary: In this study, PtRu electrocatalysts were fabricated on carbon paper via cyclic electrodeposition for the electrocatalytic hydrogenation (ECH) of phenol. The Pt3Ru3 catalyst exhibited excellent activity and stability for the conversion of phenol to cyclohexanol at ambient temperature and various current densities. The in situ Raman spectroscopy and kinetic study revealed the hydrogenation mechanism of phenol over Pt3Ru3 in acidic electrolyte, providing an effective electrochemical strategy for the facile construction of durable electrode materials and efficient phenol hydrogenation.
JOURNAL OF CATALYSIS
(2024)
Article
Chemistry, Physical
Amir Shahzad, Khezina Rafiq, Muhammad Zeeshan Abid, Naseem Ahmad Khan, Syed Shoaib Ahmad Shah, Raed H. Althomali, Abdul Rauf, Ejaz Hussain
Summary: Photocatalytic hydrogen production through water splitting is an effective method for meeting future energy demands. In this study, researchers synthesized a 1 % Ag2S/Cu2S co-doped CdZnS catalyst and found that it can produce hydrogen at a higher rate. The co-doping of Ag2S and Cu2S in the CdZnS catalyst showed a synergistic effect, with Ag2S promoting oxidation reactions and Cu2S promoting reduction reactions.
JOURNAL OF CATALYSIS
(2024)
