In the catalytic partial oxidation of the c2 c6

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Unformatted text preview: atures could differ quite drastically. In the catalytic partial oxidation of the C2-C6 feedstock over Rh they observed that syngas was the main product regardless the C/O ratio whereas over Pt the selectivity was shifted to olefins with increasing C/O ratio. The Pd based catalyst deactivated rapidly due to coking even at low C/O ratios. They also found that the O2 conversion was always high if not complete in the conversion of C2-C4 alkanes over all the active catalysts. In the partial oxidation of C5 and C6 feedstock the O2 conversions were considerably lower, even at high C/O ratios O2 breakthrough was observed. The changes of the temperature and the alkane conversion as a function of the C/O ratio were presented only for Pt. The temperature and the alkane conversion decreased with increasing C/O ratio. 1.6. The scope of this work The aim of this work was to study the catalytic performance and the possibility of application of different Ni/Mg/Al catalysts derived from hydrotalcite-type precursors in the partial oxidation of C3H8 to CO and H2. The main focus of investigations was the influence of the catalyst composition on their activity, selectivity, stability and coking in relation to the Ni dispersion and the basicity. Dispersion and basicity are known to be the main factors influencing the catalytic performance of Ni containing catalysts in the related reactions (steam reforming, CO2 reforming, partial oxidation of CH4). The catalysts were further to be compared with a conventional steam reforming catalyst to scale their effectiveness. More detailed studies were devoted to the choice of optimum reaction conditions for the best catalyst. Further attention was also paid to the effect of 1. Introduction 46 ytrtrghrhrhhrhrhhffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff the calcination temperature on the catalyst’s performance. More detailed mechanistic studies were not planned as the partial oxidation of propane is expected to be more complex than the catalytic partial oxidation of methane, where the reaction...
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This document was uploaded on 10/07/2013.

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