Article
Thermodynamics
Leo Courty, Philippe Gillard, Jordan Ehrhardt, Barbara Baschung
Summary: This article investigates the ignition and combustion parameters of two commercial insensitive propellants, finding that argon enhances combustion efficiency and nitrocellulose-based propellants are more reactive than RDX-based ones.
COMBUSTION AND FLAME
(2021)
Article
Energy & Fuels
Xueqiang Shi, Yutao Zhang, Xiaokun Chen, Yuanbo Zhang
Summary: A new method to calculate key parameters of coal self-heating and a global numerical model to explore the coal oxidation process were proposed. The coal oxidation process can be divided into three stages, which is essential for preventing coal spontaneous combustion.
Article
Energy & Fuels
Haiyan Wang, Bo Tan, Zhuangzhuang Shao, Yan Guo, Zhaolun Zhang, Changfu Xu
Summary: The study used experimental methods to investigate the influence of different FeS2 contents on the combustion characteristics of coal, confirming that a sulfur content of 3% had the greatest promotion effect on spontaneous coal combustion.
Article
Engineering, Chemical
Richard Kuracina, Zuzana Szabova, Laszlo Kosar, Martin Sahul
Summary: Nitrocellulose is a flammable compound produced by cellulose nitration, and its production and handling pose a risk of fire and explosion. It can be used as collodion cotton or as an explosive. The article examines the combustion parameters of dry nitrocellulose at different concentrations and with various types of igniters, finding that the choice of igniter affects the explosion parameters.
JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES
(2023)
Article
Geosciences, Multidisciplinary
Xiaoyuan Jiang, Shengqiang Yang, Buzhuang Zhou
Summary: This study investigated the changes in radical parameters and the reactivity and persistence of coal radicals at different temperature stages. The results showed that coal contains both transient and persistent radicals, with the former being highly reactive and quickly consumed, while the latter can exist for a long time. The research findings provide important insights into the mechanism of radical reactions during coal spontaneous combustion.
NATURAL RESOURCES RESEARCH
(2023)
Article
Thermodynamics
Li-Chi Hung, Nai-Hsin Pan
Summary: The energy released by azo compounds during decomposition can promote the polymerization process and improve reaction smoothness. However, it may also cause heat accumulation and runaway reactions. This study focuses on the low-temperature azo initiator AMBN, analyzing its reaction model and parameters.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Environmental
Ji Hoon Kim, Ho Sung Kim, Jeong Keun Cha, Hyun Soo Cho, Hong-Min Shim, Soo Hyung Kim
Summary: This study examines the effect of nitrocellulose encapsulation on the ignition and combustion characteristics of aluminum/potassium periodate energetic composites. The results show that optimized polymer encapsulation can greatly enhance the propulsion of small projectiles by compromising sensitivity and explosive reactivity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Jian Chen, Baoshan Jia, Ying Wen, Qinghe Jing, Linjie Liu
Summary: The spontaneous combustion parameters of lignite at different oxygen concentrations and temperatures were studied. The variation of export oxygen volume fraction of coal samples under different oxygen concentrations is similar. The CO concentration at the outlet of the coal sample increases with the increase in coal temperature. The distribution pattern of CO/CO2 ranging from 0 to 320 degrees C was similar at different oxygen concentrations.
Article
Thermodynamics
Limin Kang, Feiyang Xu, Jingping Liu, Xingyu Shao, Lin Jiang, Yimin Luo, Haolong Wang, Jihong Shan, Weimin Cong, Chenguang Zhu, Sen Xu
Summary: This research investigates the thermal characteristics and hazards of HAN-based liquid propellant using a combination of accelerating rate calorimeter and high-pressure differential scanning calorimetry. The research reveals the high self-heating rate and vulnerability to catastrophic explosion of the propellant. Moreover, the increase in storage temperature decreases the thermal explosion temperature and self-accelerating decomposition temperature of the propellant.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Bo Tan, Xiaozhen Song, Bohua Zhang, Zhuangzhuang Shao, Zixu Li, Shimin Liu
Summary: The effect of seawater on the oxidation and heat release characteristics of coal was studied. It was found that adding seawater increased the number of pores and cracks in the coal, decreased characteristic temperatures, and altered the functional groups of the coal, promoting spontaneous combustion.
THERMOCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Hongqing Zhu, Yujia Huo, Wei Wang, Xin He, Shuhao Fang, Yilong Zhang
Summary: This study investigated the reaction characteristics of hydroxyl groups in coal molecules, revealing that the reaction pathways and thermodynamic parameters are dependent on the position of the hydroxyl group. The presence of hydroxyl groups can lead to the generation of water and oxygen-containing free radicals during oxidation reactions, providing insights for assessing coal spontaneous combustion risk and developing flame retardants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
Jueli Yin, Linchao Shi, Zhen Liu, Wei Lu, Xingsong Pan, Zedong Zhuang, Lei Jiao, Biao Kong
Summary: This paper constructs a large-scale coal spontaneous combustion AE test system and conducts experimental tests on the AE signal in the process of coal spontaneous combustion. The results show that with the increase of temperature, the AE signal shows a trend of increasing fluctuations. The research reveals the mechanism of coal spontaneous combustion AE and its significance in detecting the position of coal spontaneous combustion.
Article
Thermodynamics
Jingyu Zhao, Gai Hang, Jiajia Song, Shiping Lu, Hanqi Ming, Jiaming Chang, Jun Deng, Yanni Zhang, Chi-Min Shu
Summary: This study compared the combustion characteristics of fresh and weathered coal samples and found that fresh coal burns more intensely while weathered coal is more prone to thermal decomposition. The combustion mechanisms of fresh and weathered coal were represented by the Jander and Avrami-Erofeev equations, respectively.
Article
Thermodynamics
Yan-Ni Zhang, An-Peng Wang, Long Chen, Chun-Hui Liu
Summary: Coal spontaneous combustion is caused by the generation and accumulation of heat. The oxidation process of coal occurs in stages with distinct characteristics, including endothermic, slow exothermic, and fast exothermic stages, mainly caused by reactions of methyl, methylene, hydroxyl, and carboxyl groups.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Xun Zhang, Jiahui Zou, Bing Lu, Ge Huang, Chen Yu, Huimin Liang
Summary: This study investigated the influence of mudstone on the spontaneous combustion of coal. TG-DSC experiments and thermal physical parameter test experiments were conducted to analyze the effects of different proportions of mudstone on the characteristic temperature, thermal effect, thermal physical parameters, and combustion characteristic index of coal. Fourier transform infrared spectroscopy was used to obtain the catalytic mechanism of mudstone on the active structure of coal oxidation. The results showed that an interaction exists between coal and mudstone, and different stages had different effects.
Article
Thermodynamics
Rong-Yu Chen, Pei-Hsuan Tung, Bin Laiwang, Horng-Jang Liaw, Chi-Min Shu
Summary: The study focused on the oxidation stability and thermal stability of commercially available 10W50 engine oil after adding hexadecyl mercaptan as an additive. Results showed that adding 3.0% hexadecyl mercaptan effectively improved the oil's stability and extended the oxidation time, with an increase in activation energy by approximately 20 kJ mol(-1).
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Hsin-Lun Wu, Yi-Hong Chong, Hwai-Chyuan Ong, Chi-Min Shu
Summary: As the awareness of green energy increases, electric vehicles and lithium-ion batteries have become the future trend, but the safety concerns caused by potential failures of lithium-ion batteries cannot be ignored. It is necessary to improve the safety of electrolytes to enhance safety, and the additive TTFP can effectively suppress fires and explosions in batteries while maintaining battery performance.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Shun-Chieh Chang, Yu-Chi Cheng, Xin-Hai Zhang, Chi-Min Shu
Summary: Incense is essential in Asia for religious and cultural purposes. However, the production of incense can lead to potential hazards such as dust explosions, highlighting the importance of studying and mitigating these risks.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Thermodynamics
Yang Xiao, Hong-Mei Zhang, Lan Yin, Chi-Min Shu, Qing-Wei Li
Summary: Coal-based activated carbon is prone to spontaneous combustion during storage and transportation. This study investigated the oxidation process and mechanism of different samples. The results showed that activated carbon has a developed pore structure and hydroxyl groups, which play a key role in spontaneous combustion.
COMBUSTION SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Venkata Subbaiah Munagapati, Hsin-Yu Wen, Jet-Chau Wen, Anjani R. K. Gollakota, Chi-Min Shu, Kun-Yi Andrew Lin, Jhy-Horng Wen
Summary: The study focuses on the chemical modification of lotus leaf powder to create a tertiary amine type powder named DMA-LLP, which proved to be an effective adsorbent for removing Reactive Red 195 (RR 195) from aqueous environments. The Langmuir model best described the adsorption equilibrium data, and thermodynamic parameters showed the spontaneous and endothermic nature of the adsorption process. Regeneration findings indicated that DMA-LLP could be reused up to five times with a maximum removal rate of 72% achieved after the fifth cycle.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2022)
Article
Chemistry, Applied
Ye-Cheng Liu, An-Chi Huang, Yan Tang, Xiao-Ming Ma, Ya-Ping Yang, Zhi-Hao Wu, Chi-Min Shu, Zhi-Xiang Xing, Jun-Cheng Jiang
Summary: In this study, the synthesis of 2,4,6-trinitrophenol from phenol was improved in terms of yield by adjusting the temperature range and using various analytical techniques to confirm the effectiveness of the synthesis process. Thermal stability of the synthesized product was investigated and a kinetic model was established.
JOURNAL OF ENERGETIC MATERIALS
(2023)
Editorial Material
Engineering, Chemical
Bin Zhang, Chi-Min Shu
PROCESS SAFETY PROGRESS
(2022)
Article
Geosciences, Multidisciplinary
Pengxiang Zhao, Jianan Wang, Shugang Li, Hao Li, Lei Qin, Haifei Lin, Chi-Min Shu, Laiwang Bin, Yongyong Jia, Zongyong Wei, Wenbo Pei
Summary: This study investigates the fracture distribution laws of gas migration channel in overburden for different recovery ratios through theoretical analysis and physical simulation experiments. The results show that as the recovery ratio increases, the height and average weighting step distance of the three zones decrease, while the maximum overburden subsidence volume, separation volume, and bulk coefficient increase. The through degree is used to describe the damage degree of fractures, and the fractal dimension increases with distance advancement and recovery ratio. The study also establishes criteria for determining geometric positions and a mathematical control model.
NATURAL RESOURCES RESEARCH
(2022)
Article
Mathematics, Interdisciplinary Applications
Ayaz Hussain Bukhari, Muhammad Asif Zahoor Raja, Naila Rafiq, Muhammad Shoaib, Adiqa Kausar Kiani, Chi-Min Shu
Summary: This study explores the application of artificial intelligence algorithms in stochastic numerical computing for the nonlinear fractional Rossler differential system. By introducing advanced transformations and radial basis neural networks (RNFN), the complex chaotic dynamics of the Rossler model are successfully solved, and the accuracy of the method is verified through comparisons with standard results.
CHAOS SOLITONS & FRACTALS
(2022)
Article
Energy & Fuels
Haitao Li, Shanshan Li, Fuer Zhai, Fengchuan Wang, Rongyang Lou, Xiaokun Chen, Chi-Min Shu, Minggao Yu
Summary: This study experimentally investigates the influence of pre-oxidized coal dust on the severity of deflagration and flame behaviors in methane-pulverized coal mixtures. The results show that pre-oxidation of coal dust increases the severity of explosion and prolongs the burning time of the mixtures. It also affects the flame morphology and brightness. Furthermore, pre-oxidized coal dust leads to increased complexity in the structure of solid residues.
Article
Energy & Fuels
Qiuhong Wang, Songping Yang, Juncheng Jiang, Zhu Liu, Chi-Min Shu
Summary: The effect of methane concentration on explosion characteristics, flame propagation mechanism, and spectrum characteristics was investigated. The results showed that methane concentration had an impact on flame propagation speed, flame temperature, explosion pressure, and spectrum intensity. The relationship between these parameters was revealed. Furthermore, the time characteristic of intermediate species' spectrum signal was influenced by flame propagation speed. When the methane concentration was 9.5%, the spectrum intensity of seven intermediate species exhibited two distinct trends.
Article
Engineering, Chemical
Yan Tang, Wei-Chun Chen, Hai-Lin Zhou, Jing-Yu Zhao, Chi-Min Shu, An-Chi Huang
Summary: This study investigated the spontaneous combustion characteristics of oxidized coal using various analysis methods. The results showed that the thermal decomposition of oxidized coal followed a two-stage reaction model, with the first stage reaction playing a dominant role in heat production.
Article
Geriatrics & Gerontology
Cheng-Kun Hsu, Cheng-Chang Liu, Tung Chang, Jing-Jing Liao, Chi-Min Shu
Summary: The aim of this research was to evaluate the use of smart alert bracelets by older adults diagnosed with dementia. The study found a positive correlation between the mode of wearing device, degree of dementia, and field configuration in the post-test results. Based on the experimental findings, suggestions were made to improve statistical calculations, equipment design, device charging, device selection, and notifications. The feedback from caregivers and older adults emphasized the importance of light and small design for better usability.
Article
Thermodynamics
Ye-Cheng Liu, An-Chi Huang, Yan Tang, Chung-Fu Huang, Qing Shen, Chi-Min Shu, Zhi-Xiang Xing, Jun-Cheng Jiang
Summary: This study investigates the thermal hazard risk and stability assessment of acetic anhydride, a crucial polymerization initiator. The optimal operating environment for acetic anhydride hydrolysis was found to be at 50 degrees Celsius. Utilizing the Arrhenius equation and a nonlinear regression model, the study confirmed that the acetic anhydride reaction system is autocatalytic with an n-order reaction.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Correction
Thermodynamics
Shun-Chieh Chang, Yu-Chi Cheng, Xin-Hai Zhang, Chi-Min Shu
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
