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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)
Files:URL https://www.mdpi.com/2073-4344/14/4/255
 
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Language:English
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
UDC:54
ISSN on article:2073-4344
eISSN:2073-4344
DOI:10.3390/catal14040255 New window
NUK URN:URN:SI:UNG:REP:3BJO3O2F
Publication date in RUNG:25.04.2024
Views:720
Downloads:4
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Record is a part of a journal

Title:Catalysts
Shortened title:Catalysts
Publisher:MDPI AG
ISSN:2073-4344
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

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
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

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