Effect of Rutile Content on the Catalytic Performance of Ru/TiO2 Catalyst for Low-Temperature CO2 Methanation,ACS Sustainable Chemistry & Engineering

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Effect of Rutile Content on the Catalytic Performance of Ru/TiO2 Catalyst for Low-Temperature CO2 Methanation
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2021-10-13 , DOI: 10.1021/acssuschemeng.1c05565
Zhiying Zhao ₁ , Qiaorong Jiang ₁ , Qiuxiang Wang ₂ , Mingzhi Wang ₁ , Jiachang Zuo ₁ , Hanming Chen ₁ , Qin Kuang ₁ , Zhaoxiong Xie _{1,

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Affiliation

Hydrogenation of carbon dioxide (CO₂) to methane (CH₄) bears the potential not only to alleviate excessive emission of CO₂ but to produce clean energy for direct use. However, due to the high temperature required for the activation of CO₂, it is necessary to develop a catalyst with high activity and high CH₄ selectivity at low reaction temperature for CO₂ methanation. In this study, we synthesized titanium dioxide (TiO₂) supports with different rutile contents by calcination and investigated the relationship between the rutile content of TiO₂ supports in Ru/TiO₂ catalysts and their performance for low-temperature CO₂ methanation. The characterization results indicated that Ru species grew preferentially on the rutile phase of the support TiO₂, and the interaction between Ru species and TiO₂ became stronger with increasing rutile content. In addition, the concentration of oxygen vacancies on the support, which would provide more adsorption sites for CO₂, increased with the decreasing rutile content. The best reactivity was achieved with a rutile content between 15% and 30%. This work included a thorough investigation on the effect of rutile content on the performance of low-temperature CO₂ methanation and provided guidance for the preparation of Ru/TiO₂ catalyst with high activity.

中文翻译：

金红石含量对Ru/TiO2催化剂低温CO2甲烷化催化性能的影响

二氧化碳 (CO ₂ )加氢生成甲烷 (CH ₄ ) 不仅可以缓解 CO _{2 的}过度排放，还可以生产可直接使用的清洁能源。然而，由于CO ₂活化需要高温，因此需要开发一种在低反应温度下具有高活性和高CH ₄选择性的催化剂用于CO ₂甲烷化。在本研究中，我们通过煅烧合成了不同金红石含量的二氧化钛 (TiO ₂ ) 载体，并研究了Ru/TiO ₂中 TiO ₂载体的金红石含量之间的关系低温CO ₂甲烷化的催化剂及其性能。表征结果表明，Ru物种优先在载体TiO ₂的金红石相上生长，并且随着金红石含量的增加，Ru物种与TiO ₂之间的相互作用增强。此外，载体上的氧空位浓度会随着金红石含量的降低而增加，这将为 CO ₂提供更多的吸附位点。金红石含量在 15% 到 30% 之间时反应性最佳。这项工作包括深入研究金红石含量对低温 CO ₂甲烷化性能的影响，并为 Ru/TiO ₂的制备提供指导。高活性的催化剂。

更新日期：2021-10-25

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