Determination of the Average Aromatic Cluster Size of Fossil Fuels by Solid-State NMR at High Magnetic Field

TitleDetermination of the Average Aromatic Cluster Size of Fossil Fuels by Solid-State NMR at High Magnetic Field
Publication TypeJournal Article
Year of Publication2013
AuthorsMao KM, Kennedy GJ, Althaus SM, Pruski M
Journal TitleEnergy & Fuels
Volume27
Pages760-763
Date Published02
Type of ArticleArticle
ISBN Number0887-0624
Accession NumberWOS:000315431900018
Keywordsanthracite, argonne premium coals, c-13 nmr, cross, H-1, MAS, polarization, resolution, resonance spectrometry, spectroscopy
Abstract

We show that the average aromatic cluster size in complex carbonaceous materials can be accurately determined using fast magic-angle spinning (MAS) NMR at a high magnetic field. To accurately quantify the nonprotonated aromatic carbon, we edited the C-13 spectra using the recently reported MAS-synchronized spin echo, which alleviated the problem of rotational recoupling of H-1-C-13 dipolar interactions associated with traditional dipolar dephasing experiments. The dependability of this approach was demonstrated on selected Argonne Premium coal standards, for which full sets of basic structural parameters were determined with high accuracy.

URL<Go to ISI>://WOS:000315431900018
DOI10.1021/ef301804p