ORCID Profile
0000-0002-7033-7368
Current Organisation
University of Leeds
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Publisher: Elsevier BV
Date: 08-2008
Publisher: Elsevier BV
Date: 07-2006
DOI: 10.1016/J.JCIS.2006.02.055
Abstract: Recent studies have demonstrated that pure hydrocarbon oils can be dispersed in water as fine droplets without the use of additives. The high interfacial tension between hydrocarbons and water is expected to cause cavitation between oil droplets during separation. This cavitation is aided by dissolved atmospheric gases present in both the oil and water. Their removal allows oil droplets to be readily dispersed in water. In this paper we report on the effect of the de-gassing process on the dispersion of several natural, water immiscible oils. These natural, mixed oils are eucalyptus, lavender and tea tree oil. Although these oils are mixtures and in some cases not as hydrophobic as those used in the earlier studies, the effect of de-gassing substantially enhances their dispersion, producing micron-sized droplets without the need for additives. Dispersions of these natural oils in pure water have a wide range of uses where purity is an advantage, for ex le, in skin cleaning products and oral sprays.
Publisher: American Chemical Society (ACS)
Date: 12-06-2009
DOI: 10.1021/JP901801K
Abstract: In this work we have studied the evaporative cooling effect produced in a continuous flow air bubble column, containing water and salt solutions. We have established that, at equilibrium, a significant reduction in temperature is produced in an insulated, continuous flow, bubble column. For ex le, with a continuous flow of inlet air at 22 degrees C, a water bubble column cools to about 8 degrees C, at steady state equilibrium. The cooling effect observed in a continuous bubble column of concentrated aqueous salt solution could be used for commercial applications, such as for evaporative cooling systems. We have developed a simple method, based on the steady state thermal energy balance developed in a bubble column, to determine the latent heat of vaporization of the liquid in the column. Only the equilibrium temperature of the bubble column, the temperature of the inlet gas and the hydrostatic pressure across the column need to be measured. This analysis has been used to determine the heat of vaporization for water and some concentrated salt solutions.
Publisher: American Chemical Society (ACS)
Date: 30-12-2005
DOI: 10.1021/JP045975A
Abstract: It is demonstrated that de-gassed water is more effective at dispersing hydrophobic "dirt", such as liquid hydrocarbons or oils. This effect appears to be due to the reduction of natural cavitation, which would otherwise oppose the dispersion of hydrophobic liquid droplets into water. De-gassing of the oil enhances this effect still further, and this has led to a proposal for a novel cleaning process, based on using a combination of a de-gassed (hydrophobic) solvent followed by rinsing in de-gassed water. This method might be useful as an effective, detergent-free cleaning process. Also reported are some initial studies which suggest that the effect of "inert" dissolved gases on the electrical conductivity of water may need to be reconsidered.
Publisher: American Chemical Society (ACS)
Date: 23-08-2008
DOI: 10.1021/JP8037686
Publisher: Elsevier BV
Date: 02-2009
Publisher: Elsevier BV
Date: 09-2006
Publisher: Informa UK Limited
Date: 2011
Publisher: Elsevier BV
Date: 09-2020
Publisher: Elsevier BV
Date: 03-2008
Publisher: Elsevier BV
Date: 10-2008
Publisher: Elsevier BV
Date: 05-2016
Publisher: Elsevier BV
Date: 06-2005
Publisher: Elsevier BV
Date: 05-2019
Publisher: Informa UK Limited
Date: 12-2009
DOI: 10.5004/DWT.2009.917
Publisher: Elsevier BV
Date: 06-2005
Publisher: Informa UK Limited
Date: 12-2011
Publisher: American Society of Civil Engineers
Date: 31-07-2015
Publisher: The Institute of Brewing & Distilling
Date: 18-12-2021
DOI: 10.1002/JIB.633
Location: Australia
Location: No location found
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Mathew Francis.