Abstract
In situ obtained Ni2P-based catalysts were proposed for the selective conversion of terephthalic acid into the benzene-toluene-xylene fraction. The catalysts were characterized by powder X-ray diffraction, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy and NH3 temperature-programmed desorption. The influence of reaction time, temperature and H2 pressure on the conversion of terephthalic acid and benzene-toluene-xylene selectivity was studied. Direct deoxygenation and decarboxylation were found to be the main reaction pathways using in situ Ni2P catalysts. Selectivity for the benzene-toluene-xylene fraction reached up to 100 % (at full terephthalic acid conversion) under moderate reaction conditions. The reusability of the in situ Ni2P catalyst before and after regeneration was demonstrated.
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