Zhao Xianhui, Joseph Babu, Kuhn John, Ozcan Soydan
Department of Chemical & Biomedical Engineering, University of South Florida, Tampa, FL 33620, USA; Chemical Sciences Division, Oak Ridge National Laboratory, 1 Bethel Valley Road, Oak Ridge, TN 37831, USA.
Department of Chemical & Biomedical Engineering, University of South Florida, Tampa, FL 33620, USA.
iScience. 2020 May 22;23(5):101082. doi: 10.1016/j.isci.2020.101082. Epub 2020 Apr 21.
Interest in novel uses of biogas has increased recently due to concerns about climate change and greater emphasis on renewable energy sources. Although biogas is frequently used in low-value applications such as heating and fuel in engines or even just flared, reforming is an emerging strategy for converting biogas to syngas, which could then be used to obtain high-value-added liquid fuels and chemicals. Interest also exists due to the role of dry, bi-, and tri-reforming in the capture and utilization of CO. New research efforts have explored efficient and effective reforming catalysts, as specifically applied to biogas. In this paper, we review recent developments in dry, bi-, and tri-reforming, where the CO in biogas is used as an oxidant/partial oxidant. The synthesis, characterization, lifetime, deactivation, and regeneration of candidate reforming catalysts are discussed in detail. The thermodynamic limitation and techno-economics of biogas conversion are also discussed.
由于对气候变化的担忧以及对可再生能源的更高度重视，近来对沼气新用途的兴趣有所增加。尽管沼气经常用于低价值应用，如供暖、发动机燃料，甚至只是被燃烧放空，但重整是一种将沼气转化为合成气的新兴策略，合成气随后可用于获取高附加值液体燃料和化学品。由于干重整、双重整和三重整在一氧化碳捕获与利用方面的作用，人们也对此产生了兴趣。新的研究工作已探索了专门应用于沼气的高效重整催化剂。在本文中，我们综述了干重整、双重整和三重整的最新进展，其中沼气中的一氧化碳用作氧化剂/部分氧化剂。详细讨论了候选重整催化剂的合成、表征、寿命、失活和再生。还讨论了沼气转化的热力学限制和技术经济情况。
