Article
Thermodynamics
Poulami Roy, Hossein Jahromi, Tawsif Rahman, Sushil Adhikari, Farshad Feyzbar-Khalkhali-Nejad, El Barbary Hassan, Tae-Sik Oh
Summary: The performance of cobalt-molybdenum catalysts in the hydrotreating of algae biocrude and carinata oil was investigated. The results showed a synergistic effect in the hydrotreating of the blends, with the yield of the upgraded blend oils higher than the individual parent oils. Sulfided CoMo/DF exhibited superior activity in hydrodeoxygenation reactions, while sulfided CoMo/Al showed high activity in hydrodenitrogenation and hydrodesulfurization reactions.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Multidisciplinary
Lisa Geerts, Hannelore Geerts-Claes, Alexander Skorikov, Julie Vermeersch, Gina Vanbutsele, Vladimir Galvita, Denis Constales, C. Vinod Chandran, Sambhu Radhakrishnan, Jin Won Seo, Eric Breynaert, Sara Bals, Sreeprasanth Pulinthanathu Sree, Johan A. Martens
Summary: Gamma- and delta-alumina spherical core-shell particles were synthesized through a hydrothermal synthesis method, loaded with Pt nanoparticles for bifunctional catalysis. The homogeneous dispersion of platinum nanoparticles on the alumina surface was revealed using electron microscopy and spectroscopy. This unique catalyst model can be used in conjunction with zeolites for studying acid catalytic function without interference from the supported platinum metal.
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
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
Engineering, Environmental
Xiangyang Zhu, Qinling Bi, Liangrong Yang, Huifang Xing, Li Wang, Meng Rong, Shan Ni, Menglei Yuan, Congmei Chen, Huizhou Liu
Summary: Modification of alumina surface with thiol groups can adjust the metal-support interaction, leading to enhanced catalytic performance and stability of the catalyst, as demonstrated in this study where magnetic MoS2 nanoparticles supported on thiol groups grafted alumina showed excellent hydrodesulfurization efficiency and long-term stability.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Energy & Fuels
T. S. Romanova, K. A. Nadeina, I. G. Danilova, V. V. Danilevich, V. P. Pakharukova, A. A. Gabrienko, T. S. Glazneva, E. Yu. Gerasimov, I. P. Prosvirin, Yu. V. Vatutina, M. O. Kazakov, O. V. Klimov, A. S. Noskov
Summary: The effect of Si incorporation at the stage of alumina preparation on the physico-chemical properties and catalytic performance of NiMo/Al2O3 catalysts for FCC feedstock pretreatment was studied. Silicon addition changed the texture characteristics of the support and reduced the acidity of alumina. Incorporation of Si facilitated the segregation of Ni from the NiMoS phase. Addition of Si through kneading improved the hydrodesulfurization activity of the catalysts in VGO hydrotreating.
Article
Engineering, Environmental
Tawfik A. Saleh
Summary: The study showed that adding carbon nanotubes to the alumina support enhances the catalytic activity for the hydrodesulfurization reaction of dibenzothiophene in fuels, with the AlCNTMoNi catalyst demonstrating better performance and stability compared to AlMoNi.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Nian Wang, Yan Wang, Zhao Lu, Runrun Cheng, Longqi Yang, Yongfei Li
Summary: With the growing dominance of high-tech electronic products, the development of high-efficiency electromagnetic wave absorption materials is crucial. In this study, a FeS2/Fe7S8@C@rGO composite with a core-shell heterostructure was successfully prepared using rational component regulation and structural design. The composite demonstrated superior impedance matching, multi-loss mechanisms, and a three-dimensional hierarchical structure, leading to significant attenuation of incident electromagnetic waves and effective absorption of a broad bandwidth of electromagnetic waves.
Article
Chemistry, Applied
Mariya A. Kazakova, Yulia V. Vatutina, Igor P. Prosvirin, Evgeniy Yu Gerasimov, Alexander V. Shuvaev, Oleg V. Klimov, Alexander S. Noskov, Maxim O. Kazakov
Summary: The positive effect of alumina surface graphitization by CVD with ethylene on the activity of CoMo catalysts in hydrodesulfurization has been demonstrated. The simple CVD approach allows selective modification of the surface of commercially available alumina supports with a layer of graphite-like carbon, improving the activity of conventional hydrotreating catalysts. The improved dispersion of supported sulfide component and enhanced promotion of MoS2 by cobalt contribute to the higher hydrodesulfurization activity of CoMoS/C@?-Al2O3 sample.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Energy & Fuels
Asrar Alam, Ghuzanfar Saeed, Kwang Ho Kim, Sooman Lim
Summary: This study reports the fabrication of high-performance cathode and anode electrode materials for flexible asymmetric supercapacitors using metal-organic framework-derived shell@core and MXene-supported shell@core strategies. The as-assembled NiS@Co-Mo-LDHs//Co-Fe-O@MXene flexible all-solid-state asymmetric supercapacitor device exhibits excellent electrochemical performance, showing high energy density and superior capacitance retention.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Hongyu Zhang, Jia Liu, Xiaolin Li, Xiao Duan, Mengchen Yuan, Feng Cao, Kui Sun, Yunbo Zhang, Ying Wang, Zhengbin Gu, Jia Li, Jianguo Liu
Summary: The TiN@C composite support, combining the corrosion resistance of titanium nitride and the conductivity of carbon, showed higher corrosion resistance than carbon support, improving the durability of PEMFCs.
Article
Chemistry, Physical
Xinrong Cao, Weixing Min, Ping Chen, Dongwei Xu, Dongxuan Liu, Ruiqi Wang
Summary: Transition metal sulfides (TMSs) with designed structures exhibit high capacity as anode materials for Lithium-ion batteries. In this study, hierarchical NiS2/CoS2@N,S-C nanospheres with different core-shell structures were fabricated, confirming the role of nickel and cobalt in structure modulation. The NiS2/CoS2@N,S-C(Ni:Co=1:2) with yolk-shell property showed sufficient void space for Li+ and electron transport, along with a protective carbon layer and porous sheet arrays for enhanced structural stability and active sites. The NiS2/CoS2@N,S-C(Ni:Co=1:2) anode exhibited good cycling performance and rate capability. This study provides a reference for designing and preparing novel TMSs-based materials with different morphologies in energy storage field.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Wei Li, Jiayuan Li, Tenghao Ma, Guocheng Liao, Fanfan Gao, Wen Duan, Keling Luo, Chuanyi Wang
Summary: The formation of a uniform mesoporous CdS shell on the surface of Sb2S3 nanorods (NRs) via a surface cationic displacement strategy constructs the core-shell Sb2S3@CdS heterojunction with high BET surface area and excellent near-infrared light harvesting capacity. The Sb-S-Cd bonding interaction and van der Waals force significantly enhance the stability and synergy of Sb2S3/CdS heterointerface throughout the entire surface of Sb2S3 NRs, promoting the Sb2S3-to-CdS electron transfer due to the formation of built-in electric field. Therefore, the optimized Sb2S3@CdS catalyst achieves highly enhanced simulated sunlight-driven Cr(VI) reduction and decomplexation of complexed Cr(III), resulting in effective chromium-containing wastewater treatment.
Article
Chemistry, Physical
Lingmin Wu, Xiujun Wang, Baitao Li
Summary: The porous core-shell Fe3O4@CuSiO3 catalyst was successfully synthesized via a multi-step method, showing high catalytic activity and stability in the styrene epoxidation reaction.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Ludek Kaluza, Karel Soukup, Martin Kostejn, Jindrich Karban, Radostina Palcheva, Marek Laube, Daniela Gulkova
Summary: The effects of different supports on the performance of NiMo sulfide catalysts were investigated. It was found that acidic mesoporous SiO2-Al2O3 exhibited higher activity, while activated carbon support showed outstanding stability.
Article
Chemistry, Physical
G. Marien Bremmer, Lennart van Haandel, Emiel J. M. Hensen, Joost W. M. Frenken, Patricia J. Kooyman
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
Jenoff E. De Vrieze, G. Marien Bremmer, Mostafa Aly, Violeta Navarro, Joris W. Thybaut, Patricia J. Kooyman, Mark Saeys
Article
Geochemistry & Geophysics
Rahul Ram, Megan Becker, Joel Brugger, Barbara Etschmann, Cody Burcher-Jones, Daryl Howard, Patricia J. Kooyman, Jochen Petersen
Article
Chemistry, Physical
Anna P. Petersen, Michael Claeys, Patricia J. Kooyman, Eric van Steen
Article
Chemistry, Physical
Vladimir V. Maximov, Eugenii A. Permyakov, Viktor S. Dorokhov, Anjie Wang, Patricia J. Kooyman, Victor M. Kogan
Article
Chemistry, Physical
Miao Yu, Nikolay Kosinov, Lennart van Haandel, Patricia J. Kooyman, Emiel J. M. Hensen
Article
Chemistry, Physical
Mohamed E. Osman, Vladimir V. Maximov, Viktor S. Dorokhov, Viktor M. Mukhin, Tatiana F. Sheshko, Patricia J. Kooyman, Viktor M. Kogan
Summary: The study found that KCoMoS2 catalyst supported on activated carbon has higher alcohol selectivity and yield at high temperatures, especially producing the highest ethanol yield at the highest conversion studied. Coating alumina with carbon can increase alcohol selectivity, but it leads to a decrease in CO conversion yield of alcohol for activated carbon-supported catalysts.
Article
Chemistry, Physical
Chelsea L. Tucker, Yatheshthrao Ragoo, Silethukuthula Mathe, Lebohang Macheli, Ankur Bordoloi, Tulio C. R. Rocha, Sandeeran Govender, Patricia J. Kooyman, Eric van Steen
Summary: The addition of manganese to cobalt-based Fischer-Tropsch catalysts improves their activity and liquid fuel yield by reducing CO2 and CH4 selectivity. DFT calculations suggest that the promotion of manganese is associated with improved oxygen removal from the catalytically active surface, leading to reduced selectivity towards CO2 and increased liquid fuel yield.
JOURNAL OF CATALYSIS
(2022)
Article
Chemistry, Physical
Motlokoa Khasu, Wijnand Marquart, Patricia J. Kooyman, Charalampos Drivas, Mark A. Isaacs, Alexander J. Mayer, Sandie E. Dann, Simon A. Kondrat, Michael Claeys, Nico Fischer
Summary: The Fischer-Tropsch synthesis, traditionally associated with fossil fuel consumption, has now emerged as a key technology for converting captured CO2 and sustainable hydrogen into energy-dense fuels and chemicals. Iron-based FT catalysts with alkali and transition metal promoters show improved reducibility, activity, and selectivity. The exact speciation and location of these promoters, however, remain poorly understood.
Article
Multidisciplinary Sciences
M. I. Fadlalla, R. Mohamed, D. Susac, T. M. Nyathi, S. Blair, M. Claeys, E. van Steen, P. Kooyman, J. C. Q. Fletcher, N. Fischer
Summary: One of the biggest global challenges today is providing affordable, green, sustainable energy to a growing population. Scientists and engineers are working on developing innovative technologies, such as the Power-to-X (PtX) process, which uses renewable energy, water, and captured CO2 to produce green hydrogen, liquid hydrocarbon fuels, and chemicals. These alternative technologies are important solutions, especially for sectors that are difficult to decarbonize.
SCIENTIFIC AFRICAN
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Lindokuhle P. Magagula, Nosipho Moloto, Siziwe Gqoba, Patricia J. Kooyman, Tshwafo E. Motaung, Ella C. Linganiso
Summary: The study synthesized highly photoluminescent nitrogen-doped functionalized carbon spheres from corncob residue, showing good selectivity and sensitivity towards the detection of Fe3+ with a limit of detection of 70 nM.
Article
Chemistry, Multidisciplinary
Anne France Beker, Hongyu Sun, Mathilde Lemang, J. Tijn van Omme, Ronald G. Spruit, Marien Bremmer, Shibabrata Basak, H. Hugo Perez Garza
Article
Chemistry, Physical
Ziba S. H. S. Rajan, Tobias Binninger, Patricia J. Kooyman, Darija Susac, Rhiyaad Mohamed
CATALYSIS SCIENCE & TECHNOLOGY
(2020)
Article
Chemistry, Multidisciplinary
Eirini Zacharaki, G. Marien Bremmer, Ponniah Vajeeston, Maria Kalyva, Helmer Fjellvag, Patricia J. Kooyman, Anja O. Sjastad
NANOSCALE ADVANCES
(2020)