Kupai, MM, Yang, F, Harbottle, D et al. (3 more authors) (2013) Characterising rag-forming solids. Canadian Journal of Chemical Engineering, 91 (8). 1395 - 1401. ISSN 0008-4034
Abstract
In oil sands froth treatment, an undesirable intermediate layer, often accumulates during the separation of water-oil emulsions. The layer referred to as rag layer is a complex mixture of water, oil, solids and interfacially active components. The presence of a rag layer has a detrimental impact on the separation of water and fine solids from diluted bitumen. The current study focuses on characterisation of solids from a rag layer forming stream of a naphthenic froth treatment plant in an attempt to understand the mechanism of rag layer formation. Through detailed characterisation of rag-forming and non-rag-forming solids, the mineralogy of solids and their contamination were shown to be critical to rag layer formation. The iron-based minerals such as siderite and pyrite were found to be enriched within the rag layer. Analysis of surface organic complexes confirms a high level of organic matter associated with these solids through the binding of carboxylic acid group with iron on solids, resulting in a surface hydrophobicity susceptible for rag layer formation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2013 Canadian Society for Chemical Engineering. This is the peer reviewed version of the following article: Kupai, MM, Yang, F, Harbottle, D, Moran, K, Masliyah, J and Xu, Z (2013) Characterising rag-forming solids. Canadian Journal of Chemical Engineering, 91 (8). 1395 - 1401. ISSN 0008-4034 which has been published in final form at http://dx.doi.org/10.1002/cjce.21842. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. |
Keywords: | Rag layer; Iron-based minerals; Organic matter; Oil sands; Froth treatment |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) > Institute for Particle Science and Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 25 Jun 2015 13:00 |
Last Modified: | 16 Jan 2018 08:36 |
Published Version: | http://dx.doi.org/10.1002/cjce.21842 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/cjce.21842 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:85198 |