Premium
Insights into the Mechanisms of Isopropanol Conversion on γ‐Al 2 O 3 by Dielectric Barrier Discharge
Author(s) -
Rivallan Mickaël,
Fourré Elodie,
Aiello Sébastien,
Tatibouët JeanMichel,
ThibaultStarzyk Frédéric
Publication year - 2012
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201200021
Subject(s) - dielectric barrier discharge , catalysis , acetone , acetaldehyde , chemistry , condensation , plasma , oxide , dehydrogenation , fourier transform infrared spectroscopy , fragmentation (computing) , molecule , analytical chemistry (journal) , ozone , mesityl oxide , photochemistry , chemical engineering , organic chemistry , ethanol , physics , electrode , quantum mechanics , computer science , engineering , thermodynamics , operating system
Mechanisms of isopropanol (IPA) conversion on γ‐Al 2 O 3 by dielectric barrier discharge plasma are elucidated by the means of operando Fourier transformed infrared spectroscopy. In that case, it is shown that the IPA conversion proceeds by successive steps. Firstly, via the oxidation of IPA into acetone by atomic oxygen and ozone produced in the plasma composed of dry air. Secondly, after aldolization of acetone into mesityl oxide at the surface of the γ‐Al 2 O 3 catalyst. Thirdly, after fragmentation of mesityl oxide into acetaldehyde and isobutene. Such cascade reactions are only possible when a catalyst is placed in the discharge zone (in‐plasma catalysis). It initially supports the IPA molecules and then allows products condensation before their fragmentation.