Article
Chemistry, Physical
Renjie Li, Huiling Zheng, Dong Li, Kun Zhao, Jianmei Li, Yongsheng Chen, Xuehua Yu, Jian Liu, Zhen Zhao
Summary: In this study, a series of 3DOM La1-xKxMnO3 catalysts with high activity for simultaneous removal of soot and NOx from diesel engine emissions were synthesized. The catalyst exhibited excellent catalytic performance due to the strong oxidizability of high valence B-site ions, abundance of active oxygen species and suitable acid sites, good reducibility, and the 3DOM structure. The reaction mechanism of the catalyst was proposed based on characterization results and DFT calculation, contributing to the understanding of the catalyst's high catalytic activity.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Physical
Jia Zeng, Hongmei Xie, Zhao Liu, Xuecheng Liu, Guilin Zhou, Yi Jiang
Summary: This study demonstrates the tuning of oxygen vacancies on alpha-MnO2 for catalytic toluene oxidation, resulting in superior activity and stability. The control of oxygen vacancies weakens the Mn-O bond strength, increases the amount of surface adsorbed active oxygen species, and promotes catalytic activity.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Chunlei Zhang, Di Yu, Chao Peng, Lanyi Wang, Xuehua Yu, Yuechang Wei, Jian Liu, Zhen Zhao
Summary: This paper discusses the importance of catalytic after-treatment exhaust technology in removing diesel soot particles, focusing on the preparation methods and applications of three-dimensional ordered macroporous catalysts. The latest research progress on the catalytic performance and mechanism of these catalysts for soot particle combustion is summarized, and the future development trends are proposed.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Physical
Xueyi Mei, Xingbao Zhu, Yexin Zhang, Zhaoliang Zhang, Zhicheng Zhong, Ying Xin, Jian Zhang
Summary: Researchers have successfully decreased the ignition temperature of soot combustion through an electrification strategy, leading to efficient combustion at low temperatures and improving catalyst efficiency. This method shows promising potential for reducing vehicle emissions at low exhaust temperatures.
Article
Electrochemistry
K. A. Dosaev, S. Ya. Istomin, D. A. Strebkov, G. A. Tsirlina, E. V. Antipov, E. R. Savinova
Summary: Using RDE and CV techniques, electrochemical behavior of different AMn2O4 spinel oxides in an alkaline solution, especially in the ORR, was studied. Surface modifications were observed on the studied spinels (except for MgMn2O4) during potential cycling, contact with alkaline solution, and electrode preparation. Mn3O4 spinel showed the strongest surface modifications due to the presence of easily oxidizable and unstable Mn(II). This work highlights the importance of degradation processes on the electrochemical characteristics of materials in the field of electrocatalysis.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Wenlin Chen, Li Fan, Xiaohuan Jiang, Jinfa Guo, Huanhuan Liu, Mengkui Tian
Summary: Novel CexZr1-xO2 catalysts with different Ce/Zr molar ratios were synthesized using solvothermal, calcination, and sol-gel methods. The catalyst prepared by the calcination method with a Ce/Zr molar ratio of 0.8 exhibited excellent activity and stability at low temperature for soot oxidation. The structure and oxygen adsorption properties of the catalyst were crucial for its activity.
Article
Chemistry, Multidisciplinary
Die Hu, Weiquan Li, Ke Yin, Bichun Huang
Summary: Mn/TiO2 and Ru-Mn/TiO2 catalysts were prepared and their catalytic performance in the oxidation of chlorobenzene was evaluated. The results showed that the Ru-Mn/TiO2 catalyst exhibited better activity compared to the Mn/TiO2 catalyst. The interaction between Ru and Mn species at the interfaces of Ru/Mn promoted the formation of oxygen vacancies and surface reactive oxygen species, enhancing the catalytic activity.
NEW JOURNAL OF CHEMISTRY
(2022)
Review
Engineering, Environmental
Hailong Li, Jinjin Huang, Jianping Yang, Zequn Yang, Wenqi Qu, Zhengyong Xu, Kaimin Shih
Summary: This paper introduces an effective method for removing Hg0 from flue gas in coal-fired power plants using SCR catalysts and wet flue gas desulfurization technology, and focuses on the behavior of Hg2+ reduction under SCR conditions. Measures to suppress Hg2+ reduction are proposed, providing guidance for designing efficient Hg0 oxidation SCR catalysts.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Ehsan Akbari, Seyed Mehdi Alavi, Mehran Rezaei, Afsanehsadat Larimi
Summary: Different morphologies of MnOx nanocrystalline catalysts prepared using hydrothermal and solution methods showed varying performance in catalytic combustion of methane, with the wire-like MnO2 catalyst exhibiting excellent efficiency. Various synthesis factors significantly influenced the structure and activity of the catalysts, with a specific sample showing the highest efficiency under certain conditions. The stability of the optimal MnO2 sample decreased slightly in the presence of CO2 and water vapor, but displayed high stability under dry feed conditions at higher temperatures for an extended period.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Yi Qi, Xin Xiao, Yuqing Mei, Lingyingzi Xiong, Liheng Chen, Xuliang Lin, Zhan Lin, Shirong Sun, Bing Han, Dongjie Yang, Yanlin Qin, Xueqing Qiu
Summary: This paper presents a new strategy to tune the active sites of catalysts for the selective cleavage of lignin to produce aromatic monomers. The authors achieved this by adjusting the non-stoichiometric ratio of nickel and cobalt. The optimized Ni0.2Co2.8O4 catalysts showed outstanding catalytic conversion and selectivity for lignin cleavage.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Energy & Fuels
Rohini Khobragade, Govindachetty Saravanan, Hisahiro Einaga, Hideo Nagashima, Pravesh Shukla, Tarun Gupta, Avinash Kumar Agarwal, Nitin Labhasetwar
Summary: Research has shown that non-precious metal manganese-substituted strontium ferrite catalysts exhibit improved diesel particulate matter oxidation performance and possess potential for reducing diesel PM emissions.
Article
Thermodynamics
Yasin Khani, Behzad Valizadeh, Soheil Valizadeh, Hoyeon Jang, Hyeonji Yim, Wei-Hsin Chen, Young -Kwon Park
Summary: This study developed a catalytic gasification technology using spinel-type oxide-supported Ni catalysts to treat furniture waste sawdust and generate H2-rich gas. The use of catalysts greatly enhanced gas yield and selectivities, while reducing the generation of CO2, CH4, and C2-C4. The potential of this technology lies in its economic and eco-friendly approach to producing H2.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Physical
Jesus Gonzalez-Cobos, Brice Mylonoyannis, Guangtao Chai, Weidong Zhang, Chengcheng Tian, Akim Kaddouri, Sonia Gil
Summary: Un-supported spinel-type cobalt chromite catalysts were synthesized by propionic acid-mediated sol-gel method and evaluated for toluene oxidation. The Co and Cr content and the preparation conditions were found to significantly affect the physico-chemical, surface and catalytic properties. Co-rich CoCr2O4 catalyst showed the highest activity due to the formation of a single CoCr2O4 spinel phase, favorable surface composition, and higher low-temperature reducibility. Surface Cr6+ ions and adsorbed oxygens were found to play an important role in toluene oxidation reaction.
APPLIED CATALYSIS A-GENERAL
(2023)
Article
Engineering, Environmental
Liyun Song, Shilin Deng, Chunyi Bian, Cui Liu, Zongcheng Zhan, Shuangye Li, Jian Li, Xing Fan, Hong He
Summary: Microwave-assisted selective catalytic reduction of nitrogen oxides (NOx) was investigated over Ni-based metal oxides. The NiMn2O4 and NiCo2O4 catalysts synthesized by the co-precipitation method showed high catalytic efficiency for low-temperature NH3-SCR in a microwave field. The results revealed that microwave radiation reduced the reaction temperature required for NH3-SCR, and the NiMn2O4 catalyst exhibited excellent performance under both microwave and conventional heating conditions due to its specific surface area, redox property, NO adsorption-desorption capability, and acidic sites.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Zepan Wang, Peiyuan Wu, Xubing Zou, Sheng Wang, Lei Du, Ting Ouyang, Zhao-Qing Liu
Summary: By partially replacing Co3+ with the more electro-negative Mn3+ ion at the octahedral site, a ternary Zn-Mn-Co spinel oxide is formed, leading to a significant increase in electrocatalytic oxygen reduction/evolution activity. Physical characterization and theoretical calculations show that bond competition plays a crucial role in regulating the cobalt valence state and the electrocatalytic activity. The partial replacement of Co3+ by Mn3+ effectively modulates the adjacent Co-O bond and induces the Jahn-Teller effect, resulting in a change in crystal structure and optimization of the binding strength with reaction intermediates. The Mn-substituted ZnMn1.4Co0.6O4/NCNTs exhibit higher electrocatalytic activity than ZnCo2O4/NCNTs and ZnMn2O4/NCNTs, indicating that the covalency of the Co-O bond determines the oxygen reduction reaction (ORR) activity of spinel ZnCo2O4. This study introduces the competition between adjacent Co-O and Mn-O bonds through the B-Oh-O-B-Oh edge-sharing geometry, demonstrating that ion substitution at octahedral sites with less electronegative cations can effectively enhance the electrocatalytic performance of cobalt-based spinel oxides.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Simelys Hernandez, Sitaramanjaneya Mouli Thalluri, Adriano Sacco, Samir Bensaid, Guido Saracco, Nunzio Russo
APPLIED CATALYSIS A-GENERAL
(2015)
Article
Chemistry, Physical
Marco Piumetti, Murid Hussain, Debora Fino, Nunzio Russo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Marco Piumetti, Samir Bensaid, Nunzio Russo, Debora Fino
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Chemistry, Physical
Marco Piumetti, Debora Fino, Nunzio Russo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2015)
Article
Engineering, Environmental
Bernardo Ruggeri, Federico Battista, Milena Bernardi, Debora Fino, Giuseppe Mancini
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Engineering, Environmental
Murid Hussain, Parveen Akhter, Nunzio Russo, Guido Saracco
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Chemistry, Multidisciplinary
D. Hidalgo, S. Bocchini, M. Fontana, G. Saracco, S. Hernandez
Review
Chemistry, Physical
Debora Fino, Samir Bensaid, Marco Piumetti, Nunzio Russo
APPLIED CATALYSIS A-GENERAL
(2016)
Article
Chemistry, Physical
Sitaramanjaneya Mouli Thalluri, Simelys Hernandez, Samir Bensaid, Guido Saracco, Nunzio Russo
APPLIED CATALYSIS B-ENVIRONMENTAL
(2016)
Article
Engineering, Electrical & Electronic
D. Valerini, S. Hernandez, F. Di Benedetto, N. Russo, G. Saracco, A. Rizzo
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2016)
Article
Green & Sustainable Science & Technology
Giulia Grisolia, Debora Fino, Umberto Lucia
Summary: This study evaluates the potential of producing biomethane from rice straw through anaerobic digestion and introduces the concept of "rice straw barrel" as a metric approach to assigning economic value to this waste. The improvement in sustainability by using rice straw barrels is analyzed based on a new indicator called the Thermodynamic Human Development Index (THDI).
Article
Engineering, Chemical
Ri Zhang, Shasha Zhang, Mengyan Ding
Summary: A thin liquid film method is proposed to evaluate sand erosion in annular flow. This method considers the direct interaction between the liquid film and gas core, as well as the entrainment and deposition of droplets. The erosion rate is calculated by considering the effects of liquid entrainment and particle velocity decay. The method is fully verified by comparing with experimental data.
Article
Engineering, Chemical
Yu Suo, Xianheng Su, Wenyuan He, Xiaofei Fu, Zhejun Pan
Summary: This research investigates the mechanical properties of sandstone-shale composite through orthogonal experimental method and discrete element simulation. The results show that different lithologies and thickness ratios can affect the strength and fracture mode of the composite rock samples.
Article
Engineering, Chemical
Maurizio Troiano, Andrea El Hassanin, Roberto Solimene, Alessia Teresa Silvestri, Fabrizio Scala, Antonino Squillace, Piero Salatino
Summary: This study investigates the potential of Fluidized Bed Finishing (FBF) for square flat AlSi10Mg specimens manufactured via Laser-Powder Bed Fusion (L-PBF) additive manufacturing technology. The results show that good finishing can be achieved using rotation-assisted tests, with a maximum reduction of surface roughness by 67%. Steel particles are found to be the most effective bed material.
Review
Engineering, Chemical
Ningbo Song, Wanzhong Yin, Jin Yao
Summary: Seawater's dissolved salts and minerals have various effects on the flotation process, including influencing the characteristics and behavior of flotation factors, as well as affecting the surface of sulfide minerals. In most cases, seawater has adverse effects on the flotation of sulfide minerals, but these effects can be mitigated by adjusting the reagents.
Article
Engineering, Chemical
Kaiqiao Wu, Shuxian Jiang, Victor Francia, Marc-Olivier Coppens
Summary: In rectangular and cylindrical annular fluidized beds, pulsating gas flow can create regular bubble patterns, overcoming challenges seen in conventional units. This study provides new opportunities for modularization of fluidized bed operations.
Article
Engineering, Chemical
Shuo Li, Huili Zhang, Jan Baeyens, Miao Yang, Zehao Li, Yimin Deng
Summary: The paper assesses the behavior of cohesive Geldart C-type particles when fluidized by air with the aid of vibration. It determines that mechanical vibration is a simple and effective method to improve the fluidity of cohesive particles during fluidization.
Article
Engineering, Chemical
Zhenfei Feng, Qingyuan Zhang, Shanpan Liang, Zhenzhou Li, Fangwen Guo, Jinxin Zhang, Ding Yuan
Summary: A new micro/mini-channel heat sink (MCHS) with a combined structure of longitudinal and transverse vortex generators is designed, using Al2O3 nanofluid as the working medium. The study explores the effects of transverse vortex generator shape and longitudinal vortex generator angle on the hydraulic and thermal characteristics, comprehensive performance, entropy generation, and exergy efficiency. The results show that the triangular transverse vortex generator improves the comprehensive performance and exergy efficiency. Combined with the longitudinal vortex generator, the MCHS achieves the best comprehensive performance, entropy generation, and exergy efficiency when the Reynolds number is 742.
Article
Engineering, Chemical
Kostas Giannis, Christoph Thon, Guoqing Yang, Arno Kwade, Carsten Schilde
Summary: This study presents a 3D convolutional neural network (3D-CNN) methodology for generating realistic 3D models of particles. The method trains on 2D projections of particle images to predict their 3D shapes, and evaluates the accuracy of the predictions using Fourier shape descriptors (FSDs). This methodology has wide applications in particle shape analysis.
Article
Engineering, Chemical
Zheng-qing Zhou, Lu-jia Chai, Yu-long Zhang, Ya-bin Wang, Ze-chen Du, Tian-yi Wang, Yu-zhe Liu
Summary: The dynamic oxidation and shell-breaking processes of aluminum nanoparticles (ANPs) during heating were studied using in situ transmission electron microscopy. The results revealed that the changes in shell thickness can be divided into three stages, and the active aluminum content of ANP decreased before shell-breaking.
Article
Engineering, Chemical
Fulei Chen, Huaqing Ma, Zihan Liu, Lianyong Zhou, Yongzhi Zhao
Summary: A particle breakage model based on the particle replacement scheme, using the polyhedral model to describe particles, is proposed in this work to accurately describe the breakage of a large number of particles. Additionally, a fast-cutting algorithm is proposed to reproduce the size distribution of progeny particles determined by the breakage model. The validation and simulation results show satisfactory accuracy, efficiency, and stability of the algorithm.
Review
Engineering, Chemical
Matteo Errigo, Christopher Windows-Yule, Massimiliano Materazzi, Dominik Werner, Paola Lettieri
Summary: Gas-solid fluidized-bed systems have advantages in terms of chemical reaction efficiency and temperature control, making them widely used in industrial applications. However, the design, scale-up, and optimization of these complex units are limited by the lack of deep physical understanding. Non-invasive and non-intrusive diagnostic techniques provide a way for researchers to study these systems without affecting the flow field or directly contacting the medium under study.
Article
Engineering, Chemical
Saeed Fateh, Mohammad Behshad Shafii, Mohammad Najafi, Cyrus Aghanajafi
Summary: Applying a magnetic field to ferrofluids alters their flow characteristics and enhances heat transfer. Through visualization and quantitative investigation, it is found that the magnetic field influences the flow patterns and velocity profiles, improving fluid mixing and vorticity magnitude.
Article
Engineering, Chemical
Lei Gao, Bingbing Wei, Xiaochuan Hu, Zaifeng Yao, Yiwen Fang, Xuejian Gao
Summary: In this study, a numerical model of sand triaxial test was established using discrete element software PFC3D, and an indoor triaxial test was conducted to calibrate the numerical model. The influence of microscopic parameters on the macroscopic mechanical response of sand was analyzed. The results showed that the friction coefficient had the greatest impact on the peak strength and residual strength of the sand's stress-strain curve, and it was positively correlated. The normal tangential stiffness ratio was negatively correlated, while the porosity and boundary flexibility stiffness had minimal influence on it.
Article
Engineering, Chemical
Xuan Liu, Jie Gong, Kai Jiang, Xiaojuan Lai, Yu Tian, Kang Zhang
Summary: This study aimed to improve the performance of lignite coal water slurries (CWSs) by synthesizing a series of three-arm amphiphilic block copolymers. By controlling the relative molecular weight, hydrophilic/hydrophobic ratio, and ionic group content, the apparent viscosity of CWSs was significantly reduced and the static stability was improved. Thermogravimetric testing and XPS analysis were conducted to reveal the mechanism behind the improved performance.
Article
Engineering, Chemical
Lanka Dinushke Weerasiri, Daniel Fabijanic, Subrat Das
Summary: Fluidization at low pressure offers significant benefits for the fine chemical industry. This study investigates the behavior of bubbles and bed expansion under low pressure conditions. It is found that lower pressure leads to larger bubbles, increased bubble quantity, and higher aspect ratio. The predictability is affected by the inhomogeneous fluidization, but low pressure fluidization can generate similar bubble sizes with lower fluidizing mass compared to atmospheric pressure.
