Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83

Water-in-crude oil (W/O) emulsions are found in many industries such as cosmetic, pharmaceutical, and petroleum. The study was aimed to investigate the rheological properties and the stability mechanism of W/O emulsions at different water to oil ratios of (20-80 vol.%) and (40-60 vol.%). The emulsio...

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Main Authors:	Akbari, Sweeta, Nour, A. H., Saidatul Shima, Jamari, Fayaz, Fahim
Format:	Article
Language:	English English
Published:	Asian Research Publishing Network (ARPN) 2016
Subjects:	TP Chemical technology
Online Access:	http://umpir.ump.edu.my/id/eprint/12623/ http://umpir.ump.edu.my/id/eprint/12623/ http://umpir.ump.edu.my/id/eprint/12623/1/fkksa-2016-Sweeta-Rheology%20and%20stability%20mechanism.pdf http://umpir.ump.edu.my/id/eprint/12623/7/fkksa-2016-Sweeta-Rheology%20and%20stability%20mechanism.pdf

id	ump-12623
recordtype	eprints
spelling	ump-126232019-10-03T07:57:21Z http://umpir.ump.edu.my/id/eprint/12623/ Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83 Akbari, Sweeta Nour, A. H. Saidatul Shima, Jamari Fayaz, Fahim TP Chemical technology Water-in-crude oil (W/O) emulsions are found in many industries such as cosmetic, pharmaceutical, and petroleum. The study was aimed to investigate the rheological properties and the stability mechanism of W/O emulsions at different water to oil ratios of (20-80 vol.%) and (40-60 vol.%). The emulsions were stabilized by a non-ionic surfactant (Span 83) at concentrations of 1.5-2.5 vol.%. The heavy and light crude oils were mixed at 50-50 vol.% and characterized in terms of physical and chemical properties. From the results, it was found that the emulsion with higher water volume fraction obtained more viscosity with larger droplet sizes which present low stability. As well as, the higher viscosity was obtained in emulsion with higher emulsifier concentration (2.5 vol.%). However, 20-80 % W/O emulsion and emulsions stabilized with 2.5 % Span 83 produced more stable emulsions as observed through the optical microscopy images. In order to determine the dynamic viscosity, different temperatures from (30 to 90 ºC) and spindle rotational speeds from (50 to 250 rpm) were used. Furthermore, all types of prepared emulsions were visually stable over a period of more than one week, where no water separation was observed during this period, besides; they exhibited a non- Newtonian shear thinning fluid behavior. Asian Research Publishing Network (ARPN) 2016 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/12623/1/fkksa-2016-Sweeta-Rheology%20and%20stability%20mechanism.pdf application/pdf en http://umpir.ump.edu.my/id/eprint/12623/7/fkksa-2016-Sweeta-Rheology%20and%20stability%20mechanism.pdf Akbari, Sweeta and Nour, A. H. and Saidatul Shima, Jamari and Fayaz, Fahim (2016) Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83. ARPN Journal of Engineering and Applied Sciences, 11 (4). pp. 2230-2235. ISSN 1819-6608 http://www.arpnjournals.org/jeas/research_papers/rp_2016/jeas_0216_3631.pdf
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Akbari, Sweeta Nour, A. H. Saidatul Shima, Jamari Fayaz, Fahim Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83
description	Water-in-crude oil (W/O) emulsions are found in many industries such as cosmetic, pharmaceutical, and petroleum. The study was aimed to investigate the rheological properties and the stability mechanism of W/O emulsions at different water to oil ratios of (20-80 vol.%) and (40-60 vol.%). The emulsions were stabilized by a non-ionic surfactant (Span 83) at concentrations of 1.5-2.5 vol.%. The heavy and light crude oils were mixed at 50-50 vol.% and characterized in terms of physical and chemical properties. From the results, it was found that the emulsion with higher water volume fraction obtained more viscosity with larger droplet sizes which present low stability. As well as, the higher viscosity was obtained in emulsion with higher emulsifier concentration (2.5 vol.%). However, 20-80 % W/O emulsion and emulsions stabilized with 2.5 % Span 83 produced more stable emulsions as observed through the optical microscopy images. In order to determine the dynamic viscosity, different temperatures from (30 to 90 ºC) and spindle rotational speeds from (50 to 250 rpm) were used. Furthermore, all types of prepared emulsions were visually stable over a period of more than one week, where no water separation was observed during this period, besides; they exhibited a non- Newtonian shear thinning fluid behavior.
format	Article
author	Akbari, Sweeta Nour, A. H. Saidatul Shima, Jamari Fayaz, Fahim
author_facet	Akbari, Sweeta Nour, A. H. Saidatul Shima, Jamari Fayaz, Fahim
author_sort	Akbari, Sweeta
title	Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83
title_short	Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83
title_full	Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83
title_fullStr	Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83
title_full_unstemmed	Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83
title_sort	rheology and stability mechanism of water-in-crude oil emulsions stabilized by span 83
publisher	Asian Research Publishing Network (ARPN)
publishDate	2016
url	http://umpir.ump.edu.my/id/eprint/12623/ http://umpir.ump.edu.my/id/eprint/12623/ http://umpir.ump.edu.my/id/eprint/12623/1/fkksa-2016-Sweeta-Rheology%20and%20stability%20mechanism.pdf http://umpir.ump.edu.my/id/eprint/12623/7/fkksa-2016-Sweeta-Rheology%20and%20stability%20mechanism.pdf
first_indexed	2023-09-18T22:14:26Z
last_indexed	2023-09-18T22:14:26Z
_version_	1777415242966368256

Rheology and Stability Mechanism of Water-in-crude Oil Emulsions Stabilized by Span 83

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