Effect of temperature and salt concentration on rheological behaviour of surfactin

Suleiman, SM ORCID: https://orcid.org/0000-0003-2098-8645, Abbas, AJ ORCID: https://orcid.org/0000-0002-0709-1713, Babaie, M, Akpan, EU ORCID: https://orcid.org/0000-0001-5589-2462, Yahaya, AA and Hassan, KY ORCID: https://orcid.org/0000-0001-6988-6442 2019, Effect of temperature and salt concentration on rheological behaviour of surfactin , in: SPE NAICE Conference Lagos 2019, 5th-7th August 2019, Lagos, Nigeria.

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Abstract

Behaviouralchanges of surfactants due to temperature fluctuations, and its interaction with saline environment, is very common during oil and gas operations. Exhibition of transient or permanent flow behaviour is one form of these changes. Therefore, effect of temperature and ionic concentrations (salinity) on flow behaviour of sodium surfactin was experimentally investigated. ORCADA®software-controlled OFITE viscometer (Model 1100)was used to conduct steady-shear study, at 23–50 oC temperature, 0.1–1.5 molar (M) salt concentrations and 0.025–1.0 % surfactin dosages. Sodium surfactin behaves as non-Newtonian fluid, with a pseudoplastic pattern exhibited in aqueous and 0.25-1.5M saline media. Effect of changes in temperature and salinity on apparent viscosity of surfactin was surfactant-dosage dependent. Furthermore, shear-thickening effect set in at a critical shear rate of 680.9s-1, signifying flow-induced self-aggregation. Surfactant dosages 0.075 and to a lesser extent 0.1% were minimally affected by changes in temperatures, salinity and rate of shear not exceeding 680.9s-1. The findingssuggest pumpability and dispersion characteristics of the biosurfactant.

Item Type: Conference or Workshop Item (Paper)
Schools: Schools > School of Computing, Science and Engineering
Journal or Publication Title: SPE NAICE Conference Lagos 2019
Publisher: Society of Petroleum Engineers
Depositing User: SM Suleiman
Date Deposited: 08 Jul 2019 09:15
Last Modified: 07 Jul 2020 12:22
URI: http://usir.salford.ac.uk/id/eprint/51749

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