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Natural gas is the fuel of choice for fuel cell applications due to its extensive existing supply infrastructure. However, the sulfur level in the natural gas needs to be reduced to less than 0.1 ppm for use in the fuel cells. TDA has developed SulfaTrap TM series of sorbents to effectively remove sulfur by adsorption from natural gas streams and has been carrying out field demonstrations with fuel cell developers for the past two years. In this paper we have compare the performance of the TDA's SulfaTrap sorbents with commercially available adsorbents.

The effective utilization of logistic fuels in fuel cell applications requires removal of refractory sulfur species (organosulfur compounds) to below 0.1 ppm. TDA has developed a sorbent-based fuel desulfurization system that can easily integrate with any fuel cell fuel processor. TDA's desulfurizer removes all of the refractory organic sulfur compounds from the military fuels (both JP-5 and JP-8), while it is still in the liquid phase and reduces the total fuel sulfur content to sub-ppm levels (e.g., less than 0.1 ppmw). TDA has built a 4-bed prototype jet fuel desulfurization system that could be integrated with a 1.5 kW fuel cell powered APU.

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