Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5479903 | Journal of Cleaner Production | 2017 | 31 Pages |
Abstract
In this work, the Pt-Ni/CeO2-SiO2 catalyst was prepared by wet impregnation and tested for steam and oxidative steam reforming of ethanol at low-temperature (300-600 °C). The solids were characterized by X-ray fluorescence (XRF) and diffraction (XRD), nitrogen adsorption, Raman spectroscopy, temperature programmed reduction (TPR) and oxidation (TPO). Reforming tests were carried out between 10,000 and 30,000 hâ1, recording total conversion at T > 450 °C, independently from the contact time and the feed composition; in addition, hydrogen yield was marginally affected by O2 co-feeding, especially in the mild-temperature range. During stability tests, carried out at 500 °C and 20,000 hâ1 for at least 45 h, oxygen addition reduced carbon formation rate (CFR) of almost 30%, assuring a complete conversion for 55 h. Catalyst deposition on high surface area silica improved active species dispersion and metal-support interaction, preventing sintering phenomena and resulting in a much lesser coke selectivity than that observed for the silica-free sample.
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Authors
Vincenzo Palma, Concetta Ruocco, Eugenio Meloni, Antonio Ricca,