Wang Yuyi, Ye Quan, Xu Xinyu, Dhmees Abdelghaffar S, Cui Xuemin
Guangxi Key Lab of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Egyptian Petroleum Research Institute, Ahmed El-Zomor St., Nasr City, Cairo 11727, Egypt.
Molecules. 2023 Oct 13;28(20):7079. doi: 10.3390/molecules28207079.
In recent years, major economies have implemented carbon reduction and carbon neutrality policies. Furthermore, with advancements in science and technology, carbon dioxide (CO) is now considered a valuable raw material for producing carbon-based fuels through hydrogenation. Various concentrations of yttrium (referred to as Y hereafter) were introduced to assess their influence on the catalytic performance of CO methanation. At a temperature of 300 °C, the catalyst exhibited an impressive CO conversion rate of 78.4% and maintained remarkable stability throughout a rigorous 100 h stability assessment. The findings suggest that the inclusion of yttrium (Y) promotes the formation of oxygen vacancies and alkaline sites on the catalyst. This, in turn, enhances the reducibility of nickel species, improves the dispersion of nickel particles, and plays a pivotal role in enhancing thermal stability. Furthermore, it offers an innovative design approach for creating highly efficient composite CO methanation catalysts by controlling particle size and harnessing synergistic catalytic effects at the metal/support interface.
近年来，主要经济体已实施碳减排和碳中和政策。此外，随着科技的进步，二氧化碳（CO）现在被认为是通过氢化生产碳基燃料的宝贵原料。引入了各种浓度的钇（以下简称Y）以评估它们对CO甲烷化催化性能的影响。在300°C的温度下，该催化剂表现出令人印象深刻的78.4%的CO转化率，并且在严格的100小时稳定性评估中保持了显著的稳定性。研究结果表明，钇（Y）的加入促进了催化剂上氧空位和碱性位点的形成。这反过来又提高了镍物种的还原性，改善了镍颗粒的分散性，并在提高热稳定性方面发挥了关键作用。此外，它为通过控制粒径和利用金属/载体界面的协同催化效应来制备高效复合CO甲烷化催化剂提供了一种创新的设计方法。
