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- W2997207887 abstract "The existing process for hydrogen production from methane through steam-reforming requires multiple reactors and separators and is thus costly and energy-intensive. This paper reports a new concept of CO2-permselective membrane reactor for promoting hydrogen production via steam reforming of methane (SRM) with CO2 capture. The membrane reactor is made of a ceramic-carbonate dual-phase membrane with a two-layered asymmetric wall structure. Bismuth-yttrium-samarium oxide (Bi1.5Y0.3Sm0.2O3-δ, BYS) was added to the support layer to make it non-wettable by molten carbonate, leaving the samarium-doped ceria (Sm0.2Ce0.8O2-δ, SDC) layer to form a thin (~150 μm) CO2-permselective SDC/molten-carbonate dual-phase layer after molten carbonate infiltration. The output product composition from the membrane reactor confirms that in situ CO2 removal effectively promotes water-gas shift conversion in SRM and thus enhances hydrogen yield. At 900 °C with feed pressure at 1 atm, the membrane reactor achieves 90% hydrogen yield with 84% CO2 recovery, which poses significant improvement when compared with conventional fixed-bed reactor under similar conditions. Analysis of CO2 permeation activation energy suggests that surface reaction rate might have an effect on CO2 permeation flux for the thin SDC/molten-carbonate membranes. Under atmospheric conditions the CO2 permeation with reactive feed for SRM is lower than with non-reactive feed due to lower driving force under reactive conditions in the feed." @default.
- W2997207887 created "2020-01-10" @default.
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- W2997207887 date "2020-03-01" @default.
- W2997207887 modified "2023-10-18" @default.
- W2997207887 title "Hydrogen production with carbon dioxide capture by dual-phase ceramic-carbonate membrane reactor via steam reforming of methane" @default.
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- W2997207887 doi "https://doi.org/10.1016/j.memsci.2019.117780" @default.
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