气候变化领域集成服务门户(CCPortal): High-capacity thermochemical CO2 dissociation using iron-poor ferrites

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DOI	10.1039/c9ee02795e
	High-capacity thermochemical CO2 dissociation using iron-poor ferrites
	Zhai S.; Rojas J.; Ahlborg N.; Lim K.; Cheng C.H.M.; Xie C.; Toney M.F.; Jung I.-H.; Chueh W.C.; Majumdar A.
发表日期	2020
ISSN	1754-5692
起始页码	592
结束页码	600
卷号	13 期号:2
英文摘要	Dissociation of CO2 to form CO can play a key role in decarbonizing our energy system. We report here a two-step thermochemical cycle using a variety of iron-poor (Fe-poor) ferrites (FeyM1-yOx where y < 2/3) that produce CO with unusually high yield using Fe as the redox active species. Conventional wisdom suggests that increasing the Fe fraction would increase the capacity for CO2 dissociation. Here, we report the opposite result: at partial pressure ratio CO : CO2 = 1 : 100, we demonstrated CO yields of 8.0 ± 1.0 mL-CO per gram from Fe0.35Ni0.65Ox, and 3.7 ± 1.0 mL-CO per gram from Fe0.45Co0.55Ox, at a thermal reduction temperature of 1300 °C; remarkably, these CO2 dissociation capacities are significantly higher than those of state-of-the-art materials such as spinel ferrites (Fe2MO4), (substituted) ceria, and Mn-based perovskite oxides. Optimization of the kinetics of Fe-poor ferrites with a ZrO2 support resulted in higher CO yields per gram of ferrite. The unexpected CO yield vs. Fe ratio trend is consistent with the prediction of calculated ternary phase diagrams, which suggest a swing between spinel and rocksalt phases. These Fe-poor ferrites open new opportunities for tuning the redox properties of oxygen exchange materials. © 2020 The Royal Society of Chemistry.
语种	英语
scopus关键词	Carbon dioxide; Cerium oxide; Dissociation; Ferrites; Nickel compounds; Perovskite; Redox reactions; Zirconia; Oxygen exchange; Partial pressure ratio; Perovskite oxides; Spinel ferrites; State of the art; Ternary phase diagrams; Thermal reduction; Thermochemical cycles; Iron; carbon dioxide; ferrite; optimization; partial pressure; reaction kinetics; redox conditions; thermochemistry
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162907
作者单位	Department of Mechanical Engineering, Stanford University, Stanford, CA 94305, United States; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, United States; Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States; Department of Physics, Harvard University, Cambridge, MA 02138, United States; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, United States; Department of Materials Science and Engineering, Seoul National University, Seoul, 08826, South Korea; Precourt Institute for Energy, Stanford University, Stanford, CA 94305, United States; Applied Energy Division, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States
推荐引用方式 GB/T 7714	Zhai S.,Rojas J.,Ahlborg N.,et al. High-capacity thermochemical CO2 dissociation using iron-poor ferrites[J],2020,13(2).
APA	Zhai S..,Rojas J..,Ahlborg N..,Lim K..,Cheng C.H.M..,...&Majumdar A..(2020).High-capacity thermochemical CO2 dissociation using iron-poor ferrites.Energy and Environmental Science,13(2).
MLA	Zhai S.,et al."High-capacity thermochemical CO2 dissociation using iron-poor ferrites".Energy and Environmental Science 13.2(2020).