relation: https://khub.utp.edu.my/scholars/14355/
title: Assessment of CO2/shale interfacial tension
creator: Al-Yaseri, A.
creator: Abdulelah, H.
creator: Yekeen, N.
creator: Ali, M.
creator: Negash, B.M.
creator: Zhang, Y.
description: Caprocks/CO2 interfacial tension (γsc) is an essential parameter that helps to provide insights into the interaction between CO2and caprocks. Lower values of γsc suggest stronger CO2- caprocks interaction (lower CO2capacity is inferred) and vice versa. Rocks/CO2 interfacial tension also explains why different minerals have different wettability to CO2 at the same pressure and temperature. Two caprock samples acquired from a potential CO2 storage site in New South Wales in Australia were used in this work. All the laboratory measurements were conducted at varying pressure from 5 MPa to 20 MPa and a temperature of 343 K. Our findings suggest that solid/CO2 interfacial tension (γsc) in caprocks is highly dependent on total organic carbon (TOC) percentage, pressure, and quartz content. γsc in sample-2 of higher TOC and quartz (TOC =0.11 wt, quartz = 62) is lower than γsc in sample-1 of lower TOC and quartz (TOC =0.081 wt, quartz = 31. The higher percentage of TOC and quartz increases the hydrophobic sites available in the sample, allowing stronger affinity towards CO2. Lower interfacial tension implies a stronger affinity of CO2 towards caprock surface (the high chance that CO2 will enter through caprocks and causes leakage). Therefore, it can be inferred that high TOC caprocks offer a lower CO2 trapping integrity, hence reducing their CO2 storage capacity. A remarkable relationship between solid/CO2 interfacial tension and CO2 density�which is easy to determine � at different pressures (up to 20 MPa) and 343 K temperature was also demonstrated in this work. This insight can significantly enhance Carbon Geosequestration processes' fundamental understanding. © 2021 Elsevier B.V.
publisher: Elsevier B.V.
date: 2021
type: Article
type: PeerReviewed
identifier:   Al-Yaseri, A. and Abdulelah, H. and Yekeen, N. and Ali, M. and Negash, B.M. and Zhang, Y.  (2021) Assessment of CO2/shale interfacial tension.  Colloids and Surfaces A: Physicochemical and Engineering Aspects, 627.   ISSN 09277757     
relation: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85110244664&doi=10.1016%2fj.colsurfa.2021.127118&partnerID=40&md5=dab1731d89ee84df46b156012e3a1e19
relation: 10.1016/j.colsurfa.2021.127118
identifier: 10.1016/j.colsurfa.2021.127118