Cargando…

Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)

[Image: see text] This study examines the influence of subcritical pressure and the physical nature (intact and powder) of coal samples on CO(2) adsorption capacity and kinetics in the context of CO(2) sequestration in shallow level coal seams. Manometric adsorption experiments were carried out on t...

Descripción completa

Detalles Bibliográficos
Autores principales: Almolliyeh, Maram, Tripathy, Snehasis, Sadasivam, Sivachidambaram, Masum, Shakil, Thomas, Hywel Rhys
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2023
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9948193/
https://www.ncbi.nlm.nih.gov/pubmed/36844552
http://dx.doi.org/10.1021/acsomega.2c07940
_version_ 1784892725911355392
author Almolliyeh, Maram
Tripathy, Snehasis
Sadasivam, Sivachidambaram
Masum, Shakil
Thomas, Hywel Rhys
author_facet Almolliyeh, Maram
Tripathy, Snehasis
Sadasivam, Sivachidambaram
Masum, Shakil
Thomas, Hywel Rhys
author_sort Almolliyeh, Maram
collection PubMed
description [Image: see text] This study examines the influence of subcritical pressure and the physical nature (intact and powder) of coal samples on CO(2) adsorption capacity and kinetics in the context of CO(2) sequestration in shallow level coal seams. Manometric adsorption experiments were carried out on two anthracite and one bituminous coal samples. Isothermal adsorption experiments were carried out at 298.15 K in two pressure ranges: less than 6.1 MPa and up to 6.4 MPa relevant to gas/liquid adsorption. The adsorption isotherms of intact anthracite and bituminous samples were compared to that of the powdered samples. The powdered samples of the anthracitic samples had a higher adsorption than that of intact samples due to the exposed adsorption sites. The intact and powdered samples of bituminous coal, on the other hand, exhibited comparable adsorption capacities. The comparable adsorption capacity is attributed to the intact samples’ channel-like pores and microfractures, where high density CO(2) adsorption occurs. The adsorption–desorption hysteresis patterns and the residual amount of CO(2) trapped in the pores reinforce the influence of the physical nature of the sample and pressure range on the CO(2) adsorption–desorption behavior. The intact 18 ft AB samples showed significantly different adsorption isotherm pattern to that of powdered samples for experiments conducted up to 6.4 MPa equilibrium pressure due to the high-density CO(2) adsorbed phase in the intact samples. The adsorption experimental data fit into the theoretical models showed that the BET model fit better than the Langmuir model. The experimental data fit into the pseudo first order, second order, and Bangham pore diffusion kinetic models showed that the rate-determining steps are bulk pore diffusion and surface interaction. Generally, the results obtained from the study demonstrated the significance of conducting experiments with large, intact core samples pertinent to CO(2) sequestration in shallow coal seams.
format Online
Article
Text
id pubmed-9948193
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-99481932023-02-24 Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K) Almolliyeh, Maram Tripathy, Snehasis Sadasivam, Sivachidambaram Masum, Shakil Thomas, Hywel Rhys ACS Omega [Image: see text] This study examines the influence of subcritical pressure and the physical nature (intact and powder) of coal samples on CO(2) adsorption capacity and kinetics in the context of CO(2) sequestration in shallow level coal seams. Manometric adsorption experiments were carried out on two anthracite and one bituminous coal samples. Isothermal adsorption experiments were carried out at 298.15 K in two pressure ranges: less than 6.1 MPa and up to 6.4 MPa relevant to gas/liquid adsorption. The adsorption isotherms of intact anthracite and bituminous samples were compared to that of the powdered samples. The powdered samples of the anthracitic samples had a higher adsorption than that of intact samples due to the exposed adsorption sites. The intact and powdered samples of bituminous coal, on the other hand, exhibited comparable adsorption capacities. The comparable adsorption capacity is attributed to the intact samples’ channel-like pores and microfractures, where high density CO(2) adsorption occurs. The adsorption–desorption hysteresis patterns and the residual amount of CO(2) trapped in the pores reinforce the influence of the physical nature of the sample and pressure range on the CO(2) adsorption–desorption behavior. The intact 18 ft AB samples showed significantly different adsorption isotherm pattern to that of powdered samples for experiments conducted up to 6.4 MPa equilibrium pressure due to the high-density CO(2) adsorbed phase in the intact samples. The adsorption experimental data fit into the theoretical models showed that the BET model fit better than the Langmuir model. The experimental data fit into the pseudo first order, second order, and Bangham pore diffusion kinetic models showed that the rate-determining steps are bulk pore diffusion and surface interaction. Generally, the results obtained from the study demonstrated the significance of conducting experiments with large, intact core samples pertinent to CO(2) sequestration in shallow coal seams. American Chemical Society 2023-02-10 /pmc/articles/PMC9948193/ /pubmed/36844552 http://dx.doi.org/10.1021/acsomega.2c07940 Text en © 2023 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Almolliyeh, Maram
Tripathy, Snehasis
Sadasivam, Sivachidambaram
Masum, Shakil
Thomas, Hywel Rhys
Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)
title Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)
title_full Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)
title_fullStr Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)
title_full_unstemmed Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)
title_short Effect of Physical Nature (Intact and Powder) of Coal on CO(2) Adsorption at the Subcritical Pressure Range (up to 6.4 MPa at 298.15 K)
title_sort effect of physical nature (intact and powder) of coal on co(2) adsorption at the subcritical pressure range (up to 6.4 mpa at 298.15 k)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9948193/
https://www.ncbi.nlm.nih.gov/pubmed/36844552
http://dx.doi.org/10.1021/acsomega.2c07940
work_keys_str_mv AT almolliyehmaram effectofphysicalnatureintactandpowderofcoalonco2adsorptionatthesubcriticalpressurerangeupto64mpaat29815k
AT tripathysnehasis effectofphysicalnatureintactandpowderofcoalonco2adsorptionatthesubcriticalpressurerangeupto64mpaat29815k
AT sadasivamsivachidambaram effectofphysicalnatureintactandpowderofcoalonco2adsorptionatthesubcriticalpressurerangeupto64mpaat29815k
AT masumshakil effectofphysicalnatureintactandpowderofcoalonco2adsorptionatthesubcriticalpressurerangeupto64mpaat29815k
AT thomashywelrhys effectofphysicalnatureintactandpowderofcoalonco2adsorptionatthesubcriticalpressurerangeupto64mpaat29815k