Thermal Decomposition Behavior and Kinetic Study of Jamadoba Coal and Its Density Separated Macerals: A Non-Isothermal Approach

Autor:	Pragyan Senapati, D C Sau, Rabiranjan Murmu, Harekrushna Sutar, Sanchita Chakravarty, Amit Banerjee
Rok vydání:	2021
Předmět:	Thermogravimetric analysis Materials science business.industry Thermal decomposition Analytical chemistry Combustion Kinetic energy Isothermal process Thermogravimetry General Earth and Planetary Sciences Gravimetric analysis Coal business General Environmental Science
Zdroj:	Advances in Chemical Engineering and Science. 11:203-227
ISSN:	2160-0406 2160-0392
DOI:	10.4236/aces.2021.113013
Popis:	This kinetic study focuses on determining the thermal gravimetric profile of a particular grade of Indian sub-bituminous coal. A thermogravimetric analyzer (TGA-1000) was employed to investigate the thermal behavior and extract the kinetic parameters of Jamadoba coal and its corresponding density separated macerals. The weight loss was measured in air atmosphere. The coal samples used in this study were obtained from Jamadoba mines, Jharkhand. Samples of 35 mg and 200 μm mean size were subjected to synthetic air atmospheres (21% O2). Heating rates of 2, 5 and 7°C/min were applied until the temperature reached 1400°C, which was kept constant until burnout. Low heating rate was preferred so that devolatilization occurs prior to ignition and combustion. Derivative thermogravimetry (DTG) analysis method was applied to measure the weight changes and rates of weight loss used for calculating the kinetic parameters. The activation energy (Ea) and pre-exponential factor were obtained from model-free methods by applying non-isothermal thermogravimetry analysis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::175c544e9892e5ab1baca2849b9b93ef https://doi.org/10.4236/aces.2021.113013 Zobrazit plný text záznamu