Characterization of Heavy Petroleum Fractions by NMR Techniques

Characterization of Heavy Petroleum Fractions by NMR Techniques

Gasoline

Chromatography

Oil field equipment

Catalysts

Nuclear magnetic resonance spectroscopy

NMR spectroscopy continues to be a useful tool to characterize heavy petroleum fractions. Over the last few years, advancements in three techniques have opened new avenues to characterize heavy petroleum fractions and catalysts and dramatically improve our understanding of these important feedstocks: 1) incorporation of clay-gel adsorption chromatography for the separation of a heavy petroleum fraction into paraffin, aromatic, and polar fractions has enabled the extension of the Brown-Ladner method to narrower fractions

2) Diffusion Ordered Spectroscopy (DOSY) continues to be an attractive tool to characterize heavy petroleum fractions and asphaltenes due to dependence on molecular properties such as size, shape, mass, and charge which are not included in conventional spin interactions

3) availability of advanced instrumentation has enabled extending the application of Dynamic Nuclear Polarization (DNP) towards higher magnetic fields and has opened up new frontiers to characterize heterogeneous catalysts and heavy petroleum fractions. 2018 American Chemical Society.

73-86

1282

2018

Pradhan, Ajit

Ovalles, Cesar

Moir, Michael

conferencePaper

976156

10.1021/bk-2018-1282.ch004