Direct and Real-Time Analysis in a Plasma Reactor Using a Compact FT-ICR MS: Degradation of Acetone in Nitrogen and Byproduct Formation

Journal of the American Society for Mass Spectrometry
Sébastien ThomasEssyllt Louarn

Abstract

Methods for reduction of volatile organic compounds (VOCs) content in air depend on the application considered. For low concentration and low flux, nonthermal plasma methods are often considered as efficient. However, the complex chemistry involved is still not well understood because there is a lack of data sets of byproducts formation. To overcome this issue, rapid analytical methods are needed. We present the coupling of a rapid chemical ionization mass spectrometer (CIMS) for the real-time analysis of the VOCs formed during a degradation experiment. The high-resolution instrument used allows for chemical ionization and direct quantification of nontargeted compounds. This method is successfully applied to degradation experiments of acetone in a phototriggered nitrogen plasma discharge. Two regimes were highlighted: efficient conversion at low concentrations (<100 ppm) and moderate efficiency conversion at higher concentrations (>100 ppm). Those two regimes were clearly delimited as the sum of two exponential curves occurring at respectively low and high concentrations. Many byproducts were detected; in particular, HCN presented a significantly high yield. Nitrile compounds (acetonitrile, propionitrile, ...) are formed as wel...Continue Reading

References

Apr 23, 2004·European Journal of Mass Spectrometry·G MauclaireM Heninger
Feb 14, 2009·Chemical Reviews·Robert S BlakeAndrew M Ellis
Sep 20, 2011·Journal of Hazardous Materials·Arne M VandenbrouckeChristophe Leys
Jun 10, 2014·Environmental Health Perspectives·Ghassan B HamraDana Loomis
May 8, 2015·Chemical Reviews·Sally E PusedeRonald C Cohen
Dec 23, 2017·Journal of Mass Spectrometry : JMS·Clotilde Le VotEssyllt Louarn

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