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Tibo De Saegher ; Boyana Atanasova ; Pieter Vermeir , et al. RSC Sustain.,2024,2,1551-1567. DOI: 10.1039/D4SU00054D
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Abstract: Research towards mild reductive depolymerization of lignin is gaining momentum because of its potential for producing sustainable functionalized aromatics, but achieving high yields still relies on expensive noble metal catalysts. This study aims to improve the catalysts' cost effectiveness through addition of a non-noble metal to a Pd nanoparticle catalyst, supported on γ-Al2O3. Six Pd based catalysts (Pd, PdCu, PdNi, PdFe, PdCo, and PdMo) were synthesized and prepared through either calcination or thermal reduction, and their activity and selectivity in lignin depolymerization were evaluated as a function of batch time. Principal component analysis (PCA) of the entire datapool revealed that, albeit to varying degrees, the addition of a secondary metal shifts the behavior of a Pd catalyst more towards that of pure solvolysis and that the preparation strategy has no effect on Pd and PdMo. Regarding activity, it was found that the addition of Cu, Ni, Fe, Co and Mo significantly enhances the catalyst's activity and that the preparation strategy is also important, with calcination being preferred for PdCu and PdFe and thermal reduction for PdNi and PdCo. Using a plethora of analysis techniques to assess the selectivity at increasing depths, it was revealed that the shift in selectivity, as identified in the PCA results, is caused by variations in dehydration of aliphatic OH groups and hydrogenation of aliphatic double bonds. Moreover, due to a size exclusion effect during the reaction, differences in selectivity between the catalysts are most pronounced at lower molecular weights.
Purchased from AmBeed: 2305-13-7
CAS No. : | 2305-13-7 | MDL No. : | MFCD00016571 |
Formula : | C10H14O3 | Boiling Point : | - |
Linear Structure Formula : | C6H5C2H2CH2OHO2CH4 | InChI Key : | MWOMNLDJNQWJMK-UHFFFAOYSA-N |
M.W : | 182.22 | Pubchem ID : | 16822 |
Synonyms : |
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Chemical Name : | 4-(3-Hydroxypropyl)-2-methoxyphenol |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.