Article
Materials Science, Ceramics
Qiqiang Zhang, Shuai Fu, Detian Wan, Yiwang Bao, Qingguo Feng, Salvatore Grasso, Chunfeng Hu
Summary: The synthesis mechanism of sulfur-containing MAX phase Hf2SB was studied, and Hf2SB and Hf2S with high purity were successfully synthesized using thermal explosion synthesis method. The microstructure and crystal structure analysis confirmed the reaction mechanism.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jin Yuan, Jinqiu Guo, Zhiwei He, Leisheng Che, Shanshan Chen, Hongbo Zhang
Summary: The interaction between light and thermal energy in photo-thermal catalysis is still unclear. This study investigates the reaction mechanism of HCOOH decomposition under both thermal and photo-thermal energy using pressure dependency studies and H/D exchange experiments. The results show that the reaction follows the same mechanism under both conditions, but the presence of light-induced hot electrons enhances the reaction activity.
CHEMISTRY-A EUROPEAN JOURNAL
(2022)
Article
Engineering, Environmental
Fadoua Laasri, Adrian Carrillo Garcia, Mohammad Latifi, Jamal Chaouki
Summary: This study investigated the decomposition of phosphogypsum (PG) in the presence of carbon monoxide (CO). Experimental results showed that PG decomposes at temperatures above 600 degrees C, yielding mainly CaS at high CO partial pressures and CaO at low CO partial pressures. Thermodynamic simulations confirmed the experimental observations and indicated that a higher CO/CaSO4 molar ratio leads to a higher conversion rate.
Article
Thermodynamics
Qiming Lu, Zhen Wang, Shichao Zhang, Zhijie Qin, Xiaozhe Yu, Zhibin Chen, Jie Yu
Summary: The explosion of in-vessel dusts, mainly composed of tungsten, in fusion reactors poses a significant threat to their safe operation. However, experimental data on dust explosions in fusion devices are limited, hindering the assessment of reactor safety. This study conducted experiments to investigate the explosion characteristics and mechanisms of micro-tungsten dust in a 20 L spherical vessel. The results revealed the lower explosion limit of 2 μm tungsten dust and the factors influencing explosion parameters in fusion reactor environments.
COMBUSTION AND FLAME
(2023)
Article
Thermodynamics
Chang-Fei Yu, Shang-Hao Liu, Zi-Xia Xu, Wen-Tao Wang, Yin Wang
Summary: This study examines the thermal hazard of Butyl-3-methylimidazolium nitrate ([C(4)mim]NO3) and predicts potential explosive risks, providing insights into the thermal decomposition mechanisms and implications for safer production, storage, and transportation processes.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Environmental
Bingyou Jiang, Qi Yao, Mingqing Su, Jingjing Li, Kunlun Lu, Dawei Ding, Han Hong
Summary: This study investigates the inhibitory characteristics and mechanisms of ABC powder on coal powder explosion. The addition of ABC powder significantly decreases the maximum explosion pressure and can completely suppress coal dust explosions. The study also reveals the thermal decomposition characteristics and reaction kinetics of the mixed system.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2024)
Article
Engineering, Chemical
Tongtong Bian, Ning Song, Yuan Yu, Tianyang Zhang, Zhichao Lin, Yajie Bu, Qingwu Zhang, Tingting Chen, Zhongwei Chen, Jinzhi Li, Juncheng Jiang
Summary: This paper studied the explosion properties and pyrolysis mechanism of ABS dust during processing, as well as the inhibitory effects of sodium bicarbonate (NaHCO3) on ABS dust. The results showed that NaHCO3 effectively reduced the ignition sensitivity and explosion severity of ABS dust by increasing its mass fraction. Adding 50 wt% NaHCO3 could mitigate the explosion hazard to an acceptable level. The incorporation of NaHCO3 enhanced the heat stability of ABS dust, interrupted the combustion chain reaction, and inhibited the propagation of the explosion.
ADVANCED POWDER TECHNOLOGY
(2023)
Article
Engineering, Chemical
Miao Fei, Lei Ni, Tianyi Yan, Juncheng Jiang, Hang Yao, Han Zhang, Chenwei Dai
Summary: In this study, the exothermic and mechanism of the synthesis of tert-butyl hydrogen peroxide were investigated by combining experiments with theoretical calculation. The exothermic characteristic was analyzed using reaction calorimeter, while the thermal decomposition characteristics of reactants and products were analyzed using differential scanning calorimeter and adiabatic calorimeter. The reaction mechanism was analyzed using reaction calorimeter, gas chromatography, and density functional theory. The risk level of the reaction process was evaluated using risk matrix and Stoessel critical diagram.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2023)
Article
Materials Science, Multidisciplinary
Baoyan Liang, Zhen Dai, Qi Zhang, Wangxi Zhang, Ruijie Zhang, Ying Liu, Jizhou Zhang, Li Yang
Summary: The study investigated the effects of protective atmosphere, Al content, and microstructure on the performance of CrB-AlN based multi-component composite coating formed on a diamond surface through thermal explosion synthesis. The coating mainly consisted of CrB and AlN, with other by-products such as Cr5Al8 and Cr2AlB2.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Energy & Fuels
Xinyu Xiong, Kai Gao, Jie Mu, Bin Li, Dan Zhang, Lifeng Xie
Summary: The explosion mechanism of magnesium powder/hydrogen hybrid was studied, and it was found that the explosion pressure curve exhibits a bimodal structure under certain conditions. The characteristics of the explosion vary with the oxygen content.
Article
Energy & Fuels
Su-Lan Yang, Ke-Juan Meng, Wuxi Xie, Hongqi Nie, Qi-Long Yan
Summary: In this paper, a group of novel intermetallic metastable composites Al/Co@AP has been designed and prepared using spray-drying technique, demonstrating the successful obtaining of core-shell structured Al/Co@AP with desired properties. The thermal reactivity of Al/Co/AP composites has been investigated and compared, showing enhanced heat release and decreased reaction temperature compared to pure AP and Al/Co. The decomposition process and intermetallic reaction in the composite follow different physical models. The concentrations of certain gaseous products are lower in Al/Co@AP than pure AP due to the reaction with acidic substance from AP.
Article
Chemistry, Analytical
Zhuqing Fang, Shukui Li, Jiping Liu, Chuang Yu, Dongsen Zheng, Meizhuang Qiao
Summary: This study investigates the influence of lithium aluminium hydride (LiAlH4) on the decomposition process of cyclotrimethylenetrinitramine (RDX). The results show that LiAlH4 significantly decreases the decomposition temperature of RDX and alters its decomposition pattern.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Engineering, Environmental
Hang Yao, Lei Ni, Yinshan Liu, Gang Fu, Juncheng Jiang, Zhen Cheng, Yuqing Ni, Zhiquan Chen
Summary: The exothermic pattern of m-xylene nitration with mixed acid in semi-batch mode was studied using reaction calorimetry. Optimal reaction conditions were determined to achieve a yield of 95.5%. The thermal stability of nitration products and the reaction hazard were assessed, providing guidance for safe operation and scale-up.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Thermodynamics
Mahtab Vosough, Gholam Reza Khayati, Shahriar Sharafi
Summary: The study extensively investigated the thermal decomposition kinetics of molybdic acid as a precursor for molybdenum trioxide, revealing the transformation process and catalytic efficiency in methanol oxidation to formaldehyde.
THERMOCHIMICA ACTA
(2022)
Article
Thermodynamics
B. Kostova, V Petkova, Vl Kostov-Kytin, Y. Tzvetanova, G. Avdeev
Summary: This paper investigated the thermal properties and decomposition mechanism of natural thaumasite, revealing the formation of different solid phases during thermal decomposition. A chemical reaction scheme of thaumasite decomposition was proposed based on the experimental results, which is of fundamental importance for identifying thaumasite and practical applications in chemical archaeology, cement, and cement-based materials chemistry.
THERMOCHIMICA ACTA
(2021)