Liquid fuel oxidation reaction activation energy

Gardner et al. reported that H2S catalytic partial oxidation technology with an AC catalyst is a promising method for the removal of H2S from fuel cell hydrocarbon feedstocks.206 Three different fuel cell feedstocks were considered for analysis sour natural gas, sour effluent from a liquid middle distillate fuel processor, and a Texaco 02-blown coal-derived synthesis gas. Their experimental results indicate that H2S concentration can be removed down to the part per million level in these plants. Additionally, a power-law rate expression was developed and reaction kinetics compared with prior literature. The activation energy for this reaction was determined to be 34.4 kJ/g mol with the reaction being first order in H2S and 0.3 order in 02. 

Borderline cases of spontaneous ignition are frequent and it should be kept in mind that probably no substance can unequivocally be called spontaneously ignitible in air. Three parameters must be taken into account temperature, air pressure, and dryness of the air. Even if spontaneous combustion occurs at extremely low ambient temperature, the reaction may be slow or uncertain enough to make it useless or impractical in a device such as a flame thrower. Experimental addition of the more active alkyls to liquid fuels and pairing the manageable ones with oxidizers as high-energy rocket fuels seem to be the only practical applications found for these metal alkyls. 

High electrochemical activity and contamination tolerance. An eleetroeatalyst should be of high intrinsic activity, to diminish electrochemical reaction polarization and enhance energy conversion effieiency. More specifieally, the anode catalyst should have the ability to resist detrimental by-products such as CO and other intermediates that poison the active reaction surface the cathode catalyst should have the ability to restrain crossover methanol oxidation when liquid methanol is seleeted as the fuel. 

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