Feng Xiaoqian, Zhao Yilin, Zhao Yonghua, Wang Huan, Liu Huimin, Zhang Qijian
School of Chemical and Environmental Engineering, Liaoning University of Technology Jinzhou 121001 China
RSC Adv. 2023 Aug 10;13(34):23991-24002. doi: 10.1039/d3ra02769d. eCollection 2023 Aug 4.
H is one of the promising renewable energy sources, but its production and transportation remain challenging. Distributed H production using liquid H carriers is one of the ideal ways of H utilization. Among common H carriers, ethanol is promising as it has high H content and can be derived from renewable bio-energy sources such as sucrose, starch compounds, and cellulosic biomass. To generate H from ethanol, steam reforming of ethanol (SRE) is the most common way, while appropriate catalysts, usually supported metal catalysts, are indispensable. However, the SRE process is quite complicated and always accompanied by various undesirable by-products, causing low H yield. Moreover, the catalysts for SRE are easy to deactivate due to sintering and carbon deposition under high reaction temperatures. In recent years, lots of efforts have been made to reveal SRE mechanisms and synthesize catalysts with high H yield and excellent stability. Both active metals and supports play an important role in the reaction. This mini-review summarizes the recent progress of SRE catalysts from the view of the impacts of active metals and supports and draws an outlook for future research directions.
氢能是一种很有前景的可再生能源之一，但其生产和运输仍然具有挑战性。使用液态氢载体进行分布式制氢是氢能利用的理想方式之一。在常见的氢载体中，乙醇很有前景，因为它含氢量高，并且可以从可再生生物能源中获得，如蔗糖、淀粉化合物和纤维素生物质。通过乙醇蒸汽重整（SRE）从乙醇中制氢是最常见的方法，而合适的催化剂，通常是负载型金属催化剂，是必不可少的。然而，SRE过程相当复杂，并且总是伴随着各种不良副产物，导致氢气产率较低。此外，用于SRE的催化剂在高反应温度下容易因烧结和积碳而失活。近年来，人们为揭示SRE机理和合成具有高氢气产率和优异稳定性的催化剂付出了很多努力。活性金属和载体在反应中都起着重要作用。本综述从活性金属和载体的影响角度总结了SRE催化剂的最新进展，并对未来的研究方向进行了展望。
