eprintid: 15062
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/50/62
datestamp: 2023-11-10 03:29:40
lastmod: 2023-11-10 03:29:40
status_changed: 2023-11-10 01:58:32
type: article
metadata_visibility: show
creators_name: Abunowara, M.
creators_name: Sufian, S.
creators_name: Bustam, M.A.
creators_name: Babar, M.
creators_name: Eldemerdash, U.
creators_name: Bencini, R.
creators_name: Ullah, S.
creators_name: Assiri, M.A.
creators_name: Al-Sehemi, A.G.
creators_name: Mukhtar, A.
title: Experimental and theoretical investigations on kinetic mechanisms of low-pressure CO2 adsorption onto Malaysian coals
ispublished: pub
keywords: Activation energy; Adsorption; Carbon dioxide process; Coal; Coal deposits; Diffraction; Diffusion in solids; Fourier transform infrared spectroscopy; Kinetics; Matrix algebra, Adsorption mechanism; Diffraction analysis; Intra-particle diffusion; Kinetic investigations; Particle diffusion model; Theoretical investigations; Thermodynamic model; Volumetric techniques, Carbon dioxide
note: cited By 16
abstract: The adsorption mechanism of carbon dioxide (CO2) in the coal matrix is significant in practical stability and migration process of CO2 into a coalbed seam. This study presents the kinetic investigation and the main controlling step of CO2 adsorption capacity onto Malaysian coals. The experimental data of CO2 adsorption were determined using a volumetric technique at 273, 298, 308, and 318 K and pressures up to 99.3 kPa. The experimental data of CO2 adsorption was studied using kinetic based thermodynamic models. Fourier Transform Infrared Spectroscopy and X�Ray Diffraction analyses were performed for the coal samples characterization. The major functional group in all coal samples is hydroxyl (�OH) functional group. X�Ray Diffraction analysis has shown that the coal samples possessed one major peak assigned to quartz (d = 3.348 à ). The experimental results were correlated using kinetic models, which include pseudo�first�order, pseudo�second�order, Avrami, and Intra-particle diffusion models. The Intra�particle diffusion model was found in the best compliance with the experimental data. Therefore, the pore�diffusion is considered to be the primary limiting step for CO2 interaction with the coal matrix. This indicated that the molecules of CO2 transferred rapidly from the bulk to the surface of coal matrix and slowly diffused into pores of the coal matrix. The obtained results demonstrated that the overall CO2 interaction with the coal matrix is influenced by the diffusion limiting step. The value of activation energies for all studied coal samples is lower than 8 kJ/mol. This showed that CO2 adsorption onto all investigated coal samples is driven by a physical adsorption process. © 2021 Elsevier B.V.
date: 2021
publisher: Elsevier B.V.
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85100663808&doi=10.1016%2fj.jngse.2021.103828&partnerID=40&md5=63ea2c3661e718e92231323f7ce285ec
id_number: 10.1016/j.jngse.2021.103828
full_text_status: none
publication: Journal of Natural Gas Science and Engineering
volume: 88
refereed: TRUE
issn: 18755100
citation:   Abunowara, M. and Sufian, S. and Bustam, M.A. and Babar, M. and Eldemerdash, U. and Bencini, R. and Ullah, S. and Assiri, M.A. and Al-Sehemi, A.G. and Mukhtar, A.  (2021) Experimental and theoretical investigations on kinetic mechanisms of low-pressure CO2 adsorption onto Malaysian coals.  Journal of Natural Gas Science and Engineering, 88.   ISSN 18755100