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Magnetic circular dichroism analysis of nitrogen contaminants in crude oil

✍ Scribed by J.A. Warner; B.R. Hollebone

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
689 KB
Volume
298
Category
Article
ISSN
0003-2670

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✦ Synopsis

Nitrogen pollution of air can occur from combustion of fossil fuels contaminated with fossilized nitrogen bearing organic molecules. Upgrading and refining processes have been designed to remove nitrogen but analytical monitoring feedstocks and products in real time is impractical with standard analytical techniques for nitrogen. In this study, magnetic circular dichroism (MCD) detection and quantitation of fossil porphyrins is shown to correlate well with total nitrogen in fractions representing over 80% of crude oil. Non-linear correlation in the heaviest fraction due to non-porphyrin neutral substances can be recognized and corrected. The resulting MCD procedure has the potential to become a fast on-site quality control system for upgrading crude oil.

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✍ Peter Kleindienst; Peter Belser; Georges H. Wagnière 📂 Article 📅 2003 🏛 John Wiley and Sons 🌐 German ⚖ 222 KB

## Abstract The long‐wavelength magnetic circular dichroism (MCD) spectra of some nitrogen‐containing heteroconjugated aromatic compounds have been recorded and interpreted on the basis of quantum‐chemical model calculations. In particular, the dependence of the MCD bands on the positions of the N‐