Insight into Liquid Interactions with Fibrous Absorbent Filter Media using Low-Field NMR Relaxometry. Prospective Application to Water/Jet Fuel Filter-Coalescence

Osman, KS and Taylor, Spencer (2017) Insight into Liquid Interactions with Fibrous Absorbent Filter Media using Low-Field NMR Relaxometry. Prospective Application to Water/Jet Fuel Filter-Coalescence Industrial and Engineering Chemistry Research, 56 (49). pp. 14651-14661.

Text IECR submission Sept 2017 revision.pdf - Accepted version Manuscript Restricted to Repository staff only until 20 November 2018. Download (1MB)

Abstract

We describe a low-field NMR relaxometry study of water and aviation turbine fuel (jet fuel) in contact with samples of fibrous media removed from an unused aviation fuel filter cartridge. This media was studied both in its as-received state and after modifying its wettability. The interaction of liquid droplets with fibers is the basis for fibrous coalescence widely used industrially to separate different types of liquid-liquid dispersion. Here, we are specifically concerned with interactions that potentially occur during the removal of entrained water from jet fuels, an application that is of particular importance on safety grounds, primarily to prevent ice formation in aircraft fuel tanks which could otherwise lead to fuel-line filter blockage and fuel starvation to the engines. Jet fuel is treated using various filtration systems, including cartridge-type microfilters and filter-coalescers, at different points between refinery and aircraft fuel tank in order to remove dirt (particulates) and water and ensure that contamination levels always meet the required specifications. The main objective of the present study was to apply proton NMR relaxometry to provide insight into the water coalescence process, specifically by probing water environments on fibrous media. On the basis of T2 (spin-spin) relaxation distributions, it has been confirmed that the water environments depend on the media wettability, with three environments being identified: fiber surface adsorbed water; inter-fiber absorbed water; and unassociated (largely bulk) water. The use of such NMR techniques may therefore offer potential for monitoring or improving filter-coalescer performance.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Chemistry
Authors :	Name Email ORCID Osman, KS Taylor, Spencer S.Taylor@surrey.ac.uk
Date :	20 November 2017
Identification Number :	10.1021/acs.iecr.7b03837
Copyright Disclaimer :	Copyright 2017 American Chemical Society
Depositing User :	Melanie Hughes
Date Deposited :	23 Nov 2017 09:42
Last Modified :	10 May 2018 12:24
URI:	http://epubs.surrey.ac.uk/id/eprint/845009

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