A Novel Cyclic Catalytic Reformer for Hydrocarbon Fuels
NASA Phase I Contract NNC06CA53C
This proposed Small Business Innovative Research (SBIR) Phase I addresses development of a compact reformer system based on a cyclic partial oxidation (POx) technology for the purpose of generating hydrogen for fuel cell systems. The need for improved reformers arises from: 1) the tendency of hydrocarbon fuels to deposit carbon on surfaces; 2) requirement of large quantities of steam; 3) a massive and voluminous fuel desulfurization stage; 4) substantial size and power consumption requirements; and 5) the lack of efficient, robust, and compact hydrogen separation technology. These issues will be addressed by employment of a fixed bed cyclic redox system utilizing a metal oxide oxygen carrier for partial oxidation of fuel. The reformer will consist of a small heated bed of sulfur tolerant partial oxidation catalyst and will operate by alternate exposure to air and vaporized fuel. Carbon deposition and steam requirements and, possibly, the need for a prereformer will be reduced or eliminated by this cyclic mode. This cyclic operation will also eliminate the need for an expensive air separation unit or for H2/N2 separation. Phase I will consist of identification of catalysts, testing under cyclic conditions with real fuel, and integration of reformer and hydrogen separation modules. On the basis of Phase I data, a prototype system will be designed, fabricated, and tested during Phase II.
Potential NASA Application: If successful, the resulting device and technology would enable improvements in hydrocarbon reforming that would impact fuel cell applications and, in particular, fuel cell systems for zero emissions and high altitude long endurance remotely operated aircraft (HALE ROA) applications. An additional potential benefit is that partial oxidation as employed in the proposed Phase I may ultimately be able to replace the fuel desulfurizer, prereformer, and steam reformer in such systems with a single compact unit.
Potential Non-NASA Commercial Application: The technology discovered herein may serve to accelerate utilization of hydrogen as a practical fuel for civilian transportation and municipal power applications. For example, use in other mobile (e.g., automotive) applications can be envisioned. Additionally, the resulting technology will find use in combustion applications such as fuel fired heating systems. Stable, active and selective catalysts discovered under this contract will be immediately applicable toward development of a compact, economic fuel processor for reformation of logistic fuels into a high purity hydrogen gas stream suitable for introduction into the anode compartment of a hydrogen/air fuel cell.