Acknowledgments: · NASA Glenn Research Center (Grant #NNC04GB44G) · College of Engineering · Prof. Martin Abraham
NASA envisions employing fuel cells running on jet fuel reformate for its uninhabited aerial vehicles (UAVs), low emission alternative power (LEAP) missions and for transatlantic and intercontinental commercial flights. The
catalysts used for reforming gasoline and natural gas are severely poisoned by the sulfur present in jet (JP-8, Jet-A, etc.) fuels. If left uncaptured, it leads to the formation of H2S which is detrimental to the anode in the fuel cell
stack in addition to emitting unpleasant odor. The currently used catalysts deactivate quickly and/or are poisoned due to large sulfur contents in the simulated/surrogate fuels. Development of new sulfur-tolerant reforming
catalysts and robust desulfurizers is a critical path in the designing of jet fuel processors and their eventual utilization in powering NASA's research and commercial flights using solid oxide fuel cells.
·· Designing nanoscale ceria-based sulfur-tolerant reforming catalysts with low loading of the noble metals.
·· Designing sulfur sorbent with S-binding species localized in highly periodic nanopores.
·· Characterization with regard to crystallographic, morphological/ microstructural features and noble metal dispersion.
·· Evaluation with regard to sulfur capture, poisoning and regeneration behavior.
Novel SulfurNovel Sulfur--Tolerant Catalysts and Desulfurizers for Jet Fuel ReformingTolerant Catalysts and Desulfurizers for Jet Fuel Reforming
Martin DuranMartin Duran
Department of Chemical & Environmental EngineeringDepartment of Chemical & Environmental Engineering
Advisor: AbdulAdvisor: Abdul--Majeed AzadMajeed Azad
RESULTS AND DISCUSSIONRESULTS AND DISCUSSION
Catalyst 1S: as-prepared (a), after SR of toluene w/o sulfur (b)
and with 50 ppm sulfur (c); T = 825°C (bar: 5 nm).