Water in oil emulsion droplet size characterization using a pulsed field gradient with diffusion editing (PFG-DE) NMR technique

Autor:	Clint P. Aichele, Walter G. Chapman, Tianmin Jiang, M. Flaum, George J. Hirasaki
Rok vydání:	2007
Předmět:	Chemistry Drop (liquid) Analytical chemistry Crude oil Water in oil emulsion Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Colloid and Surface Chemistry Brine Transverse relaxation Proton NMR Pulsed field gradient Droplet size
Zdroj:	Journal of Colloid and Interface Science. 315:607-619
ISSN:	0021-9797
DOI:	10.1016/j.jcis.2007.07.057
Popis:	This paper describes a proton nuclear magnetic resonance (NMR) technique, pulsed field gradient with diffusion editing (PFG-DE), to quantify drop size distributions of brine/crude oil emulsions. The drop size distributions obtained from this technique were compared to results from the traditional pulsed field gradient (PFG) technique. The PFG-DE technique provides both transverse relaxation (T2) and drop size distributions simultaneously. In addition, the PFG-DE technique does not assume a form of the drop size distribution. An algorithm for the selection of the optimal parameters to use in a PFG-DE measurement is described in this paper. The PFG-DE technique is shown to have the ability to resolve drop size distributions when the T2 distribution of the emulsified brine overlaps either the crude oil or the bulk brine T2 distribution. Finally, the PFG-DE technique is shown to have the ability to resolve a bimodal drop size distribution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8728a648a06eebf2f0a3685b186d685 https://doi.org/10.1016/j.jcis.2007.07.057 Zobrazit plný text záznamu Full Text from ScienceDirect