University of Oulu

Biasi, P. , Mikkola, J. ‐., Sterchele, S. , Salmi, T. , Gemo, N. , Shchukarev, A. , Centomo, P. , Zecca, M. , Canu, P. , Rautio, A. ‐. and Kordàs, K. (2017), Revealing the role of bromide in the H2O2 direct synthesis with the catalyst wet pretreatment method (CWPM). AIChE J., 63: 32-42. doi:10.1002/aic.15382

Revealing the role of bromide in the H₂O₂ direct synthesis with the catalyst wet pretreatment method (CWPM)

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Author: Biasi, P.1,2; Mikkola, J. -P.1,2; Sterchele, S.1;
Organizations: 1Dept. of Chemical Engineering, Laboratory of Industrial Chemistry and Reaction Engineering, Johan Gadolin Process Chemistry Centre (PCC), Åbo Akademi University, Biskopsgatan 8, FI-20500 Åbo-Turku, Finland
2Dept. of Chemistry, Technical Chemistry, Chemical-Biochemical Centre (KBC), Umeå University, Umeå SE-90187, Sweden
3Dipartimento di Ingegneria Industriale, Università degli Studi di Padova, via Marzolo 9, I-35131 Padova, Italy
4Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 8, I-35131 Padova, Italy
5Dept. of Electrical Engineering, Faculty of Information Technology and Electrical Engineering, Microelectronics and Materials Physics Laboratories, EMPART Research Group of Infotech Oulu, University of Oulu FI-90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 2.9 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2019052116255
Language: English
Published: John Wiley & Sons, 2017
Publish Date: 2019-05-21
Description:

Abstract

A tailor‐made Pd⁰/K2621 catalyst was subjected to post synthesis modification via a wet treatment procedure. The aim was the understanding of the role of promoters and how—if any—improvements could be qualitatively related to the catalyst performance for the H₂O₂ direct synthesis. The Catalyst Wet Pretreatment Method was applied in different methanolic solutions containing H₂O₂, NaBr, and H₃PO₄, either as single modifiers or as a mixture. The catalyst was characterized by Transmission Electron Microscopy and X‐ray Photoelectron Spectroscopy. It was concluded that the modified catalysts give rise to higher selectivities compared to the pristine reference catalyst thus opening a possibility to exclude the addition of the undesirable selectivity enhancers in the reaction medium. This work provides original evidence on the role of promoters, especially bromide, allowing the formulation of a new reaction mechanism for one of the most challenging reactions recognized by the world. © 2016 American Institute of Chemical Engineers AIChE J, 63: 32–42, 2017.

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Series: AIChE journal
ISSN: 0001-1541
ISSN-E: 1547-5905
ISSN-L: 0001-1541
Volume: 63
Issue: 1
Pages: 32 - 42
DOI: 10.1002/aic.15382
OADOI: https://oadoi.org/10.1002/aic.15382
Type of Publication: A1 Journal article – refereed
Field of Science: 116 Chemical sciences
215 Chemical engineering
Subjects:
Funding: N. Gemo and S. Sterchele gratefully acknowledge the Johan Gadolin Scholarship for financial support. P. Biasi gratefully acknowledges the Kempe Foundations for financial support. In Sweden, also the Bio4Energy programme is acknowledged.
Copyright information: © 2016 American Institute of Chemical Engineers. This is the peer reviewed version of the following article: Biasi, P. , Mikkola, J. ‐., Sterchele, S. , Salmi, T. , Gemo, N. , Shchukarev, A. , Centomo, P. , Zecca, M. , Canu, P. , Rautio, A. ‐. and Kordàs, K. (2017), Revealing the role of bromide in the H2O2 direct synthesis with the catalyst wet pretreatment method (CWPM). AIChE J., 63: 32-42. doi:10.1002/aic.15382, which has been published in final form at https://doi.org/10.1002/aic.15382. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.