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Revealing the role of bromide in the H2O2 direct synthesis with the catalyst wet pretreatment method (CWPM)
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. Åbo Akad Univ, Dept Chem Engn, Lab Ind Chem & React Engn, Johan Gadolin Proc Chem Ctr PCC, Biskopsgatan 8, FI-20500 Turku, Finland.
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen. Åbo Akad Univ, Dept Chem Engn, Lab Ind Chem & React Engn, Johan Gadolin Proc Chem Ctr PCC, Biskopsgatan 8, FI-20500 Turku, Finland.
Vise andre og tillknytning
2017 (engelsk)Inngår i: AIChE Journal, ISSN 0001-1541, E-ISSN 1547-5905, Vol. 63, nr 1, s. 32-42Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
American Institute of Chemical Engineers, 2017. Vol. 63, nr 1, s. 32-42
Emneord [en]
palladium, H2O2, post modification synthesis, nanocluster reconstruction
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-128833DOI: 10.1002/aic.15382ISI: 000390272500005OAI: oai:DiVA.org:umu-128833DiVA, id: diva2:1056860
Prosjekter
Bio4EnergyTilgjengelig fra: 2016-12-15 Laget: 2016-12-15 Sist oppdatert: 2019-08-30bibliografisk kontrollert

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