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Non-exponential 1H and 2H NMR relaxation and self-diffusion in asphaltene-maltene solutions

posted on 2021-08-30, 10:45 authored by Kevin LindtKevin Lindt, Bulat Gizatullin, Carlos Mattea, Siegfried StapfSiegfried Stapf
This dataset contains data to obtain the NMR relaxation parameters T1 and T2, as well as the self-diffusion coefficients of different small molecules (maltenes) in a solvent in the absence and presence of a high asphaltene concentration.
Therefore, different maltenes were chosen (see README file) and solutions consisting of 95vol% solvent and 5vol% maltene were prepared (Pure). The solvents were benzene-d6 and benzene for proton-bearing maltenes and completely
deuterated maltenes, respectively. The relaxation parameters of the maltenes protons/deuterons were measured using the inversion recovery (T1) and the Carr-Purcell-Meiboom-Gill (T2) pulse sequence, while the stimulated echo pulse sequence was used to determine the self-diffusion coefficient. To determine further the parameters in presence of an asphaltene, the same solutions containing a high concentration of asphaltene (150g/l) were prepared (Slb). The experiments were conducted at room temperature (20 °C) at a magnetic field strength of 7.05T.
This dataset contains the raw and processed data of these experiments.


This research was funded in part by Deutsche Forschungsgemeinschaft (DFG) under project number STA 511/15-1 and 15-2.