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
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
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
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
Engineering, Environmental
Chengkun Xiao, Shaotong Song, Yutong Zou, Enhua Wang, Aocheng Wang, Yidong Song, Jian Liu, Aijun Duan, Peng Zheng, Xilong Wang
Summary: Low-cost pure aluminum-based Al-TUD-1 mesoporous materials were successfully synthesized and modified with Citric acid to form NiMo/AT catalysts for DBT and 4,6-DMDBT HDS reactions. The NiMoCA(2)/AT catalyst showed superior performance with improved HDS activity and selectivity, achieving maximal efficiency and TOF values at WHSV of 10 h-1.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Yuanyuan Zhang, Yaomei Fu, Liang Zhao, Chao Qin, Xinlong Wang, Baoli Li
Summary: Keggin-type polyoxometalates are excellent building blocks for multifunctional hybrids. Two new calixarene-supported Keggin-type polyoxometalates with pineapple-like shapes have been synthesized, and they show good catalytic performance in the oxidation of thioethers.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Xilong Wang, Chengkun Xiao, Mohnnad H. Alabsi, Peng Zheng, Zhengkai Cao, Jinlin Mei, Yu Shi, Aijun Duan, Daowei Gao, Kuo-Wei Huang, Chunming Xu
Summary: A metal confinement catalyst MoS2/Pt@TD-6%Ti with dendritic hierarchical pore structures was synthesized and showed excellent sulfur-resistance performance and stability in catalytic hydrodesulfurization reactions. The catalyst combines the Pt-confinement effect and hydrogen spillover of Pt noble metal, allowing for efficient migration and dissociation of small H2 molecules while keeping sulfur-containing compounds outside. This new concept of combining the H2 dissociation performance of noble metal catalyst with the desulfurization ability of transition metal sulfide MoS2 provides higher activities for desulfurization at a lower cost.
GREEN ENERGY & ENVIRONMENT
(2022)
Article
Engineering, Chemical
Julio Cesar Garcia-Martinez, Gerardo Chavez-Esquivel, Jose Antonio Colin-Luna, Jose Antonio de los Reyes-heredia
Summary: This work studied the influence of pressure and temperature on reactive distillation (RD) under lower conditions than conventional hydrotreating (HDT) processes, as well as the hydrodesulfurization (HDS) reaction of 4,6-dimethyldibenzothiophene (4,6-DMDBT) molecule and the experimental performance of a down-flow micro trickle bed reactor (micro-TBR) with n-dodecane and decalin. The results showed that using n-dodecane as a solvent resulted in higher conversion rates compared to using decalin, which was due to the higher liquid hydrogen fraction in n-dodecane.
INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
He Ma, Dandan Qin, Chun Shang, Yunzhuo Lu
Summary: In this study, a layered metallic glass composite with high yield strength and compression ductility was successfully synthesized via laser additive manufacturing. The unique structure and asynchronous deformation of the material contribute to its remarkable mechanical properties, offering a new paradigm for designing engineered materials with excellent strength and ductility.
Article
Chemistry, Multidisciplinary
Xiantao Niu, Weixia Zhou, Yuanyuan Han, Yongjun Liu
Summary: In this study, CoMoS catalysts with controllable morphology were prepared using a single-source hydrothermal method. The coordination between the metal atom and DDTC was found to effectively control the crystal growth of MoS2 and promote the formation of the active phase. Catalysts with fewer stacking layers of MoS2 slabs showed increased conversion efficiency for HDS activity.
Article
Energy & Fuels
Ji-Xing Liu, Xiang-Qi Liu, Ri-Xin Yan, Ling-Feng Jia, Hui-Fang Cheng, Hui Liu, Yan Huang, Ming-Qing Hua, Hua-Ming Li, Wen-Shuai Zhu
Summary: In this study, a mesoporous LaAlOx catalyst was designed and constructed through a solvent evaporation-induced self-assembly method. The structure and physicochemical properties of the NiMo supported catalyst were characterized, and its catalytic activity for hydrodesulfurization (HDS) was investigated. The incorporation of La was found to significantly enhance the generation of Type II NiMoS phase, leading to improved HDS performance by promoting sulfidation and modifying the morphology of Ni promoted MoS2 slabs. This finding contributes to the understanding of structure-activity relationships in ultra-deep desulfurization and inspires the development of highly-efficient HDS catalysts in the future.
Article
Chemistry, Applied
A. Kokliukhin, M. Nikulshina, A. Mozhaev, C. Lancelot, C. Lamonier, N. Nuns, P. Blanchard, A. Bugaev, P. Nikulshin
Summary: A series of unsupported mono- and bimetallic MonW12-nS2 catalysts were synthesized by alumina elimination from supported MonW12-nS2/Al2O3 samples using acid etching. The unsupported MonW12-nS2 catalysts were found to be more effective in both naphthalene hydrogenation and dibenzothiophene hydrodesulfurization compared to the monometallic catalysts.
Article
Chemistry, Applied
Guosheng Li, Jiaxin Shao, Xinrui Yin, Wenkai Wei, Rong Guo, Xinyue Zhang, Xuandong Liu, Chunguang Zhang, Yuansheng Zhao, Qiaoxia Guo, Chunming Xu, Baojian Shen
Summary: The Fe-based bulk catalysts modified by SO42-species show improved hydrodesulfurization (HDS) performance for dibenzothiophene (DBT). With increased sulfidation degree, more coordinately unsaturated sites (CUSs) are available for DBT adsorption and desulfurization, resulting in enhanced HDS performance. The introduction of the SO42-species significantly increases the HDS rate of DBT over Fe-Ti bulk catalysts.
Article
Materials Science, Multidisciplinary
Xiaohang Yu, Yanzeng Dong, Haining Jia, Xin Li, Zhiheng Wang, Yanyan Liu, Ruiyao Gao, Songdong Yao
Summary: In this study, multilayered, spatially ordered, and highly permeable three-dimensional cross-network porous carbons were prepared from waste superabsorbent polymer as supports for NiMo hydrodesulfurization catalysts. The acidification of the carbon support improved the pore structure, increased the acidic surface functional groups, and enhanced the catalytic performance. The NiMo catalyst supported on acidified SAP showed better HDS performance compared to the commercial NiMo catalyst.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Ming-Yi Chen, Ngoc Thanh Thuy Tran, Ahmed Abubakar Alao, Wen-Dung Hsu
Summary: This study demonstrates the significance of surface Pt atom arrangement for the efficiency of ORR in PEMFCs and reveals the correlation between Pt-Pt average distance and O2 dissociation barrier. Furthermore, the study discovers a robust correlation between the level of the catalyst's d-band center and O2 adsorption energy. High-entropy alloy substrates provide potential for controlling Pt arrangement and O2 dissociation barrier.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Eduardo C. Atayde Jr, Babasaheb M. Matsagar, Yu-Cheng Wang, Kevin C. -W. Wu
Summary: This study presents the first application of an acidic MOF, Sulfated MOF-808, in catalyzing the HAA reactions of furan oligomers for the production of biofuel precursors. The catalyst showed high yield, selectivity, and recyclability, making it versatile for different starting materials.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Maria do Carmo Rangel, Francieli Martins Mayer, Soraia Jesus de Oliveira, Sergio Gustavo Marchetti, Fabricio Luiz Faita, Doris Ruiz, Giovanni Saboia, Mariana Kieling Dagostini, Jonder Morais, Maria do Carmo Martins Alves
Summary: This study developed a new catalyst by investigating the effect of magnesium on the catalytic properties of hematite in ethylbenzene dehydrogenation. The catalyst showed important differences in activity, selectivity, and stability, making it a promising candidate for commercial applications.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yanjun Li, Qian Wang, Hui Tian, Mingyuan Zhu, Yuanyuan Liu
Summary: A novel strategy using microwave-assisted precipitation was proposed to prepare defective CsH3PMo11VO40 catalyst for the oxidation of methacrolein to methacrylic acid. Microwave treatment accelerates crystallization, increases vanadyl species content, and forms defective Keggin structures, thereby enhancing the oxidation capacity of the catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Rajeshwari Athavale, Sailee Gardi, Fatima Choudhary, Dayanand Patil, Nandkishor Chandan, Paresh More
Summary: In this study, a novel acidic ionic liquid catalyst was prepared and used for the synthesis of bis-indolyl methane derivatives. The catalyst exhibited short reaction times, easy purification, and reusability.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Masatomo Hattori, Takato Hattori, Masakuni Ozawa
Summary: Cu-added gamma-Al2O3 catalysts were prepared with varying Cu loadings and the effects of copper oxidation states on catalytic activity were investigated. The results showed that the addition of copper increased the catalyst activity, but excessive copper loading decreased catalytic activity. XRD and TEM analysis indicated the formation of a solid solution of copper oxide species on the surface of gamma-Al2O3. XAS and TPR data demonstrated variations in copper oxidation states among the catalysts.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liwei Fang, Shiyang Niu, Shengsen Wang, Yiqing Lu, Yuanhui Cheng
Summary: In this study, PtNi alloy on nitrogen-doped carbon and SnO2 dual-support was designed to modulate the metal-support interaction, resulting in improved catalytic activity and stability for oxygen reduction reaction. The SnO2/PtNi/NC catalyst exhibited a strongly coupled interface, enhanced electron transfer, and higher half-wave potential compared to PtNi/NC and commercial Pt/C.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Shohei Harada, Duanxing Li, Kenta Iyoki, Masaru Ogura
Summary: This study investigates the catalytic performance of a composite catalyst composed of ZnZrOX and H-zeolite for the hydrogenation of CO2. The deactivation of the composite catalyst is influenced by ion exchange of Zn2+ and/or coke, with their effects differing based on the zeolite structure. Separating the grains of the composite catalyst can prevent deactivation.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Laura Proano, Christopher W. Jones
Summary: In this study, NiGa alloy particles supported on CeO2, ZrO2, and ZrO2-CeO2 solid solutions were prepared and characterized. The nature of the support was found to have a significant influence on the catalyst's activity and selectivity, with the crystalline structure of ZrO2 having the greatest impact. Pure ZrO2 showed the highest methanol selectivity and CO2 conversion at high Zr:Ce ratios. In equimolar and Ce-rich conditions, basic sites and oxygen vacancies were found to be the key parameters affecting methanol production.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Liyan Zhang, Yinze Yang, Leilei Zhou, Fengyu Zhao, Haiyang Cheng
Summary: 1,6-Hexamethylenediamine was successfully synthesized via the reductive amination of 1,6-hexanediol using a Ru/PRL(x)-Al2O3 catalyst. The highly dispersed and anchored Ru species, formed by 1,10-phenanthroline (PRL), played a crucial role in the catalytic reaction. The formation of new acid-base pairs, electron deficient Ru species, and smaller nanoparticles contributed to the improved catalytic performances of the Ru/PRL-Al2O3 catalyst.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Anita Horvath, Miklos Nemeth, Andrea Beck, Gyorgy Safran, Valeria La Parola, Leonarda Francesca Liotta, Gregor Zerjav, Matevz Roskaric, Albin Pintar
Summary: This study investigates the catalytic and structural changes caused by the addition of 0.25 wt% indium in a 3% Ni/CeO2-Al2O3 catalyst prepared by impregnation method. The results show that the addition of indium can decrease the activity of the catalyst, but it improves its stability and reduces coking.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Ankush Kularkar, Vaibhav Vilas Khedekar, Sachin D. Chaudhari, Mudavath Ravi, Sadhana S. Rayalu, Penumaka Nagababu
Summary: Efficiently addressing the challenges of photocatalytic CO2 reduction to CH3OH is crucial. This study developed Zn-BTC MOF and its composites with CaIn2S4, achieving highly efficient and robust photocatalytic CO2 reduction to CH3OH under ambient conditions, using H2O2 as the hydrogen source. Among the composites, ZMCIS4 demonstrated excellent performance with a CH3OH evolution of 49100 μmol/g.cat and a quantum efficiency of approximately 78.41%. The enhanced performance was attributed to the production of nascent hydrogen atoms (H center dot) through the photo-splitting of H2O2 on the ZMCIS surface.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Dan Liu, Yudong Li, Chengyu Wang, Haiyue Yang, Rong Wang, Shujun Li, Xiaohui Yang
Summary: In this study, a self-supporting three-dimensional porous Co3O4 nanobelt array decorated on nickel foam (P-Co3O4 -NBA@NF) electrode with numerous active sites was successfully constructed for the oxidation of 5-Hydroxymethylfurfural (HMF) to 2,5-furan dicarboxylic acid (FDCA). The P-Co3O4 -NBA@NF electrode demonstrated high conversion efficiency, selectivity, and Faraday efficiency, as well as remarkable long-term stability. This research provides a promising electrocatalyst for biomass conversion.
APPLIED CATALYSIS A-GENERAL
(2024)
Article
Chemistry, Physical
Yimin Li, Enggah Kurniawan, Fumiya Sato, Takayoshi Hara, Yasuhiro Yamada, Satoshi Sato
Summary: In this study, several silica-alumina catalysts modified with Ag were examined for the dehydration of 1,3-butanediol to 1,3-butadiene. Among them, an amorphous silica-alumina catalyst (SAL-3) modified with Ag showed the highest improvement in catalytic activity and stability when operated in H2 flow. The generation of reversible acid sites was found to be the reason behind the enhanced activity and stability of this Ag/SAL-3 catalyst. The effects of various parameters on the catalytic activity of Ag/SAL-3, such as reaction temperature, contact time, Ag content, and carrier gas, were investigated.
APPLIED CATALYSIS A-GENERAL
(2024)
