Abstract: Investigation of reaction mechanisms by identifying the intermediates released into the gas phase is most effective at low conversion of reactants, ideally approaching zero. However, conversions below 0.5–1% are rarely used, due to the difficulty of analysis of low-concentration products. The mechanism of the title reaction is a subject of long-term discussion. We studied the mechanism using an original ultralow conversion (ULC) method. The idea is to perform the analysis of products after their preliminary accumulation in a suitable absorbent at the reactor outlet. This allows decreasing conversion by 2–3 orders of magnitude. The ULC experiments were conducted with a Bi–Mo catalyst at 100–250 °C and with propene conversion down to 0.001%. A new so-called allyl hydroxylation mechanism was revealed. A key step is the hydroxylation of the CH3 group to form an allyl alcohol intermediate, which is further oxidized to acrolein. The mechanism explains all reaction features and was confirmed by experiments at 350 °C.

Cite: Panov G.I. , Parfenov M.V. , Starokon E.V. , Kharitonov A.S.
Investigation of Propene Oxidation to Acrolein by the Method of Ultralow Conversion: A New Mechanism of the Reaction
Journal of Catalysis. 2018. V.368. P.315-323. DOI: 10.1016/j.jcat.2018.09.033 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Jun 13, 2018
Accepted:	Sep 27, 2018
Published online:	Oct 31, 2018
Published print:	Dec 1, 2018

Identifiers:

Web of science:	WOS:000452582500031
Scopus:	2-s2.0-85055706724
Elibrary:	38637861
Chemical Abstracts:	2018:1995917
Chemical Abstracts (print):	169:539230
OpenAlex:	W2899060814

Citing:

DB	Citing
Scopus	7
Web of science	6
Elibrary	4
OpenAlex	8

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