Article
Chemistry, Physical
Linn Katinka Emhjellen, Ragnar Strandbakke, Reidar Haugsrud
Summary: Research on molten-solid composite oxides as oxygen transport membranes at intermediate temperatures shows that the electrical conductivity increases significantly when V2O5 melts and the oxygen red-ox reaction shifts from being rate limited by charge transfer to mass transfer processes. The ionic transport number also sees a significant increase, indicating a rise in relative oxide ion conductivity. Oxygen permeation across the composite membrane is estimated to be lower than for single-phase mixed conducting membranes but comparable to several dual-phase membranes.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Thermodynamics
Jintao Huang, Sha Lyu, He Han, Yanjiang Wang, Haoyang Sun, Jingtao Su, Yidong Liu, Yonggang Min, Dazhi Sun
Summary: The generation of syngas through biomass pyrolysis using molten copper slag as a heat source is an innovative technology in the chemical industry. This study investigated the factors affecting syngas yields and identified the mechanism of integrated looping gasification. The results showed that increasing the FeO/SiO2 mass ratio and minor elements contents improved the efficiency of syngas generation and reduced air pollutant emissions. Additionally, the solid ash waste could be used as soil nutrients, and the generated syngas could be utilized for electricity generation.
Article
Engineering, Chemical
Oluseye O. Agbede, G. H. Kelsall, K. Hellgardt
Summary: The study investigated the dissolution of oxygen in molten tin using a novel molten tin reformer, with a lanthanum strontium manganite double-layered reference electrode and an oxygen sensor employed for measurement. The solubility limit of oxygen, Gibbs energy change for tin oxide formation, and oxygen dissolution kinetics were established. The rate of oxygen dissolution was controlled by chemical reaction at the bubble-molten tin interface.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Ziwei Chen, Zhao Meng, Lili Liu, Hao Wang, Yongqi Sun, Xidong Wang
Summary: The research revealed that Mo ions in molten slags containing MoO3 are mainly hexavalent and in a four-coordinated state, significantly affecting the aggregation of Si-related frameworks and weakening bonds in Al complexes. As the MoO3 content increases, the polymerization of the entire slag network decreases, resulting in a gradual decrease in viscosity of molten slags at high temperatures.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Metallurgy & Metallurgical Engineering
Chengjun Liu, Rui Zhang, Yifan Meng, Zhen Wang, Shiyan Jiao, Jixiang Jia, Yi Min
Summary: By analyzing the structural behaviors of components through Raman spectroscopy, this study clarified the transformation mechanism of surface tension in relation to composition changes in CaO-MgO-SiO2-FexO-P2O5 slags. It was found that an increase in CaO/SiO2 ratio led to more non-bridging oxygen bonds and higher surface tension, while an increase in P=O bonds effectively reduced surface tension. Ultimately, a surface tension estimation equation was established based on the deconvolution results of melt structures.
ISIJ INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Yigui Lao, Guangqiang Li, Yunming Gao, Cheng Yuan
Summary: The wetting and corrosion characteristics of refractory by molten slag are important for understanding the corrosion mechanism and slag resistance. The study found that microporous magnesia aggregate has better slag resistance compared to fused magnesia. Slags with higher CaO/SiO2 value and MgO content have a greater ability to slow down the dissolution of refractory substrate. Surface tension and viscosity have a more significant impact on slag penetration than contact angle.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Ziwei Chen, Minghao Wang, Zhao Meng, Hao Wang, Lili Liu, Xidong Wang
Summary: A structure informed artificial neural network (SIANN) model was developed for predicting the viscosity of molten slags, integrating quantitative atom-level information to significantly improve prediction accuracy. The interpretability of the model was highlighted by selected structural features with strong determinant impact on viscosity. The obtained model outperformed other existing models in terms of prediction performance across various component systems.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Zhigang Yu, Jieyu Zhang, Haiyan Leng, Xiaochun Wu, Kuo-Chih Chou
Summary: Research has shown that using a geometrical model can effectively estimate the density and molar volume of ferrite-based ternary slags, providing important data for optimizing the metallurgical process.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Chemical
Jian Song, Zhigang Wang, Xiaoyao Tan, Yifan Cui, Sibudjing Kawi, Shaomin Liu
Summary: A BCFS perovskite hollow fiber membrane was prepared by phase inversion and sintering technique with the addition of Co2O3 to enhance mechanical strength and reduce sintering temperature. The membrane exhibits simultaneous permeation of hydrogen and oxygen, showing potential as a catalytic membrane reactor for various reactions. Simultaneous permeation enhances hydrogen and oxygen fluxes by reducing gas concentrations and promoting gas/ion exchange reactions.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Yongliang Zhang, Kevin Huang
Summary: Surface exchange kinetics and bulk diffusion of oxygen are crucial for the performance of oxygen electrocatalysis and electrochemical devices. In this study, oxygen surface exchange rates and bulk conductivity/chemical diffusivity were measured for three mixed oxide-ion and electron conductors. The results showed that one of the conductors exhibited the best oxygen electrocatalytic performance.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Metallurgy & Metallurgical Engineering
Jian-bin Chen, Jin-guang Li, Rong Chu, Ya-qin Sun
Summary: The study found that under the research conditions, the activity coefficient of FeO was inversely proportional to the FeO concentration, slightly increasing with higher MnO content, but gradually decreasing with increasing basicity.
IRONMAKING & STEELMAKING
(2021)
Article
Materials Science, Multidisciplinary
Xiao Yin, Bing Zheng, Dong Xu, Xiaolin Sun, Xuexi Wang, Chongmin Zhang
Summary: By mixing original BOFS and blast furnace slag at the hot stage, the content of f-CaO in the original BOFS was effectively reduced, resulting in a significant stabilization of f-CaO and a low content of 0.52% in the reconstructed and modified slag (R&MS) after the disposal process.
MATERIALS TODAY COMMUNICATIONS
(2022)
Review
Metallurgy & Metallurgical Engineering
Yan-zhu Huo, Hua-zhi Gu, Ao Huang, Bei-yue Ma, Liu-gang Chen, Guang-qiang Li, Ya-wei Li
Summary: This article introduces the dissolution behavior of Al2O3- and MgO-based oxides in molten slags, which are commonly found in the steelmaking industry. Understanding the dissolution mechanisms and influencing factors of these oxides in molten slags is crucial for prolonging the service life of refractories and improving the quality of steel.
JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Jian-bin Chen, Hong-hong Huang, Rong Chu, Ya-qin Sun
Summary: Through experiments and analysis, it was found that MnO, FeO, and basicity have significant effects on the activity coefficient of MnO, the distribution ratio of manganese, and the equilibrium concentration quotient in the smelting process of high manganese TWIP steel, with the activity coefficients of MnO being less than unity.
ISIJ INTERNATIONAL
(2021)
Article
Green & Sustainable Science & Technology
Ziwei Chen, Hao Wang, Minghao Wang, Lili Liu, Xidong Wang
Summary: This study developed a novel multilevel control method to improve the production stability of mineral wool made from molten slags. The research found that increasing the basicity of the slags can enhance their flowing and crystallization abilities. Mineral wool produced from slags with a basicity of 0.8 exhibited optimal morphology and mechanical properties.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Chemistry, Multidisciplinary
Valery V. Belousov
RUSSIAN CHEMICAL REVIEWS
(2017)
Article
Nanoscience & Nanotechnology
Valery V. Belousov, Sergey Fedorov
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Materials Science, Multidisciplinary
I. Kulbakin, A. A. Solovieva, S. Fedorov, V. V. Artemov, V. V. Belousov
INORGANIC MATERIALS
(2018)
Article
Materials Science, Multidisciplinary
Valery V. Belousov, Sergey V. Fedorov
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2019)
Article
Electrochemistry
Valery V. Belousov, Sergey Fedorov
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)
Article
Mechanics
Valery V. Belousov, Sergey V. Fedorov
Article
Chemistry, Multidisciplinary
Valery V. Belousov, Sergey Fedorov
Summary: Oxygen, the second-largest industrial gas, is mainly produced using cryogenic air separation technology. However, the current low-temperature technology has reached its limit, leading to the need for alternative technologies. MIEC ceramic membranes and diffusion-bubbling molten oxide membranes show promise, but cost and performance issues need to be addressed. Understanding bubble dynamics is crucial for controlling the transport properties of these membranes.
Article
Materials Science, Ceramics
Sergey Fedorov, Anton A. Klimashin, Valery V. Belousov
Summary: The newly developed core-shell structured molten oxide membranes with fast combined diffusion-bubbling oxygen mass transfer and theoretically infinite selectivity are of technological interest because of their high separation efficiency. In this study, a core-shell structured molten V2O5-Cu2O-based diffusion-bubbling membrane was prepared by thermal treatment. The effect of oxygen partial pressure on the thickness of the membrane shell is found, and the relationship between membrane shell thickness, oxygen partial pressure difference across the membrane, and oxygen permeation flux through the membrane is established.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Electrochemistry
P. E. Dergacheva, S. V. Fedorov, V. V. Belousov, A. A. Konovalov, V. V. Artemov
Summary: A symmetrical electrochemical cell composed of Bi3Ru3O11-35 wt % Bi2O3 porous electrode|Bi2O3-0.2 wt % B2O3 solid-molten electrolyte|Bi3Ru3O11-35 wt % Bi2O3 porous electrode was developed. The cell's resistances, efficiency, and flux were measured at 740°C using impedance spectroscopy and Coulomb volumetric technique, yielding values of 0.046 and 0.077 Ω cm(2), 97%, and 5x10(-7) mol cm(-2) s(-1), respectively. The impact of wetting the porous electrode surface on polarization resistance was analyzed. These materials hold great potential for use in electrochemical oxygen generators.
RUSSIAN JOURNAL OF ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Polina E. Dergacheva, Sergey V. Fedorov, Valery V. Belousov
Summary: New electrolytes with high oxygen ionic conductivity are necessary for efficient intermediate temperature electrochemical oxygen generators (IT-EOGs). The solid/molten Bi2O3-0.1 wt% B2O3 composite, with an ionic conductivity of 2.2 S cm(-1) at 740 degrees C, shows promise as an IT-EOG electrolyte.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Physical
Valery V. Belousov
Summary: Oxygen transport membranes are important devices for future separation processes in energy, environmental, and biomedicine fields. Diffusion-bubbling membranes (DBM) with high oxygen permeability and theoretically infinite selectivity are promising for efficient oxygen separation from air. Compared to conventional ceramic membranes, DBM have advantages such as highly mobile bubbles, low energy barrier for oxygen ion migration, flexibility and tightness of the selective shell, simplicity and ease of material fabrication, and low cost.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Valery V. Belousov, Sergey Fedorov
Summary: In the future separation processes relevant to energy engineering, oxygen-selective membranes are considered to be crucial. A newly developed diffusion-bubbling membrane based on molten copper and vanadium oxide shows promising potential for efficient oxygen separation with fast oxygen mass transfer. The study investigates the oxygen bubble nucleation and transport properties, establishing the relationship between bubble density, oxygen partial pressure, and oxygen permeation flux.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Sergey Fedorov, Mikhail S. Sedov, Valery V. Belousov
ACS APPLIED ENERGY MATERIALS
(2019)
Review
Electrochemistry
Valery V. Belousov, Sergey V. Fedorov, Mikhail S. Sedov
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Electrochemistry
I. Kulbakin, S. Fedorov, V. V. Belousov
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2018)