Abstract

Jet-fuel surrogates with varying composition and sulfur content were partially oxidized over a Rh/Al2O3 honeycomb catalyst. The surrogates consisted of a blend of n-dodecane, 1,2,4-trimethylbenzene, and benzothiophene to represent model mixtures of the main chemical properties of jet fuels. The experiments were performed under quasi-autothermal conditions for three different C/O-ratios in a set-up, specifically designed for fuels with high boiling points. The product distribution significantly changes with sulfur addition showing increased water formation, undesired by-products and a decline in fuel conversion. A steady increase of by-product formation over time on stream leads to coke deposition for fuels with ≥50 mg S per kg fuel. The interplay between sulfur and coke, caused deactivation and its impact on syngas selectivity, fuel conversion, and by-product formation is discussed.

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