| Title: | Direct and Real-Time Analysis in a Plasma Reactor Using a Compact FT-ICR MS: Degradation of Acetone in Nitrogen and Byproduct Formation |
| Author(s): | Thomas S; Blin-Simiand N; Heninger M; Jeanney P; Lemaire J; Magne L; Mestdagh H; Pasquiers S; Louarn E; |
| Address: | "Universite Paris-Saclay, CNRS, Institut de Chimie Physique, 91405 Orsay, France. Universite Paris-Saclay, CNRS, Laboratoire de Physique des Gaz et des Plasmas, 91405 Orsay, France. AlyXan, 91260 Juvisy-sur-Orge, France" |
| ISSN/ISBN: | 1879-1123 (Electronic) 1044-0305 (Linking) |
| 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 well. To a lower extent, ketene, acetaldehyde, and formaldehyde are observed. The association of the high-resolution mass spectrometer to the plasma reactor will allow further insights into the plasma chemistry and comparison to modelization" |
| Notes: | "PubMed-not-MEDLINEThomas, Sebastien Blin-Simiand, Nicole Heninger, Michel Jeanney, Pascal Lemaire, Joel Magne, Lionel Mestdagh, Helene Pasquiers, Stephane Louarn, Essyllt eng 2020/06/11 J Am Soc Mass Spectrom. 2020 Jul 1; 31(7):1579-1586. doi: 10.1021/jasms.0c00141. Epub 2020 Jun 23" |
