|
Title
|
|
|
|
Sustainable formation of tricarballylic acid from citric acid over highly stable Pd/Nb₂O₅.nH₂O catalysts
| |
|
Author
|
|
|
|
| |
|
Abstract
|
|
|
|
| Recently, a reaction sequence was developed for the production of tricarballylic acid, an interesting plasticiser precursor, from citric acid by using a H-Beta zeolite and Pd/C catalyst. Although yields of 85% of tricarballylic acid were obtained, citric acid elicited Al leaching from the zeolite framework, resulting in loss of activity. In this work, Nb2O5.nH2O was found to be a stable and performant catalyst for this reaction, and a strong involvement of the hydroxyl group of citric acid with the Nb2O5.nH2O surface was observed by 13C MAS NMR. Next, Pd/Nb2O5.nH2O catalysts were synthesized via a low temperature reduction method to preserve the acidity of the Nb2O5.nH2O support; the nature of the Pd phase was examined by XAS. In presence of a 0.6 wt% Pd/Nb2O5.nH2O catalyst, yields over 90% of tricarballylic acid were obtained over multiple runs. Finally, this catalyst was also suitable for the dehydration-hydrogenation of other monohydroxy carboxylic acids. |
| |
|
Language
|
|
|
|
English
| |
|
Source (journal)
|
|
|
|
Journal of catalysis. - San Diego, Calif., 1962, currens
| |
|
Publication
|
|
|
|
San Diego, Calif.
:
2022
| |
|
ISSN
|
|
|
|
0021-9517
[print]
1090-2694
[online]
| |
|
DOI
|
|
|
|
10.1016/J.JCAT.2022.02.013
| |
|
Volume/pages
|
|
|
|
408
(2022)
, p. 88-97
| |
|
ISI
|
|
|
|
000792492100009
| |
|
Full text (Publisher's DOI)
|
|
|
|
| |
|
Full text (open access)
|
|
|
|
| |
|
Full text (publisher's version - intranet only)
|
|
|
|
| |
|