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Revealing the role of bromide in the H2O2 direct synthesis with the catalyst wet pretreatment method (CWPM)
Umeå University, Faculty of Science and Technology, Department of Chemistry. Åbo Akad Univ, Dept Chem Engn, Lab Ind Chem & React Engn, Johan Gadolin Proc Chem Ctr PCC, Biskopsgatan 8, FI-20500 Turku, Finland.
Umeå University, Faculty of Science and Technology, Department of Chemistry. Åbo Akad Univ, Dept Chem Engn, Lab Ind Chem & React Engn, Johan Gadolin Proc Chem Ctr PCC, Biskopsgatan 8, FI-20500 Turku, Finland.
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2017 (English)In: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 63, no 1, p. 32-42Article in journal (Refereed) Published
Abstract [en]

A tailor-made Pd0/K2621 catalyst was subjected to post synthesis modification via a wet treatment procedure. The aimwas the understanding of the role of promoters and how—if any—improvements could be qualitatively related to the cat-alyst performance for the H2O2direct synthesis. The Catalyst Wet Pretreatment Method was applied in different metha-nolic solutions containing H2O2, NaBr, and H3PO4, either as single modifiers or as a mixture. The catalyst wascharacterized by Transmission Electron Microscopy and X-ray Photoelectron Spectroscopy. It was concluded that themodified catalysts give rise to higher selectivities compared to the pristi ne reference catalyst thus opening a possibilityto exclude the addit ion of the undesirable selectivity enhancers in the reaction medium. This work provides original evi-dence on the role of promoter s, especially bromide, allowing the formulation of a new reaction mechanism for one ofthe most challenging reactions recognized by the world.

Place, publisher, year, edition, pages
American Institute of Chemical Engineers, 2017. Vol. 63, no 1, p. 32-42
Keywords [en]
palladium, H2O2, post modification synthesis, nanocluster reconstruction
National Category
Other Chemical Engineering
Identifiers
URN: urn:nbn:se:umu:diva-128833DOI: 10.1002/aic.15382ISI: 000390272500005OAI: oai:DiVA.org:umu-128833DiVA, id: diva2:1056860
Available from: 2016-12-15 Created: 2016-12-15 Last updated: 2018-06-09Bibliographically approved

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Mikkola, Jyri-PekkaShchukarev, Andrey

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