Article
Green & Sustainable Science & Technology
Huafang Yu, Xin Lu, Takahiro Miki, Yasushi Sasaki, Tetsuya Nagasaka
Summary: Experiment conducted on carbothermic reduction of (C2S-40 mol% C3P)(ss) at 1573 K showed a zero-order reaction, while no reduction occurred at temperatures below 1473 K. Reduction mainly proceeded by the decomposition of the C2S-C3P solid solution into CaO and C2S with the removal of phosphorus.
JOURNAL OF SUSTAINABLE METALLURGY
(2021)
Article
Chemistry, Physical
Ya-Jie Liu, He-Fei Kang, Liang-Liang Zhang, Cai-Long Xue, Li-Jing Yuan, Xiao-Ning Hou, Lei Zhang, Zhi-Xian Gao
Summary: The non-isothermal reduction kinetics of Cu-Al spinel solid solution by hydrogen was investigated using H2 temperature-programmed reduction at different heating rates. The study found that the reduction process of the spinel Cu2+ species consisted of four stages, with different reduction mechanisms and activation energies.
CATALYSIS COMMUNICATIONS
(2023)
Article
Engineering, Chemical
Xiaodong Lv, Dan Chen, Yuntao Xin, Wei Lv, Jie Dang, Xuewei Lv
Summary: The addition of Na2CO3 was found to lower the initial temperature of the reaction, promote reduction, and optimize the reaction kinetics. With an increase in Na2CO3 content, the reduction process of ilmenite gradually transitions from being controlled by chemical reaction to diffusion control.
Article
Metallurgy & Metallurgical Engineering
Sai He, Lu Lin, Ya-qin Liu, Zhong-xiao Hou, Yan Lv, Wei Wu
Summary: The reduction and recovery of P2O5 in dephosphorization slag were investigated, aiming to establish a new recycling process. The dephosphorization slag, obtained from the dephosphorization furnace in the duplex converter process, has a high content of P2O5 (up to 9 wt.%), making it a potential phosphorus resource. By conducting experiments with carbon powder reduction in a resistance furnace, the temperature and Fe2O3 content in the slag were found to significantly influence the reduction of P2O5. The study revealed that carbothermic reduction is an environmentally and economically beneficial method for phosphorus recovery from dephosphorization slag.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Jose Belisario, Santanu Mondal, Iman Khakpour, Alexander Franco Hernandez, Andriy Durygin, Zhe Cheng
Summary: (Hf1-xZrx)B-2 solid solution powders were synthesized by two methods, characterized, sintered into ceramics, and their properties were studied. The influence of different parameters on product characteristics was examined, and implications of the study were discussed for future research.directions.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Metallurgy & Metallurgical Engineering
M. Beighi, M. Pourabdoli, Sh. Raygan, H. Abdizadeh
Summary: This study investigated the key parameters (milling time, temperature, time, and reduction atmosphere) for preparing tungsten carbide through carbothermic reduction of WO3. SEM, XRD, TG/DTA, and hardness tests were conducted for characterization. TG/DTA analysis showed that the endothermic reactions related to the reduction of 10 h milled WO3 and its conversion to tungsten and tungsten sub-oxides occur between 700 and 826°C. Tungsten carbide formation occurs in the temperature range of 1000-1287°C. The amount and uniformity of tungsten carbide increases with higher reduction temperature and longer process time. Increasing the milling time up to 30 h improves tungsten carbide formation leading to enhanced structural homogeneity and hardness.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shagun Kainth, Raveena Choudhary, Sanjay Upadhyay, Pankaj Bajaj, Piyush Sharma, L. K. Brar, O. P. Pandey
Summary: The solid-state synthesis kinetics of barium titanate were investigated using thermogravimetry analysis and derivative thermogravimetry. The formation of pure tetragonal BaTiO3 and intermediate compounds were confirmed. Thermodynamic parameters were calculated for all possible reactions, and the thermal kinetics were analyzed using deconvolution and iso-conversional KAS kinetic models. The reaction mechanisms and pre-exponential were identified using the integral master plot method.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Yao Li, Yu Wang, Jian Cui, Guo-Hua Zhang
Summary: This article introduces a novel method for synthesizing high-entropy carbides (HECs) powders using raw materials of corresponding oxides and carbon black. Pure HECs powders can be obtained through ball-milling, carbothermic reduction, calcium posttreatment, and acid leaching treatment. The effect of different elements on the formation of solid solution is investigated.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Jianliang Zhang, Yang Li, Zhengjian Liu, Tengfei Wang, Yaozu Wang, Kejiang Li, Guilin Wang, Tao Xu, Yong Zhang
Summary: Isothermal thermogravimetric analysis was used to study the reduction process of solid/liquid wustite by hydrogen. Results show that wustite in both states can be reduced entirely at all temperatures. The thermal and kinetic conditions for the hydrogen reduction of molten phases are better than those when the reactants and products are in the solid state, with a higher reaction rate. The hydrogen reduction of different wustite phases fits the Mampel Power model well, and this model is independent of the phase state.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Xianfen Li, Run Huang, Qinghui Wu, Shufang Xie, Junqi Li
Summary: The vacuum carbothermal reduction behavior of low-grade phosphate ore was studied using coke powder as a reducing agent. The results showed that temperature had a significant influence on reduction degree, with high reaction rates above 1250 degrees C. The control of the reduction process was found to be under the shrinking core model and diffusion, with activation energies of 124.67 kJ/mol and 265.9 kJ/mol.
JOURNAL OF SUSTAINABLE METALLURGY
(2021)
Article
Chemistry, Physical
Anna N. Matveyeva, Shamil O. Omarov, Marianna A. Gavrilova, Dmitry A. Sladkovskiy, Dmitry Yu Murzin
Summary: This study focuses on the synthesis of CeFeO3 by solution combustion synthesis and its physicochemical and catalytic properties. The results show that glycine is the best fuel for obtaining CeFeO3 with high yield, and the addition of NH4NO3 promotes the amount of CeFeO3 and selectivity.
Article
Materials Science, Ceramics
Jialiang An, Mingyong Wang, Jintao Zhang, Yongzheng Jia, Baoyan Feng, Lei Dai, Shuqiang Jiao
Summary: In this study, VCxO1-x solid solution was successfully synthesized through carbothermal reduction method, and the effects of reaction conditions on the synthesis were investigated. The results showed that VCxO1-x is a continuous solid solution with better thermal stability and oxidation resistance compared to VC. Additionally, VCxO1-x solid solution exhibits high conductivity. This work is significant for the controllable synthesis of VCxO1-x solid solution and its potential applications in energy storage, catalysis, and metallic vanadium preparation.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Binbin Lyu, Guang Wang, Fan Yang, Haibin Zuo, Qingguo Xue, Jingsong Wang
Summary: This study investigated the kinetics of direct reduction of iron ore with H-2. It was found that higher temperatures led to shorter reduction times and the formation of a dense matrix structure for metallic iron particles in isothermal experiments. The reduction process involved a combination of gaseous diffusion and interfacial chemical reaction mechanisms in the initial stages, and a combination of interfacial chemical reaction and solid diffusion mechanisms in the later stages. In non-isothermal experiments, the heating rate significantly affected the reaction rate, with the reduction proceeding through three stages: mixing control model, two-dimensional diffusion, and three-dimensional diffusion.
Article
Food Science & Technology
Tatiane Milkievicz, Vinicius Badia, Vanessa Barreira Souza, Daniel Angelo Longhi, Alessandro Cazonatto Galvao, Weber da Silva Robazza
Summary: The study found that the double Weibull model was the most accurate for fitting Salmonella inactivation in chicken meat, indicating that bacterial population can be divided into two subpopulations based on thermal sensitivity influenced by fat content in chicken meat. Results suggest that 90% of Salmonella population in chicken parts can be inactivated at different heating times, and model performance for non-isothermal temperature profiles showed >80% predictions falling within acceptable prediction zone with smooth temperature changes.
INTERNATIONAL JOURNAL OF FOOD MICROBIOLOGY
(2021)
Article
Mechanics
Prathamesh G. Bange, Gaurav Upadhyay, Nagesh D. Patil, Rajneesh Bhardwaj
Summary: This study investigates the isothermal and non-isothermal spreading of viscous silicone oil droplets on a glass surface, considering the effects of viscosity, impact velocity, and substrate temperature. The research utilizes experimental observations and numerical modeling to analyze the dynamics of spreading under different conditions, highlighting the influence of temperature, viscosity, and impact velocity on the spreading behavior. The study provides insights into the mechanisms governing the early and late spreading regimes, as well as the impact of substrate temperature on spreading magnitude and recoiling behavior.
Article
Chemistry, Analytical
Sikai Zhao, Yanbai Shen, Pengfei Zhou, Fulai Hao, Xiangyu Xu, Shuling Gao, Dezhou Wei, Yuxin Ao, Yansong Shen
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Materials Science, Multidisciplinary
Xiaobing Yu, Yansong Shen
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2020)
Article
Materials Science, Multidisciplinary
Xiaobing Yu, Yansong Shen
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2020)
Article
Engineering, Environmental
Shuang Song, Liangwan Rong, Kejun Dong, Xuefei Liu, Pierre Le Clech, Yansong Shen
Article
Materials Science, Multidisciplinary
Yiran Liu, Zhongjie Hu, Yansong Shen
Summary: This study improved a CFD model to investigate the co-injection of hydrogen/coal in ironmaking blast furnaces, showing that increasing hydrogen injection affects coal combustion characteristics. The model provides a tool for designing and optimizing the co-injection of hydrogen and coal.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Engineering, Environmental
Shuyue Li, Yansong Shen
Summary: A versatile mathematical approach is developed for monitoring gas-solid flow systems' internal states and process control, combining a CFD model and process controller simulation for real-time control of complex systems. This method proves effective in collaborative simulation of microscale flow details and macroscale process controller response.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Chemical
Shuyue Li, Yansong Shen
Summary: This study used a multi-fluid model to investigate the gas-solid hydrodynamics in a CDCL combustion unit, revealing that the solid circulation rate is controlled by the gas flow rate, higher combustor gas velocity reduces system pressure, and increased L-valve gas velocity affects local pressure.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Engineering, Chemical
Xiaobing Yu, Yansong Shen
Summary: A transient-state BF model is developed to describe dynamic in-furnace phenomena, capturing the time-evolution of flow, thermal, and chemical behaviors. Application of the model to an industry-scale blast furnace reveals significant changes in reacting flow after hot burden charging, with notable impact on furnace productivity in the initial 8-10 hours.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Shuai Wang, Yansong Shen
Summary: A CFD-DEM reacting model with thermochemical sub-models was developed to study gas-solid reacting flow in an ironmaking blast furnace. Simulation results indicated significant impacts of key operating parameters on raceway evolution, affecting cavity depth and CO production.
Article
Engineering, Chemical
Shuang Song, Liangwan Rong, Kejun Dong, Xuefei Liu, Pierre Le-Clech, Yansong Shen
Summary: The study developed a numerical model to simulate fluid flow through an asymmetric ceramic MF membrane and found that pore size and porosity are key parameters determining membrane permeability. By deriving a new intrinsic permeability function, the model can accurately predict membrane permeability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Review
Thermodynamics
Yiran Liu, Yansong Shen
Summary: This study reviews key aspects of biomass combustion in blast furnaces, including experimental and numerical studies, and the application of research findings. It covers biomass pretreatment, mathematical modeling, furnace phenomena understanding, among others, providing valuable insights for improving green ironmaking technology.
PROGRESS IN ENERGY AND COMBUSTION SCIENCE
(2021)
Article
Thermodynamics
Guang Yang, Yiran Liu, Lijuan Gao, Yingjie Su
Summary: The co-combustion of biochar and coal has the potential to increase the proportion of renewable energy in carbon-intensive and energy-intensive industries. This study investigated the combustion behavior of anthracite and Robinia pseudoacacia char, and found that the addition of Robinia pseudoacacia char resulted in lower ignition temperature and longer burning time. The co-combustion process also exhibited interaction effects and reduced activation energy. Kinetic methods and mechanism function models were used to analyze the combustion kinetics and validate the results.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Chemical
Yiran Liu, Yansong Shen
Summary: This paper investigates the effect of oxygen enrichment on coal combustion in the lower part of the blast furnace using a combination of heat and mass balance models and three-dimensional computational fluid dynamics models. The study shows that high oxygen enrichment enhances combustion efficiency, while high pulverised coal rates require more time and distance for preheating and devolatilisation, affecting coal combustion near the tuyere. However, the release of more heat from combustion particles benefits the continued combustion of unburned particles. This study highlights the importance of considering both feasible operation windows and the detailed impacts of oxygen enrichment on coal combustion in industrial blast furnace conditions.
Article
Energy & Fuels
Ming Jiang Gan, Yiran Liu, Yansong Shen
Summary: A novel ironmaking decarbonisation technology, co-injection of hydrogen and biochar (CoHB) in blast furnaces, is proposed for a feasible and sustainable carbon-neutral ironmaking. A three-dimensional computational fluid dynamics (CFD) model is developed to understand the internal combustion behavior related to CoHB. The model is validated and the results show that proper hydrogen injection can enhance biochar burnout, but the competition with oxygen hinders char reactions.
Article
Energy & Fuels
Guang Yang, Yiran Liu, Lijuan Gao, Yingjie Su
Summary: The combustion characteristics and kinetic behavior of Anthracite (AN), Robinia pseudoacacia char (RPC) and their blends were studied using non-isothermal thermogravimetric analysis. RPC showed better combustion reactivity compared to AN, and the addition of RPC enhanced the combustion reactivity of AN. The synergistic effect was observed during co-combustion of AN and RPC.
JOURNAL OF THE ENERGY INSTITUTE
(2022)
