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Collateral hydrogenation over proton-conducting Ni/BaZr0.85Y0.15O3?δ catalysts for promoting CO2 methanation

机译:Ni / BaZr0.85Y0.15O3?δ质子传导催化剂上的侧链加氢促进CO2甲烷化

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Despite the importance of CO _(2) methanation for eco-friendly carbon-neutral fuel recycling, the current technologies, relying on catalytic hydrogenation over metal-based catalysts, face technological and economical limitations. Herein, we employ the steam hydrogenation capability of proton conductors to achieve collateral CO _(2) methanation over the Ni/BaZr _(0.85) Y _(0.15) O _(3? δ ) catalyst, which is shown to outperform its conventional Ni/Al _(2) O _(3) counterpart in terms of CH _(4) yield (8% higher) and long-term stability (3% higher for 150 h) at 400 °C while exhibiting a CH _(4) selectivity above 98%. Moreover, infrared and X-ray photoelectron spectroscopy analyses reveal the appearance of distinct mobile proton-related OH bands during the methanation reaction.
机译:尽管CO _(2)甲烷化对于生态友好的碳中性燃料回收非常重要,但目前依靠金属基催化剂进行催化加氢的技术仍面临技术和经济上的限制。本文中,我们利用质子导体的蒸汽加氢能力在Ni / BaZr _(0.85)Y _(0.15)O _(3?δ)催化剂上实现了CO _(2)的甲烷化甲烷化反应,其性能优于传统催化剂Ni / Al _(2)O _(3)对应物在400°C下的CH _(4)产率(高8%)和长期稳定性(150 h时高3%),同时表现出CH _( 4)选择性高于98%。此外,红外和X射线光电子能谱分析揭示了甲烷化反应过程中明显的与移动质子相关的OH带的出现。

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