Article
Thermodynamics
Fei Jin, Chao Xu, Jiaxin Xing, Xin Li, Xin Xia, Zhirong Liao
Summary: This study proposes titanium dioxide-based isothermal methanothermal and carbothermal redox cycles as efficient methods for solar fuel production and evaluates them thermodynamically. The results suggest that these cycles have the potential to become competitive routes for solar fuel production.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Metallurgy & Metallurgical Engineering
Shuai Li, Hui Shu, Hongling Wang, Di Wu
Summary: Carbon-bearing pellets of copper slag were isothermally reduced using biomass carbon as a reducing agent. The reduction process was found to be controlled by gas phase diffusion, and the apparent activation energy was determined to be 88.44 kJ/mol. The metallization rate of the pellets increased with temperature, with a maximum rate of 78.4% at 1200 degrees C.
MINING METALLURGY & EXPLORATION
(2023)
Article
Engineering, Environmental
Shakeel Ahmad, Feilong Gao, Honghong Lyu, Jingkang Ma, Beibei Zhao, Siyu Xu, Cholnam Ri, Jingchun Tang
Summary: This study investigates the removal of hexavalent chromium and nitrobenzene using iron and nitrogen doped biochar composites. The results show that the Fe1-N1-BC1 composite exhibits higher efficiency and stability in pollutant removal, and is capable of simultaneously removing different types of pollutants.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Jefferson E. Silveira, Alyson R. Ribeiro, Jaime Carbajo, Gema Pliego, Juan A. Zazo, Jose A. Casas
Summary: This study analyzes the role of natural groundwater and the effect of ions such as HCO3-, Ca2+, as well as pH on the photocatalytic nitrate reduction process. Control of these factors can lead to a high selectivity towards N-2.
Article
Green & Sustainable Science & Technology
Miao Li, Renlin Zhu, Run Huang, Xianfen Li, Xiaodong Lv, Jing Yang, Xue Deng, Xianze Long
Summary: This study investigated the vacuum carbothermal reduction of Ca-3(PO4)(2) with different MgO contents and its effects on the volatilization rate of P-2 and the phase transformation in a SiO2-C-Ca-3(PO4)(2)-MgO-based system. It was found that the volatilization rate of P-2 reached its peak at n(MgO/CaO) = 0.50. The phase of the reduced slag changed with increasing MgO content.
JOURNAL OF SUSTAINABLE METALLURGY
(2023)
Review
Thermodynamics
Youssef Berro, Marianne Balat-Pichelin
Summary: This study reviewed advanced technologies for the carbothermal reduction of alumina and magnesia using concentrated solar energy to achieve efficient regeneration of metal fuels. By optimizing operating parameters, highly-pure stable micro-sized powders were obtained, with further research needed to reduce unwanted Al-oxycarbides by-products for improved aluminum regeneration.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Metallurgy & Metallurgical Engineering
Yunfei Chen, Xiangdong Xing
Summary: This study thoroughly investigated the effect mechanism of MgO on the carbothermal reduction of Fe2TiO4, revealing that adding MgO can promote the reduction of Fe2TiO4 but also lead to worse aggregation of iron particles. The formation of magnesium titanium phases plays a key role in influencing the reduction process.
METALLURGICAL RESEARCH & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Changshun Chu, Jianting Liu, Liling Wei, Jiejie Feng, Huayi Li, Jianquan Shen
Summary: Fe3C and Fe2P-incorporated N-doped porous carbon (Fe3C/Fe2P@NC-N4Fe2) was prepared using the rich P element in radish via carbothermal reduction method without adding P resources. The catalyst showed excellent ORR performance due to abundant active sites provided by Fe3C and Fe2P and facilitated mass transfer by the porous structure in the N-doped carbon matrix. The AC-MFC assembled with Fe3C/Fe2P@NC-N4Fe2 as the cathodic ORR catalyst exhibited superior power output performance with 948.9 mW m-2, 1.03 times higher than that of 20 wt% Pt/C catalyst. Therefore, Fe3C/Fe2P@NC-N4Fe2 can be a viable alternative to Pt/C catalyst in AC-MFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Nanoscience & Nanotechnology
Mopidevi Manikanta Kumar, C. Retna Raj
Summary: In this study, a nitrogen and phosphorus dual-doped mesoporous carbon-encapsulated iron phosphide nanostructure was synthesized, and its multifunctional electrocatalytic activity towards various reactions in renewable energy technologies was demonstrated. The material showed excellent performance in zinc-air batteries and alkaline water-splitting applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Engineering, Chemical
Tlek Ketegenov, Kaster Kamunur, Aisulu Batkal, Rashid Nadirov
Summary: This study investigates the synthesis of barium sulfide using carbothermal reduction in compacted mixtures. The results demonstrate that compaction enhances the conversion of barium sulfate to sulfide and reduces the activation energy.
Article
Chemistry, Physical
Zeynep Baysal, Johann Kirchner, Marcel Mehne, Sven Kureti
Summary: The study investigates the impact of structural properties on the reduction behavior of ilmenite-type FeTiO3 towards H2. Small particles, crystallite sizes and high surface areas enhance the reduction rate of FeTiO3 samples in H2.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Omeshwari Yadorao Bisen, Shahan Atif, Ambresh Mallya, Karuna Kar Nanda
Summary: A universal carbothermal reduction strategy was reported for the synthesis of well-dispersed WS2 nanoparticles supported on N-doped carbon nanostructures. These WS2/NxC catalysts exhibit excellent electrocatalytic activity and stability for the oxygen reduction reaction. The study also reveals a correlation between the work function and the ORR activity.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
He Zhang, Na Wang, Jing Li, Yu-Qing Wang, Peng-Fa Feng, Yu-Fei Zuo, Guo-Hua Zhang, Kuo-Chih Chou
Summary: Ultrafine Mo (W) powders were obtained through a two-stage reduction process, including carbo-thermal pre-reduction of MoO3 (WO3) and deep hydrogen reduction. The increase in reaction time reduced the residual carbon contents of pre-reduced products without significantly affecting the particle sizes. After deep hydrogen reduction, the residual carbon contents of the obtained powders were further reduced.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
Article
Energy & Fuels
Jun Hao, Zhi-he Dou, Ting -an Zhang, Kun Wang, Xing-yuan Wan, Song Qi
Summary: This paper proposes a novel method for comprehensive disposal of fly ash to produce ferrosilicon without slag at low temperature and with high efficiency reduction under the action of Fe2O3. The study systematically investigates the promotion of Fe2O3 on the reduction and decomposition of fly ash, as well as the strengthening mechanism of the reduction and decomposition of mullite phase. Thermodynamic analysis and experimental results support the proposed carbothermal reduction process of fly ash and the decomposition mechanism of mullite, and suggest a new idea of preparing ferrosilicon and alumina/calcium aluminate byproducts through electric furnace melting.
Article
Chemistry, Physical
Ming Shi, Ruiwen Li, Yulin Liu
Summary: The research indicates that the LiFePO4/C composite material prepared using special copolymer carbon resource demonstrates excellent performance, including high discharge capacity, superior rate capability, and excellent cycling stability. The porous carbon layers allow for faster lithium ion diffusion and higher active sites, leading to outstanding battery performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)