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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: https://www.mdpi.com/2073-4344/14/4/255   catalysts-14-00255.pdf (446,63 KB) MD5: 1401BA663CBA16D93E5F926E1DDB3CB9   catalysts-14-00255-s001.zip (597,77 KB) MD5: 23CEFF851C861E38B7831A14E6D2A573   This document has even more files. Complete list of files is available below. 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  COBISS.SI-ID: 193915395  UDC: 54 ISSN on article: 2073-4344 eISSN: 2073-4344 DOI: 10.3390/catal14040255  NUK URN: URN:SI:UNG:REP:3BJO3O2F Publication date in RUNG: 25.04.2024 Views: 206 Downloads: 4 Metadata:     Cite this work Plain text BibTeX EndNote XML EndNote/Refer RIS ABNT ACM Ref AMA APA Chicago 17th Author-Date Harvard IEEE ISO 690 MLA Vancouver : Copy citation

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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

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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