Journal Article

FZJ-2021-04150

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png The impact of water vapor on the OH reactivity toward CH 3 CHO at ultra-low temperatures (21.7–135.0 K): Experiments and theory

Neeman, E. M. ; González, D. ; Blázquez, S. ; Ballesteros, B. ; Canosa, A. ; Antiñolo, M. ; Vereecken, L. (Corresponding author)FZJ* ; Albaladejo, J. ; Jiménez, E. (Corresponding author)

2021
American Institute of Physics Melville, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/28935  doi:10.1063/5.0054859

Abstract: The role of water vapor (H2O) and its hydrogen-bonded complexes in the gas-phase reactivity of organic compounds with hydroxyl (OH) radicals has been the subject of many recent studies. Contradictory effects have been reported at temperatures between 200 and 400 K. For the OH + acetaldehyde reaction, a slight catalytic effect of H2O was previously reported at temperatures between 60 and 118 K. In this work, we used Laval nozzle expansions to reinvestigate the impact of H2O on the OH-reactivity with acetaldehyde between 21.7 and 135.0 K. The results of this comprehensive study demonstrate that water, instead, slows down the reaction by factors of ∼3 (21.7 K) and ∼2 (36.2–89.5 K), and almost no effect of added H2O was observed at 135.0 K

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Contributing Institute(s):

1. Troposphäre (IEK-8)

Research Program(s):

1. 2111 - Air Quality (POF4-211) (POF4-211)

Appears in the scientific report 2021

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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