An innovative strategy for one-step CO-free H2 production from biogas was proposed.
The Ce0.8Sm0.15Ni0.05O2-δ catalytic layer was compatible with the ceramic membrane.
An accumulative production rate of 10.35 mL min-1 cm-2 of CO-free H2 was achieved.
A remarkably high hydrogen yield of 94.5% was achieved.
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| Liu M., Hu T., Zhang Y., et al. (2025). Innovative biogas reforming in catalytic membrane reactor for CO-free green hydrogen production with carbon capture. The Innovation Energy 2:100119. https://doi.org/10.59717/j.xinn-energy.2025.100119 |
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Schematic diagram of CO-free green hydrogen production with carbon capture in a membrane reactor by coupling water splitting with biogas reforming.
(A&B) The cross section SEM images of the CSO-Ni@CSO-SSTF catalytic membrane. (C) XRD patterns of the CSO-Ni catalyst before and after reduction pretreatment. (D) HAADF-STEM image and corresponding elemental mappings and (E) HR-TEM image of CSO-Ni after 20% H2 reduction at 800 oC for 2h. XPS spectra of the fresh and the reduced CSO-Ni catalyst. (F) Ni 2p3/2, (G) Ce 3d. (H) H2-TPR profiles of CSO-Ni catalyst and CSO support.
(A) Effects of CH4 concentration in CSO-Ni@CSO-SSTF reactor. (B) The contribution of POM and DRM to methane conversion (XCH4) in (A) calculated based on the CO2 conversion. (C) CH4-TPSR profiles of CSO-Ni catalyst. (D) The accumulative production rate of CO-free green hydrogen and accumulative selectivity of CO2 in a CSO-Ni@CSO-SSAF reactor.
Long-term stability of the CSO-Ni@CSO-SSTF or the Ni/Al2O3@CSO-SSTF by coupling water splitting with biogas reforming at 930 oC. Shell side: 1.25 mL min−1 CO2, 2.5 mL min−1 CH4 and 16.25 mL min−1 N2; Core side: 20 mL min−1 H2O and 10 mL min−1 He.
(A) The O2-TPO profiles of the spent CSO-Ni and Ni/Al2O3 catalysts after long-term stability tests. (B) XRD patterns of the outer surface of fresh and spent membranes. SEM images of the surface of the spent membranes in contact with (C) Ni/Al2O3 and (D) CSO-Ni catalysts.