No.39 ^1H-NMR Relaxation Study on The Dissociation Behavior of Asphaltene Aggregates.

Abstract

Dissociation behavior of Asphaltene aggregates in solvents has been investigated by means of ^1H-NMR relaxation measurement. Spin-spin relaxation time, T2, obtained with CPMG pulse sequence was employed to monitor the change in molecular mobility of asphaltenes induced by dissociation of aggregate structure. The dissociation behaviors for asphaltene aggregate structure were affected with the nature of solvent. The results obtained in this study indicate that the differences in dissociation behaviors of asphaltene aggregates in solvents can be evaluated with molecular mobility obtained from in-situ ^1H-NMR relaxation measurement.