Article
Chemistry, Multidisciplinary
Hao Wei, Yuhan Peng, Hua Huang, Jianqi Fan, Jiangkuan Xing, Kun Luo, Jianren Fan, Lu Dai
Summary: The performance of the Bio-CPD model on tobacco pyrolysis was assessed and large deviations were found. To improve the model, a grid-search optimization strategy was used to modify the kinetic parameters and develop the Toba-CPD model, which could well reproduce the pyrolysis of different tobacco types under a wide range of heating rates.
Article
Energy & Fuels
Malgorzata Labus
Summary: This study focused on the decomposition reactions of pyrite under different atmospheres, in kerogen and bulk source rock, and the evolved gases. The results showed that only SO2 gas was detected during pyrite decomposition. Pyrite content over 10% in a rock sample can be detected, and SO2 is released during combustion and pyrolysis processes.
Article
Thermodynamics
Yan Tang, Yao Wu, Na Yang, Chun-Feng Miao, An-Chi Huang
Summary: In this study, the thermokinetic parameters and gas emission behaviors of nitrification waste were investigated using thermogravimetric analysis coupled with Fourier transform infrared spectrometry (TG-FTIR). The results showed that the thermal decomposition of nitrification waste could be divided into three stages and the activation energy was a quadratic function of the oxygen content. These findings can contribute to the understanding of the thermal behavior of nitrification waste and provide guidance for preventing thermal hazards.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Xiao Li, Lu Han, Peng Wang, Guo-Guang Wu, Xianliang Meng, Ruizhi Chu, Yong-Zhou Wan, Zong-Qing Bai, Wen Li
Summary: Sodium-rich coals are suitable for thermal dissolution and their structural changes during this process were studied using TG-FTIR. Thermal treatment reduced organic oxygen content in the coal, indicating oxygen removal and coal upgrading. Pyrolysis of extraction residues released lower CO2 levels compared to raw coal, suggesting decreased coal reactivity for further thermal conversion. Additionally, tetralin pre-hydrogenated raw coal and promoted the decomposition of -COO compounds, transforming exchangeable sodium species into water-soluble ones.
Article
Thermodynamics
Iwona Koltsov
Summary: By utilizing microwave hydrothermal synthesis and gas analysis, this study demonstrates that the PCN-Al2O3-ZrO2 nanocomposite prepared at 400 degrees Celsius exhibits good thermal stability, releasing mainly ammonia, cyanic acid, water, and carbon dioxide during thermal decomposition.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Chemistry, Physical
Celina Ziejewska, Agnieszka Bak, Krzysztof Hodor, Marek Hebda
Summary: This study investigates the influence of waste glass on lightweight geopolymer foams made from coal gangue and metakaolin. The results show that the addition of waste glass increases the compressive strength of the foams and the distribution of pores is homogeneous. It is important to recycle coal gangue and reuse waste glass to address environmental and economic issues.
Article
Thermodynamics
Xingqin Fu, Qiuchen Yang, Yuejun Zhang
Summary: The thermal decomposition behavior of polyacrylamide poly (methacryloyloxyethyl trimethylammonium chloride-acrylamide) (P(DMC-AM)) was studied using TG and DSC, revealing that an increase in cationicity led to higher thermal stability for P(DMC-AM). The evolved gases during degradation were analyzed using TG coupled with FTIR and MS, and a possible thermal composition mechanism was proposed and validated, providing useful information for expanding innovative applications.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2021)
Article
Environmental Sciences
Haobo Bi, Zhanshi Ni, Junjian Tian, Chunlong Jiang, Hao Sun, Qizhao Lin
Summary: This study investigates the effects of lignin on coal gangue pyrolysis, including characteristics, gas emissions, and reaction modeling. Experimental analysis reveals the synergistic interaction of lignin during the pyrolysis of coal gangue and determines the optimal mixing ratio. Furthermore, the study explores the mechanism by which lignin changes the CO2 release law of coal gangue pyrolysis.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Analytical
Yuewen Lu, Jiexin He, Wenchao Tong, Jiaxing Hou, Jimin Han, Li Yang
Summary: This study investigates the thermal behavior and gas evolution characteristics of zinc carbohydrazide perchlorate (ZnCP) and cadmium carbohydrazide perchlorate (CdCP). The results show that they have three mass-loss stages and different activation energies. The main evolved gases include H2O, CO2, CO, HNCO, HCN, N2O, N2, and NH3. This study provides sufficient evidence for studying the thermal behavior and mechanisms of these compounds and offers a promising thermal analysis technique for similar materials in aerospace and military applications.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2022)
Article
Energy & Fuels
Tianju Chen, Ruowei Dai, Dominic Yellezuome, Ke Zhang, Ruidong Zhao, Guangrui Liu, Jinhu Wu
Summary: The study of three coal samples with different densities from Naomaohu (NMH) coal showed that density has a significant impact on the functional groups and crystalline structure of the coal samples, with low-density coal exhibiting the highest weight loss rate during the pyrolysis stage. The results also revealed distinct peaks in the DTG curves and two emission peaks during the pyrolysis and polycondensation stages for light gases such as CO2, CO, and CH4.
Article
Thermodynamics
Yuan Jiang, Peijie Zong, Xue Ming, Haixin Wei, Xin Zhang, Yuan Bao, Bin Tian, Yuanyu Tian, Yingyun Qiao
Summary: The study investigated the influence of temperature and particle size on the high-temperature fast pyrolysis behaviors of Shenmu(Yulin) coal. Results showed that different parameters led to varied yields of coal-char, coal-tar, and coal-gas, with the particle size affecting coal-char and coal-tar differently.
Article
Energy & Fuels
Cong Ding, Zongxiang Li, Jiren Wang, Pengbo Duanmu, Bing Lu, Dameng Gao
Summary: This study shows that pyrite has a catalytic effect on the spontaneous combustion of coal. Fe3+ exhibits the strongest catalytic ability, significantly reducing the ignition time of coal. With increasing coal metamorphic degree, the promotion effect of Fe2+ weakens, while H+ has the greatest promotion effect on the low-temperature oxidation of coal. The oxidation reaction of pyrite mainly occurs through the oxidizability of Fe3+ and Fe2+, while H+ promotes coal oxidation by adsorbing oxygen and removing ash to increase the specific surface area.
Article
Chemistry, Analytical
Yitao Liu, Zhiyuan Zhao, Ruiyu Chen, Xiaokang Xu
Summary: This study investigates the thermal decomposition behaviors of polymers infiltrated with combustible liquids, providing a theoretical basis and guidance for predicting fire development, selecting or designing fire detection systems, and designing ventilation and fire extinguishing systems.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Thermodynamics
Yuan Jiang, Peijie Zong, Bin Tian, Xue Ming, Fanfan Xu, Yuanyu Tian, Yingyun Qiao, Dawei Li, Qingshuo Song, Qiankun Yu
Summary: Studying the pyrolysis behavior of the saturate component in coal, which mainly consists of volatile substances, through the combined utilization of TG-FTIR and Py-GC/MS revealed a free radical reaction mechanism. The research provides a methodological model for exploring other group components and reveals specific details about the pyrolysis of coal.
Article
Thermodynamics
Ruidong Zhao, Jianguang Qin, Tianju Chen, Jinhu Wu
Summary: The combustion behaviors and pollutants emission characteristics during co-combustion of bituminous coal semicoke and lignite were investigated. The addition of lignite improved the combustion performance and high heating rate increased the combustion intensity. The lignite blend ratio affected the combustion process and emission characteristics.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
