气候变化领域集成服务门户(CCPortal): Solar thermochemical splitting of CO2 into separate streams of CO and O2 with high selectivity, stability, conversion, and efficiency

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DOI	10.1039/c6ee03776c
	Solar thermochemical splitting of CO2 into separate streams of CO and O2 with high selectivity, stability, conversion, and efficiency
	Marxer D.; Furler P.; Takacs M.; Steinfeld A.
发表日期	2017
ISSN	17545692
起始页码	1142
结束页码	1149
卷号	10 期号:5
英文摘要	Developing solar technologies for converting CO2 into fuels has become a great energy challenge, as it closes the anthropogenic carbon cycle and leads to the production of sustainable transportation fuels on a global scale. However, the low mass conversion, poor selectivity, and/or low energy efficiency of current approaches have hindered their industrial implementation. Here, we experimentally demonstrate the solar-driven thermochemical splitting of CO2 into separate streams of CO and O2 with 100% selectivity, 83% molar conversion, and 5.25% solar-to-fuel energy efficiency. This benchmark performance was accomplished using a 4 kW solar reactor featuring a reticulated porous structure, made of ceria, directly exposed to 3000× flux irradiation and undergoing redox cycling via temperature/pressure-swing operation. The dual-scale interconnected porosity (mm and μm-sized pores) of the ceria structure provided volumetric radiative absorption and enhanced heat/mass transport for rapid redox kinetics, while 500 consecutive redox cycles further validated material stability and structure robustness. A detailed energy balance elucidates viable paths for achieving higher efficiencies and for large-scale industrial implementation using an array of modular solar reactors integrated into the established solar concentrating infrastructure. © 2017 The Royal Society of Chemistry.
英文关键词	Benchmarking; Carbon; Carbon dioxide; Fuels; Porosity; Solar equipment; Transportation; Anthropogenic carbon; Higher efficiency; Industrial implementation; Interconnected porosity; Material stability; Porous structures; Radiative absorption; Sustainable transportation; Energy efficiency; absorption; benchmarking; carbon cycle; carbon dioxide; energy balance; energy efficiency; experimental study; model validation; performance assessment; reaction kinetics; separation; thermochemistry
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190560
作者单位	Department of Mechanical and Process Engineering, ETH Zurich, Zurich, 8092, Switzerland
推荐引用方式 GB/T 7714	Marxer D.,Furler P.,Takacs M.,et al. Solar thermochemical splitting of CO2 into separate streams of CO and O2 with high selectivity, stability, conversion, and efficiency[J],2017,10(5).
APA	Marxer D.,Furler P.,Takacs M.,&Steinfeld A..(2017).Solar thermochemical splitting of CO2 into separate streams of CO and O2 with high selectivity, stability, conversion, and efficiency.Energy & Environmental Science,10(5).
MLA	Marxer D.,et al."Solar thermochemical splitting of CO2 into separate streams of CO and O2 with high selectivity, stability, conversion, and efficiency".Energy & Environmental Science 10.5(2017).