Estimation of Total Aromatics and Their Distribution as Mono and Global Di-Plus Aromatics in Diesel-Range Products by NMR Spectroscopy

In the present work, a new method based on 1H NMR spectroscopy has been developed for the estimation of total aromatics and their distribution as mono- and polynuclear (di-ring plus) aromatics in diesel-range fuel products. Multipulse NMR techniques such as, distortionless enhancement by polarizatio...

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Bibliographic Details
Published in:Energy & fuels 1998-11, Vol.12 (6), p.1223-1227
Main Authors: Bansal, V, Kapur, G. S, Sarpal, A. S, Kagdiyal, V, Jain, S. K, Srivastava, S. P, Bhatnagar, A. K
Format: Article
Language:English
Subjects:
Applied sciences
Crude oil, natural gas and petroleum products
Energy
Exact sciences and technology
Fuels
Petroleum products, gas and fuels. Motor fuels, lubricants and asphalts
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Summary:In the present work, a new method based on 1H NMR spectroscopy has been developed for the estimation of total aromatics and their distribution as mono- and polynuclear (di-ring plus) aromatics in diesel-range fuel products. Multipulse NMR techniques such as, distortionless enhancement by polarization transfer and 2-dimensional heteronuclear correlation have been applied for the unambiguous assignment of the 2.0−3.5 ppm region due to α-substituents on the aromatic ring in the 1H NMR spectra. The estimation of polynuclear aromatics is based on the estimation of bridgehead aromatic (Arb) and substituted aromatic (Arq) carbons using equations developed. The proposed 1H NMR-based method correlates very well with the standard IP-391/90- and mass-spectrometric-based method (R 2 = 0.99).
ISSN:0887-0624
1520-5029
DOI:10.1021/ef980052y