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, 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
Optics
Riffat Sagheer, Sabah Tul Khadija, Zohra Nazir Kayani, Saira Riaz
Summary: In this research, pristine and La-doped ZnO nanoparticles were synthesized using the sol-gel technique. Varying the dopant concentration allowed for the manipulation of the structural, optical, and magnetic properties of the nanoparticles. La-doped ZnO nanoparticles exhibited improved optical and magnetic behaviors, making them promising for various applications such as gas sensors and optoelectronic devices.
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
Jingrong Wang, Zhihua Gao, Pengquan Yan, Yaxing Shen, Rui Yang, Zhijun Zuo, Wei Huang
Summary: CuO prepared by hydrothermal method exhibits good catalytic activity in CO hydrogenation reaction. The size of CuO crystallite has a significant impact on the catalytic structure and performance. The CuZnAl catalyst shows excellent performance at a hydrothermal temperature of 130 degrees C, achieving high selectivity of total alcohol and being positively correlated with the ratio of Cu+/Cu-0 and total number of alkalis.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Pierre-Igor Dassie, Ryma Haddad, Maud Lenez, Alexandra Chaumonnot, Malika Boualleg, Patrick Legriel, Ales Styskalik, Bernard Haye, Mohamed Selmane, Damien P. Debecker, Clement Sanchez, Corinne Chaneac, Cedric Boissiere
Summary: Innovation in materials manufacturing processes is a challenge to reduce the environmental impact of the chemical industry in line with sustainable development objectives. One of the ways to reach this goal is to revisit the main synthesis processes and to rethink their use.
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
Energy & Fuels
Di Hu, Hui-Ping Li, Jin-Lin Mei, Cheng-Kun Xiao, En-Hua Wang, Xi-Yue Chen, Wen-Xin Zhang, Ai-Jun Duan
Summary: This paper synthesized ordered mesoporous alumina (OMA) support with high surface area and large pore volume using a homogeneous precipitation method. The influence of EDTA on the physical and chemical properties of the modified catalysts was investigated. The results showed that EDTA could adjust the metal-support interaction and improve the acidity of the catalyst. The EDTA-modified NiMoE(1.0)/OMA catalyst displayed the highest DBT hydrodesulfurization conversion.
Article
Chemistry, Applied
Hao Zhang, Guang-Ren Qian, Hong Liu
Summary: Alumina composites containing ZSM-5 were developed, and two series of catalysts were prepared for HDS, showing that NiMoS/xMZA catalysts exhibit higher activity and different selectivity compared to NiMoS/xZA catalysts. This suggests that micropores and mesopores in the composites have an impact on HDS activity and selectivity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Abhishek Nigam, Sheetal Saini, Ambak Kumar Rai, S. J. Pawar
Summary: In this study, spindle-shaped ZnO submicron particles were synthesized and characterized by various analytical methods. The research investigated the cytotoxic and anti-microbial activities of these particles, revealing their biocompatible nature, cytotoxic properties against cancer cell lines, and significant anti-microbial activity against bacteria. The findings suggest that these submicron particles could be safe candidates for biomedical applications.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Laura A. Voelker, Jordan Meyet, Zachariah J. Berkson, Lukas Rochlitz, Jeroen A. van Bokhoven, Christophe Coperet
Summary: This study deepens our understanding of reactive surface sites in high-surface-area γ-Al2O3 materials by developing gamma-Al2O3 nanocrystals with a high relative fraction of edge sites and using state-of-the-art solid-state NMR techniques. The study identifies the presence of two four-coordinate Al-sites with different quadrupolar coupling constants in this material.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
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
Farhad Keivanimehr, Sajjad Habibzadeh, Maryam Mokhtarian
Summary: Manipulating the electronic properties of HDS catalysts by titania can enhance surface acidity and reductive behavior. CoMo/Al2O3-TiO2 with 10 wt% titania loading outperforms the catalyst without titania, removing over 96% of sulfur-containing molecules in Pygas and increasing the yield of aromatic compounds, thus improving the quality and value of the product.
Article
Materials Science, Multidisciplinary
Abhishek Nigam, S. J. Pawar
Summary: A hydrothermal method was utilized in this study to optimize five different morphologies of ZnO for biomedical applications. X-ray diffraction patterns confirmed the hexagonal wurtzite structure of ZnO, with varying crystallite sizes observed among different samples. Field emission scanning electron microscopy revealed distinct morphologies of the ZnO powders.
MATERIALS TECHNOLOGY
(2022)
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
Chemistry, Applied
Lulu Wan, Gan Ye, Yuying Chang, Zhaohan Yang, Guangming Shi, Qiuli Zhang, Jin Wang
Summary: This study developed an efficient approach to upgrade the oxidative desulfurization (ODS) performance of Zr-MOFs with proton stimulation. Experimental results showed that the introduction of protons can significantly improve the ODS efficiency. This work provides a facile and efficient strategy for enhancing the ODS performance of pristine MOFs.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Qiqi Lu, Xiu-Zhi Wei, Qi Zhang, Xinghua Zhang, Lungang Chen, Jianguo Liu, Yubao Chen, Longlong Ma
Summary: The application of Pd-M bimetallic clusters in the selective hydrogenation reaction was investigated, and the Pd0.6Ni@S-1 catalyst was found to exhibit high selectivity in the conversion of phenylacetylene to styrene. The confinement effect of zeolite inhibited over-hydrogenation and improved the stability of the catalysts. Furthermore, the solvent properties also influenced the product distribution.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Review
Chemistry, Applied
Bo Li, Lumin Hong, Changdi Jing, Xianyang Yue, Huabo Huang, Qianqian Jiang, Jianguo Tang
Summary: MOF materials with adjustable pore structure and polymetallic sites have been explored as electrocatalysts for OER. Bimetallic materials show higher electrocatalytic activity than monometallic materials, while carbon-coated and doped MOF catalysts exhibit stable and good OER activity. The synergistic interaction between polymetallic active sites effectively improves the intrinsic activity of MOF on OER.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shichun Gu, Ruyi Wang, Junxiong Zhang, Hairong Dong, Liping Deng, Xue Wang, Yapeng He
Summary: In this study, monodispersed hollow mesoporous organosilica nanospheres with controlled core cavity and mesoporous shell were successfully synthesized. These hollow nanospheres showed a high adsorption capacity for Pb2+ in water solution and exhibited acceptable recycling and stability.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Lucie Havelkova, Bogdana Bashta, Michaela Vankova, Jiri Zednik, Jiri Brus, Jan Svoboda, Alice Vagenknechtova, Jan Sedlacek
Summary: An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with a permanent micro/mesoporous texture and a BET area of up to 1062 m2/g is reported. The homopolymerization is highly compatible with the heteroatom groups of the monomers and allows the preparation of well-defined porous networks with a wide spectrum of univalent groups.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Shirui Pang, Yuxin Liu, Zhe Zhang, Yuxin Li, Chunguang Li, Zhan Shi, Shouhua Feng
Summary: This study focuses on using a functional separator to suppress the shuttle effect of soluble lithium polysulfides in Li-S batteries. It is found that the functionalized sulfonic acid group not only accelerates the conduction of lithium ions, but also repels polysulfide anions through electrostatic interactions. The performance of the batteries is significantly improved with the use of this functionalized separator.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Pingping Li, Lei Han, Donghun Kim, Kemal Celebi
Summary: This study presents a fast synthetic strategy for the preparation of high-quality platelike MFI crystals using a thin-wall tubular reactor. The strategy is efficient, time-saving, and can be optimized, making it applicable to the preparation and optimization of other important materials.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Haitao Yin, Wei Wang, Yuxin Li, Hu Wen, Shuang Chen, Nanzhe Jiang
Summary: This study presents a template-free and solid-state-like crystallisation method for the synthesis of ZSM-5 zeolite, which can be scaled-up in production. Mechanical mixing of starting material components improves the dispersion of materials, leading to ZSM-5 zeolite with high crystallinity and size uniformity.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Congli Li, Jiang Wang, Zhenfei Wang, Jinxiang Dong, Qi Shi
Summary: This study investigates the evolution and autoreduction behavior of Cu species in CuCl/NaY adsorbent during vacuum thermal activation. It is found that Cu species migrate from supercages to the nearby plane of the six-membered ring connecting the supercage and sod cage during vacuum activation. At 150 degrees C, vacuum autoreduction occurs, resulting in the formation of Cu+Cl- species. The results provide reference for the preparation of pi-complex adsorbents.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Irena Khatrin, Iman Abdullah, Alan J. Mccue, Yuni K. Krisnandi
Summary: Hierarchical porous system with two types of mesopores provides a solution to the diffusion limitation in conventional zeolites. Cobalt oxide impregnated hierarchical ZSM-5 zeolite samples with intra- and inter-crystalline mesopores were synthesized using two different strategies. The physicochemical properties of the modified catalysts were analyzed, revealing distinct features given by the two mesoporous configurations. Catalytic activity analysis showed that Co-oxide/ZSM-5 with inter-crystalline mesopores exhibited higher activity in methane partial oxidation reaction compared to Co-oxide/ZSM-5 with intra-crystalline mesopores.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Nataliia Reinders, Martin Durovic, Pavla Honcova, Zaneta Dohnalova, Jana Luxova, Stanislav Slang, Jhonatan Rodriguez-Pereira, Petra S. Sulcova
Summary: This study presents a new method for preparing a microporous Ni2P/C catalyst with high catalytic activity. The redox reaction and carbon matrix formation during high-temperature treatment contribute to the stability and activity of the catalyst. Experimental and analytical results suggest that the microporous structure of the composite plays a crucial role in its catalytic performance. These findings are important for practical applications of efficient hydrogen production by water electrolysis.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Ana Raquel Bertao, Viktoriya Ivasiv, Cristina Almeida-Aguiar, Patricia R. Correia, Antonio M. Fonseca, Manuel Banobre-Lopez, Fatima Baltazar, Isabel C. Neves
Summary: This study developed a zeolite-based delivery system (ZDS) using silver and 5-Fluorouracil as antimicrobial and antineoplastic agents. The ZDS was characterized and its antimicrobial properties were investigated, showing better antibacterial effectiveness for the ZDS containing both silver and 5-FU.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Naonobu Katada, Nobuki Ozawa, Etsushi Tsuji, Keigo Kanehara, Akiho Otsuka, Taiga Sakamoto, Kirari Umezawa, Hitoshi Matsubara, Satoshi Suganuma, Momoji Kubo
Summary: First principles calculations were used to investigate the pathway for methylation of benzene with methane catalyzed by MFI type zeolite-supported Co species. The strong adsorption of benzene on Co is found to lower the activation energy for methane dissociation and promote the formation of toluene precursor. The activation energy of methane dissociation is also affected by the Al-Al distance.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Yuan Liu, An T. Ta, Kyoung Chul Park, Shenyang Hu, Natalia B. Shustova, Simon R. Phillpot
Summary: We use density functional theory to investigate the interactions of cerium, americium, and curium cations with crown ethers. Our results demonstrate that crown ethers can capture cerium, americium, and curium ions, and modifying the crown ether structure by substituting nitrogen atoms for oxygen atoms significantly increases their binding energies with radionuclides.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)
Article
Chemistry, Applied
Zhengwu Peng, Shixing Wang, Yihui Wu, Xiang Liu, Hongliang Liu, Dekun Zhang, Likang Fu
Summary: An efficient adsorbent for recovery of germanium was prepared and characterized in this study. The adsorption behavior of Ge(IV) on the adsorbent was analyzed, and the results showed that it follows pseudo-secondary kinetic model and Langmuir isotherm model. The adsorbent exhibited good anionic anti-interference ability and can still maintain high adsorption efficiency after repeated adsorption.
MICROPOROUS AND MESOPOROUS MATERIALS
(2024)