Abstract
Steady-state and transient catalytic partial oxidation of hydrocarbons
(methane, butane, cyclohexane, n-hexane, isooctane, decane) has been
carried out on rhodium-coated alumina monoliths in an effort to determine
whether higher alkanes can be successfully converted to H2 and CO
in short contact time reactors. This process is also necessary to
determine the feasibility of on-board hydrogen generation for fuel
cell and internal combustion engine applications. Steady-state experiments
indicate that hydrocarbon feeds up to at least C10 can be efficiently
converted to high-concentration H2 (>70% selectivity) streams in
millisecond reactors using ceramic monoliths coated with rhodium
catalyst. Transient lightoff experiments indicate that millisecond
catalytic partial oxidation reactors can be taken from room temperature
to steady state temperature in less than 5 s by using homogeneous
combustion to rapidly heat the catalyst.
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