eprintid: 20156 rev_number: 2 eprint_status: archive userid: 1 dir: disk0/00/02/01/56 datestamp: 2024-06-04 14:19:53 lastmod: 2024-06-04 14:19:53 status_changed: 2024-06-04 14:16:43 type: conference_item metadata_visibility: show creators_name: Izman, I. creators_name: Mohshim, D.F. title: Isothermal Adsorption of CO2 in Shale as a Caprock at Different TOC ispublished: pub keywords: Adsorption; Adsorption isotherms; Carbon capture; Greenhouse effect; Offshore oil well production; Offshore technology; Shale; Suspensions (components), Adsorption behaviour; Cap rock; Carbon neutralities; CO 2 emission; Environmental conservation; Isothermal adsorption; Sealing characteristics; Shale formation; Silurian; Total organic contents, Carbon dioxide note: cited By 0; Conference of 2024 Offshore Technology Conference Asia, OTCA 2024 ; Conference Date: 27 February 2024 Through 1 March 2024; Conference Code:197405 abstract: Carbon dioxide (CO2) emissions are a significant contributor to global carbon and the resulting greenhouse effect. Reducing CO2 emissions, and even achieving carbon neutrality, has become a primary goal of environmental conservation worldwide. Carbon capture and storage (CCS) is a potential solution for reducing CO2 emissions by injecting captured CO2 into formations, such as shale. While shale formations have excellent sealing characteristics, CO2 diffusion into shale can limit the retention and maintenance of injected CO2. Understanding the adsorption behavior of CO2 in shale at different levels of total organic content (TOC) is therefore crucial. This study used a gravimetric approach to quantify the adsorption isotherm of CO2 in Eagle Ford shale sample with TOC value of 2.70 wt using Magnetic Suspension Balance (MSB) at pressure up to 1.5 MPa and temperature at 25°C with another samples from literature review which from Silurian Longmaxi shale and Ordovician Wufeng shale. The results showed that LMX 1, sample from Silurian Longmaxi shale, which had the highest TOC content (3.04 wt.), had the highest adsorption capacity for CO2. The Freundlich model was found to be the most accurate in describing the adsorption behavior with an R2 of 0.99 and an ARE () of less than 2. This study highlights the importance of modelling the TOC of shale with adsorption isotherms to determine adsorption properties, especially for predicting the adsorption capacity of organic matter. Copyright © 2024, Offshore Technology Conference. date: 2024 official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85186490602&doi=10.4043%2f34656-MS&partnerID=40&md5=5e7efced25889ba28361114722443d5c id_number: 10.4043/34656-MS full_text_status: none publication: Offshore Technology Conference Asia, OTCA 2024 refereed: TRUE citation: Izman, I. and Mohshim, D.F. (2024) Isothermal Adsorption of CO2 in Shale as a Caprock at Different TOC. In: UNSPECIFIED.