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Lookup NU author(s): Professor Paul Christensen,
Dr Michael Carroll
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2018.
For re-use rights please refer to the publisher's terms and conditions.
This paper reports in-situ Fourier Transform InfraRed (FTIR) spectroscopic studies on the non-thermal plasma reaction of isopropyl alcohol in dinitrogen at Macor (a ceramic containing oxides of Al, Mg and Si) and the analogous thermally-driven process. Whilst isopropyl alcohol did not react at the Macor at temperatures up to 600‹C, the study of the nonthermal plasma-driven process at the ceramic led to unexpected chemistry hitherto not observed, primarily the reaction of IPA in dinitrogen at short timescales to produce methane, HCN, acetone and “cold” CO at ca. 115K. The CO, methane and HCN rapidly established steady state concentrations, pointing to the need for faster FTIR studies: at longer times, isophorone and a polymethylacetylene-like” polymer were formed as a brown oil. The observation of the steadystate gases and brown oil suggested parallel pathways in the plasma, the latter taking place at the plasma/catalyst interface, and the former in the plasma remote from the catalyst. Replacing dinitrogen with argon completely inhibited or negated the production of the oil, had no effect upon the processes taking place in the plasma remote from the Macor and instead resulted in the production of acetylene.
Author(s): Christensen P, Mashhadani Z, MdAli AHB, Carroll M, Martin P
Publication type: Article
Publication status: Published
Journal: The Journal of Physical Chemistry
Print publication date: 03/05/2018
Online publication date: 17/04/2018
Acceptance date: 17/04/2018
Date deposited: 03/05/2018
ISSN (print): 1089-5639
ISSN (electronic): 1520-5215
Publisher: American Chemical Society
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