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Recent Studies by R. Sandnes and Co-Authors Add New Data to Chemical Engineering Findings

February 5, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- Current study results on Chemical Engineering have been published. According to news reporting originating from Trondheim, Norway, by VerticalNews correspondents, research stated, "In earlier studies, several NMR procedures have been developed to follow the separation of water and oil. In particular, one of these procedures allows for determining the water content profile of the samples, i.e. the concentration of water as a function of the vertical position in the sample."

Our news editors obtained a quote from the research, "This method is capable of following the separation but has a detection limit close to 5 v/v% water content with the used settings. Since an oil is required to contain less than 0.5 v/v% water to be qualified as export quality, this detection limit of 5 v/v% is not sufficient for assessing whether an oil is dry or not. For this reason, the above-mentioned water content profile determination method and the CPMG sequence which only measures the average of the water content of the entire sample have been optimized specifically for determining low water contents. These methods have been tested using both model emulsions and petroleum crude oil emulsions in samples with or without free water. It is shown that the optimized NMR sequences are capable of measuring right low water contents. In one case, however, some discrepancy is found between results from NMR and Karl Fisher titrations. Possible explanations for this discrepancy are discussed."

According to the news editors, the research concluded: "The developed NMR techniques allows to determine low water contents in 6 to 14 min and have a detection limit between approximate to 0.3 and approximate to 0.5-1.0 v/v%, depending on the method used."

For more information on this research see: Optimization and validation of low field nuclear magnetic resonance sequences to determine low water contents and water profiles in W/O emulsions. Colloids and Surfaces A-Physicochemical and Engineering Aspects, 2014;441():441-448. Colloids and Surfaces A-Physicochemical and Engineering Aspects can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands.

The news editors report that additional information may be obtained by contacting R. Sandnes, Anvendt Teknol, N-7022 Trondheim, Norway. Additional authors for this research include S. Simon, J. Sjoblom and G.H. Sorland.

Keywords for this news article include: Norway, Europe, Trondheim, Chemical Engineering

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Source: Journal of Engineering


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