eprintid: 12816
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/01/28/16
datestamp: 2023-11-10 03:27:22
lastmod: 2023-11-10 03:27:22
status_changed: 2023-11-10 01:49:36
type: article
metadata_visibility: show
creators_name: Abdulelah, H.
creators_name: Negash, B.M.
creators_name: Yekeen, N.
creators_name: Al-Hajri, S.
creators_name: Padmanabhan, E.
creators_name: Al-Yaseri, A.
title: Synergetic effect of surfactant concentration, salinity, and pressure on adsorbed methane in shale at low pressure: An experimental and modeling study
ispublished: pub
note: cited By 16
abstract: The influence of an anionic surfactant, a cationic surfactant, and salinity on adsorbed methane (CH4) in shale was assessed and modeled in a series of systematically designed experiments. Two cases were investigated. In case 1, the crushed Marcellus shale samples were allowed to react with anionic sodium dodecyl sulfate (SDS) and brine. In case 2, another set of crushed Marcellus shale samples were treated with cetyltrimethylammonium bromide (CTAB) and brine. The surfactant concentration and salinity of brine were varied following the Box-Behnken experimental design. CH4 adsorption was then assessed volumetrically in the treated shale at varying pressures (1-50 bar) and a constant temperature of 30 °C using a pressure equilibrium cell. Mathematical analysis of the experimental data yielded two separate models, which expressed the amount of adsorbed CH4 as a function of SDS/CTAB concentration, salinity, and pressure. In case 1, the highest amount of adsorbed CH4 was about 1 mmol/g. Such an amount was achieved at 50 bar, provided that the SDS concentration is kept close to its critical micelle concentration (CMC), which is 0.2 wt , and salinity is in the range of 0.1-20 ppt. However, in case 2, the maximum amount of adsorbed CH4 was just 0.3 mmol/g. This value was obtained at 50 bar and high salinity (-75 ppt) when the CTAB concentration was above the CMC (>0.029 wt ). The findings provide researchers with insights that can help in optimizing the ratio of salinity and surfactant concentration used in shale gas fracturing fluid. Copyright © 2020 American Chemical Society.
date: 2020
publisher: American Chemical Society
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85091050187&doi=10.1021%2facsomega.0c01738&partnerID=40&md5=c656e3b18f6fa33659d1e8b8f4f11095
id_number: 10.1021/acsomega.0c01738
full_text_status: none
publication: ACS Omega
volume: 5
number: 32
pagerange: 20107-20121
refereed: TRUE
issn: 24701343
citation:   Abdulelah, H. and Negash, B.M. and Yekeen, N. and Al-Hajri, S. and Padmanabhan, E. and Al-Yaseri, A.  (2020) Synergetic effect of surfactant concentration, salinity, and pressure on adsorbed methane in shale at low pressure: An experimental and modeling study.  ACS Omega, 5 (32).  pp. 20107-20121.  ISSN 24701343