In Situ Determination of Carbon Number Distributions of Mixtures of Linear Hydrocarbons Confined within Porous Media Using Pulsed Field Gradient NMR

Autor:	Lynn F. Gladden, Mick D. Mantle, Jack Williams, Qingyuan Zheng, Constant M. Guedon, T. A. Baart, Andrew J. Sederman
Rok vydání:	2020
Předmět:	In situ chemistry.chemical_classification Hydrocarbon mixtures chemistry.chemical_compound Hydrocarbon chemistry Calibration Analytical chemistry Heterogeneous catalysis Pulsed field gradient Mole fraction Porous medium Analytical Chemistry
Zdroj:	Analytical Chemistry. 92:5125-5133
ISSN:	1520-6882 0003-2700
DOI:	10.1021/acs.analchem.9b05600
Popis:	Pulsed field gradient (PFG) NMR measurements, combined with a novel optimization method, are used to determine the composition of hydrocarbon mixtures of linear alkanes (C7-C16) in both the bulk liquid state and when imbibed within a porous medium of mean pore diameter 28.6 nm. The method predicts the average carbon number of a given mixture to an accuracy of ±1 carbon number and the mole fraction of a mixture component to within an average root-mean-square error of ±0.036 with just three calibration mixtures. Given that the method can be applied at any conditions of temperature and pressure at which the PFG NMR measurements are made, the method has the potential for application in characterizing hydrocarbon liquid mixtures inside porous media and at the operating conditions relevant to, for example, hydrocarbon recovery and heterogeneous catalysis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2c1eecbb29ec39345bc82f80fc7f2d05 https://doi.org/10.1021/acs.analchem.9b05600 Zobrazit plný text záznamu