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Martin, Stefan; Kraaij, Gerard; Ascher, Torsten; Baltzopoulou, Penelope; Karagiannakis, George; Wails, David; Wörner, Antje (2015)
Publisher: Elsevier
Journal: International Journal of Hydrogen Energy
Languages: German
Types: Article
Subjects: Thermische Prozesstechnik, Energy Engineering and Power Technology, Condensed Matter Physics, Renewable Energy, Sustainability and the Environment, Fuel Technology
Distributed hydrogen generation from liquid fuels has attracted increasing attention in the past years. Petroleum-derived fuels with already existing infrastructure benefit from high volumetric and gravimetric energy densities, making them an interesting option for cost competitive decentralized hydrogen production. In the present study, direct steam reforming of diesel and diesel blends (7 vol.% biodiesel) is investigated at various operating conditions using a proprietary precious metal catalyst. The experimental results show a detrimental effect of low catalyst inlet temperatures and high feed mass flow rates on catalyst activity. Moreover, tests with a desulfurized dieselebiodiesel blend indicate improved long term performance of the precious metal catalyst. By using deeply desulfurized diesel (1.6 ppmw sulfur), applying a high catalyst inlet temperature (>800 °C), a high steam-to-carbon ratio (S/C = 5) and a low feed mass flow per open area of catalyst (11 g/h cm2), a stable product gas composition close to chemical equilibrium was achieved over 100 h on stream. Catalyst deactivation was not observed.
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