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Title:Synthesis of helional by hydrodechlorination reaction in the presence of mono- and bimetallic catalysts supported on alumina
Authors:ID Piccolo, Oreste (Author)
ID Arčon, Iztok (Author)
ID Gangadhar, Das (Author)
ID Aquilanti, Giuliana (Author)
ID Prai, Andrea (Author)
ID Paganelli, Stefano (Author)
ID Facchin, Manuela (Author)
ID Beghetto, Valentina (Author)
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Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Hydrodechlorination reaction of 3-(benzo-1,3-dioxol-5-yl)-3-chloro-2-methylacrylaldehyde in the presence of different low metal content heterogeneous mono- or bimetallic catalysts was tested for the synthesis of the fragrance Helional® (3-[3,4-methylendioxyphenyl]-2-methyl-propionaldehyde). In particular, mono Pd/Al2O3, Rh/Al2O3 or bimetallic Pd-Cu/Al2O3, Rh-Cu/Al2O3 catalysts were tested in different reaction conditions from which it emerged that mono-Rh/Al2O3 was the best performing catalyst, allowing achievement of 100% substrate conversion and 99% selectivity towards Helional® in 24 h at 80 °C, p(H2) 1.0 MPa in the presence of a base. To establish correlations between atomic structure and catalytic activity, catalysts were characterized by Cu, Rh and Pd K-edge XANES, EXAFS analysis. These characterizations allowed verification that the formation of Pd-Cu alloys and the presence of Cu oxide/hydroxide species on the surface of the Al2O3 support are responsible for the very low catalytic efficiency of bimetallic species tested.
Keywords:selective hydrodechlorination, heterogeneous catalysis, XANES analysis, EXAFS analysis
Publication date:01.04.2024
Year of publishing:2024
Number of pages:str. 1-11
Numbering:Vol. 14, issue 4, [article no.] 255
PID:20.500.12556/RUNG-8999 New window
COBISS.SI-ID:193915395 New window
ISSN on article:2073-4344
DOI:10.3390/catal14040255 New window
Publication date in RUNG:25.04.2024
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Record is a part of a journal

Shortened title:Catalysts
Publisher:MDPI AG
COBISS.SI-ID:519958297 New window

Document is financed by a project

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:P1-0112
Name:Raziskave atomov, molekul in struktur s fotoni in delci


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:12.04.2024