Article
Materials Science, Multidisciplinary
Seongkyu Cho, Leonardo Tomas da Rocha, Byung-Jun Chung, Sung-Mo Jung
Summary: Nitrogen oxide (NO) gas is a major environmental pollutant generated by the steel industry. The conversion of nitrogen to NO in coal is influenced by the ratio of fixed carbon (FC) to volatile matter (VM), and the functional forms of nitrogen vary depending on coal grade.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2021)
Article
Energy & Fuels
Faustyna Wieronska-Wisnewska, Dorota Makowska, Andrzej Strugala
Summary: The research presented in the paper focused on determining the content and mode of arsenic occurrence in Polish commercial coal, finding that arsenic in coal is mainly associated with mineral matter. The study also showed that the amount of arsenic passing to gas during combustion is influenced by the parameters of the combustion process and the chemical composition of the coals. Statistical analysis indicated that the presence of arsenic in coal, mainly in association with disulphides, carbonates, and sulphates, significantly influences the amount of Asgas in the flue gas.
Review
Materials Science, Ceramics
Anna Galotta, Vincenzo M. Sglavo
Summary: Cold sintering process (CSP) has gained global attention for its environmentally friendly and innovative fabrication route, reducing processing time, energy, and costs significantly. The process densifies ceramic powder with the aid of a liquid phase under intense pressure and limited heating conditions, achieving extraordinary results. The review explores processing features, possible densification mechanisms, and challenges, paving the way for new processing opportunities in the future.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Review
Energy & Fuels
Wenju Shi, Jin Bai, Lingxue Kong, Huaizhu Li, Zongqing Bai, Stanislav V. Vassilev, Wen Li
Summary: The issues related to coal ash have hindered the industrialization of entrained flow gasification, but through exploration and research on the fusion process of coal ash, certain indices for evaluating sintering and slagging severity can be identified. Additionally, research on mineral transformation, molecular dynamics simulations, and kinetic analysis play crucial roles in studying the ash fusion mechanism.
Article
Engineering, Environmental
Xuexue Wang, Lei Zhang, Kongyun Zhu, Changjing Li, Yulin Zhang, Aimin Li
Summary: The study utilized pressure-assisted sintering method to treat MSWI fly ash, producing high-strength ceramic products with compressive strength significantly higher than conventional construction materials, while heavy metals leaching concentrations were below the standard limit. Increased mechanical properties and decreased heavy metals leaching concentrations were mainly attributed to the increased density and crystalline degree.
Article
Materials Science, Multidisciplinary
Xiaohui Fan, Xiaolong Wang, Zhiyun Ji, Xianwei Li, Min Gan, Yifan Wang, Haoxiang Zheng, Xuling Chen, Zengqing Sun, Xiaoxian Huang
Summary: This investigation reveals the corrosion mechanism and physicochemical characteristics of the sintering grate bar, including the features of the adhesive layer, corrosion layer, and metal layer. The potential corrosion mechanism includes high-temperature oxidation, chlorine corrosion, and sulphate corrosion. These research findings are important for guiding the development of grate bar corrosion control technologies.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Chemistry, Inorganic & Nuclear
Wei Feng, Guoping Hu, Eric F. May, Gang Kevin Li
Summary: This study evaluated two methods for synthesizing zeolite from CFBFA and optimized the synthesis conditions. The low-temperature hydrothermal method resulted in a mixture of zeolites A and X, while the alkali fusion followed by hydrothermal method produced high-quality pure phase zeolite A.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Thermodynamics
Marieta K. Zakaryan, Narine H. Amirkhanyan, Khachik T. Nazaretyan, Suren L. Kharatyan, Khachatur V. Manukyan
Summary: This work presents the combustion synthesis mechanism using hexamethylenetetramine as fuel and nickel nitrate as oxidizer. Detailed investigations reveal the multistage decomposition of the oxidizer and sublimation of the fuel, resulting in the release of nitrogen, hydrazine, and methane. The highly exothermic reactions between nitrogen oxides emitted during the decomposition of the oxidizer and methane and hydrazine determine the maximum temperature of combustion. Excessive amounts of hydrazine and methane reduce nickel oxide to nanoscale nickel, which readily consolidates into samples of high relative densities.
COMBUSTION AND FLAME
(2023)
Article
Energy & Fuels
Xiaojin Guo, Yunhan Xiao, Lifeng Zhao, Lei Shi, Xiaoyong Xue, Xiquan Li, Zhenyu Liu
Summary: Through studying the combustion behaviors of coal and chars using different methods, the combustion process can be divided into different temperature regions, and the roles of different covalent bonds in the combustion process, as well as how to choose more suitable methods to prepare chars as alternative feeds, can be understood.
Article
Environmental Sciences
Jiao Wang, Ran Yan, Zhiyi Liu, Junxiu Wang, Panlong Zhang
Summary: This paper studied the chemical composition, surface morphology characteristics, and mineralogical characteristics of feed coals from six power plants. It also examined the alteration behavior of mineral phases, functional groups, and trace elements during combustion. The study found that the apparent morphology of the feed coals differed in compactness and order, but had a similar lamellar shape. The main minerals in the feed coals were quartz, kaolinite, calcite, and illite. Combustion of the feed coals resulted in the loss of most organic functional groups, but the group of -CH2 and the aromatic hydrocarbon bond (Ar-H) still existed in the ash. The study also analyzed the forms of Pb and Cr in combustion products and their relationship with diameter, coal species, and feed coal.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Ceramics
Jiawei Wei, Bingqiang Han, Yaowu Wei, Nan Li, Yilong Wang, Junlong Duan, Jiali Fu
Summary: This paper studied the influence of CaO, MnO, and Cr2O3 on the decomposition mechanism, sintering process, and properties of zircon ceramics. The results showed that the addition of CaO accelerated the decomposition rate of zircon but weakened the properties. Cr2O3 limited the sintering process and grain growth. MnO promoted grain growth and had no effect on the decomposition of zircon.
CERAMICS INTERNATIONAL
(2022)
Article
Thermodynamics
Hao Liu, Zenghua Li, Guodong Miao, Jingjing Yang, Xiangqiang Wu, Jiahui Li
Summary: The oxidation reaction intensity and changes in functional groups of coal during spontaneous combustion latency were studied. It was found that temperature and particle size have significant effects on the reaction, and the temperature dependence of reaction rate does not conform to the Arrhenius equation. The results provide important insights into the oxidation mechanism of coal during spontaneous combustion latency.
Article
Chemistry, Physical
Yongchao Zhu, Na Li, Wei Li, Liwei Niu, Zhenghui Li
Summary: The powder metallurgy process of the Al-graphene system was investigated using molecular dynamics (MD) simulations. Graphene can reduce pore and metal grain sizes, improving the mechanical properties of the composite.
Article
Geosciences, Multidisciplinary
Prasenjeet Chakraborty, Bodhisatwa Hazra, Pinaki Sarkar, Ashok K. Singh, Pradeep K. Singh, Saroj Kumar
Summary: In this study, thermal behaviors of coal samples from different open cast mines in India were examined using various analytical techniques. The results showed that the rank of coal played a critical role in determining its combustion parameters, with higher rank coals requiring higher temperatures for combustion. The Rock-Eval S4T(peak) was found to be a useful tool for determining the thermal maturity level of coals.
NATURAL RESOURCES RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Al Basir, Abu Bakar Sulong, Nashrah Hani Jamadon, Norhamidi Muhamad, Ukwueze Bonaventure Emeka
Summary: Powder injection molding (PIM) has evolved into micro-powder injection molding (mu PIM) and become a key manufacturing technique for producing components in electronic, automobile, and biomedical fields. This article reviews the important process parameters for fabricating parts with different materials using these techniques, and provides a brief discussion on future research guidelines in two-component macro and micro powder injection molding.
METALS AND MATERIALS INTERNATIONAL
(2021)