Biogas reforming over BaTi1−xSnxO3-supported Ni-based catalysts recovered from spent Ni-metal-hydride batteries

Abstract BaTi 1−x Sn x O 3 -supported Ni-based catalysts recovered from spent Ni-metal-hydride (Ni-MH) batteries [ w Ni/BaTi 1−x Sn x O 3 (x = 0.0, 0.2, 0.4, 0.6, and 1.0)] were prepared. Their catalytic activities for model biogas reforming reactions were examined at 800 °C and compared with that of w Ni/γ-Al 2 O 3 . According to the results, w Ni/BaTi 0.8 Sn 0.2 O 3 exhibited high reforming performance and high sustainability among the catalysts tested. w Ni/γ-Al 2 O 3 exhibited unsustainability due to carbon deposition, although its performance was excellent for a short time. BaTi 0.8 Sn 0.2 O 3 functioned as an inhibitor, depressing carbon deposition. This function was likely due to the mobile oxide ions and alkaline earth oxides in the catalyst supports.