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

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In Situ Determination of Carbon Number Distributions of Mixtures of Linear Hydrocarbons Confined within Porous Media Using Pulsed Field Gradient NMR
Analytical Chemistry ( IF 6.7 ) Pub Date : 2020-03-25 , DOI: 10.1021/acs.analchem.9b05600
Jack Williams ₁ , Qingyuan Zheng ₁ , Andrew J. Sederman ₁ , Mick D. Mantle ₁ , Timothy Baart ₂ , Constant Guédon ₂ , Lynn F. Gladden ₁

Affiliation

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.

中文翻译：

利用脉冲场梯度NMR原位测定限制在多孔介质中的线性烃混合物的碳数分布

脉冲场梯度（PFG）NMR测量与一种新颖的优化方法相结合，可用于确定在整体液态和吸收在平均孔径的多孔介质中的直链烷烃（C7–C16）烃混合物的组成28.6海里该方法仅使用三种校准混合物，即可预测给定混合物的平均碳原子数，精确度为±1碳原子数，并且混合物成分的摩尔分数在平均均方根误差的基础上，达到±0.036。假定该方法可在进行PFG NMR测量的任何温度和压力条件下应用，则该方法具有用于表征多孔介质内部的烃类液体混合物以及与例如以下条件相关的操作条件的潜力

更新日期：2020-03-26

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