Title: Variation in organic crystallite unit for different rank Indian coals by X-ray diffraction

Authors: Yash Jaiswal; Sunder Lal Pal; Lav Kush; Harsh Jaiswal

Addresses: Chemical Engineering Department, Faculty of Technology, Dharmsinh Desai University-Nadiad, Gujarat, 387001, India; Chemical Engineering Department, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, 462003, India ' Chemical Engineering Department, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, 462003, India ' Material Science and Metallurgical Engineering, Maulana Azad National Institute of Technology, Bhopal, Madhya Pradesh, 462003, India ' Civil Engineering Department, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India

Abstract: To improve the utilisation of Indian coals more efficiently, chemical and physical reactions between the coal and different reactants need to be established during its use. In view of this, assessment of different structural features of low-high rank Indian coals was performed. The detailed investigation and structural difference between four different rank Indian coals were obtained using XRD. Important structural parameters of heterogeneous coal sample like aromaticity, degree of disorder index, amorphous carbon fraction moreover size of crystallite with their distribution parameters like interplanner lamellar distance, crystallite height and diameter, lamellar counts were determined. The results show that coal rank, carbon content and vitrinite mean reflectance are the main parameters which controls the structure of the organic crystallite unit in coal. The variation of structural parameters with all three controlled variables is presented in this paper. This knowledge is helpful in improvising methods for the use of coal. [Received: March 27, 2021; Accepted: September 24, 2021]

Keywords: Indian coals; organic crystalline unit; aromaticity; X-ray diffraction; XRD; vitrinite reflectance.

DOI: 10.1504/IJOGCT.2022.123206

International Journal of Oil, Gas and Coal Technology, 2022 Vol.30 No.3, pp.312 - 333

Received: 26 Mar 2021
Accepted: 24 Sep 2021

Published online: 01 Jun 2022 *

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