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| - Permeability, Selectivity, and Testing of Hydrogen DiffusionMembranes Suitable for Use in Steam Reforming
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| - Three composite hydrogen-permeable membranes were produced by the electroless depositionof palladium on macroporous Inconel. The permeability and selectivity for hydrogen to argonwas assessed over the range 750−850 °C using a 156-μm-thick membrane. The permeabilitycoefficient was 1.874 × 10-6 mol/(m s kPa0.5), with an activation energy of 22.6 kJ/mol. Membranesproduced by the electroless technique exhibited hydrogen/argon molar selectivities in the range(336−1187):1. Two membranes were used to assess the effect of hydrogen permeation on theconversion of methane over a 20 wt % Ni/α-alumina catalyst in a CREC riser simulator used tomodel a fast fluidized bed. Hydrogen permeation from the reactor produced conversions in excessof those attainable at equilibrium and favorably modified the composition of the synthesis gas.
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