Effect of Support Functionalization on Catalytic Direct Hydrogenation and Catalytic Transfer Hydrogenation of Muconic Acid to Adipic Acid

The liquid-phase hydrogenation of muconic acid (MA) to produce bio-adipic acid (AdA) is a prominent environmentally friendly chemical process, that can be achieved through two distinct methodologies: catalytic direct hydrogenation using molecular hydrogen (H2), or catalytic transfer hydrogenation ut...

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Bibliographic Details
Published in:Catalysts 2024-07, Vol.14 (7), p.465
Main Authors: Zanella, Elisa, Franchi, Stefano, Jabbarli, Narmin, Barlocco, Ilaria, Stucchi, Marta, Pirola, Carlo
Format: Article
Language:English
Subjects:
Acids
Adipic acid
bio-adipic acid
Carbon dioxide
Carbon fibers
Catalysts
Catalytic activity
catalytic transfer hydrogenation (CTH)
Decomposition
Effectiveness
Formic acid
Gases
Heat treatment
High temperature
Hydrogen
hydrogen donor
Hydrogenation
Liquid phases
Metals
muconic acid
Nanoparticles
Nylon
Organic acids
Oxidoreductases
Palladium
Palladium catalysts
Spectrum analysis
Stability
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Summary:The liquid-phase hydrogenation of muconic acid (MA) to produce bio-adipic acid (AdA) is a prominent environmentally friendly chemical process, that can be achieved through two distinct methodologies: catalytic direct hydrogenation using molecular hydrogen (H2), or catalytic transfer hydrogenation utilizing a hydrogen donor. In this study, both approaches were explored, with formic acid (FA) selected as the hydrogen source for the latter method. Palladium-based catalysts were chosen for these processes. Metal’s nanoparticles (NPs) were supported on high-temperature heat-treated carbon nanofibers (HHT-CNFs) due to their known ability to enhance the stability of this metal catalyst. To assess the impact of support functionalization on catalyst stability, the HHT-CNFs were further functionalized with phosphorus and oxygen to obtain HHT-P and HHT-O, respectively. In the hydrogenation reaction, catalysts supported on functionalized supports exhibited higher catalytic activity and stability compared to Pd/HHT, reaching an AdA yield of about 80% in less than 2 h in batch reactor. The hydrogen-transfer process also yielded promising results, particularly with the 1%Pd/HHT-P catalyst. This work highlights the efficacy of support functionalization in improving catalyst performance, particularly when formic acid is used as a safer and more cost-effective hydrogen donor in the hydrogen-transfer process.
ISSN:2073-4344
2073-4344
DOI:10.3390/catal14070465