Author(s)

Deepak Chandra Sau¹, Amit Banerjee¹, Sanchita Chakravarty¹, Pragyan Senapati^2*, Rabiranjan Murmu³, Harekrushna Sutar³

¹CSIR-National Metallurgical Laboratory, Jamshedpur, India.
²Mechanical Engineering Department, ITER, SOA Deemed to Be University, Bhubaneswar, India.
³Chemical Engineering Department, Indira Gandhi Institute of Technology, Sarang, India.

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 (E_a) and pre-exponential factor were obtained from model-free methods by applying non-isothermal thermogravimetry analysis.

Thermal Decomposition, Kinetic Study, Jamadoba Coal, Non-Isothermal

Sau, D. , Banerjee, A. , Chakravarty, S. , Senapati, P. , Murmu, R. and Sutar, H. (2021) Thermal Decomposition Behavior and Kinetic Study of Jamadoba Coal and Its Density Separated Macerals: A Non-Isothermal Approach. Advances in Chemical Engineering and Science, 11, 203-227. doi: 10.4236/aces.2021.113013.