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DOI	10.1039/c7ee03301j
	Calcium cobaltate: A phase-change catalyst for stable hydrogen production from bio-glycerol
	Dang C.; Li Y.; Yusuf S.M.; Cao Y.; Wang H.; Yu H.; Peng F.; Li F.
发表日期	2018
ISSN	17545692
起始页码	660
结束页码	668
卷号	11 期号:3
英文摘要	The sorption enhanced steam reforming (SESR) technology has the potential to produce high purity hydrogen by Le Chatelier's principle. However, its practical applicability is limited by sorbent sintering and deactivation at high reaction/decarbonation temperatures. Herein, we propose a novel strategy to enhance the stability of the SESR of glycerol (SESRG), in which misfit layered materials, i.e. calcium cobaltates (CCO), were used as a dual-functional material combining CO2 absorption and catalytic reforming. Differing from the conventional approach of enhancing the robustness of catalysts/sorbents, we exploited the reversible phase change of CCO: Ca3Co4O9 ↔ Co + CaO, during the decarbonation and reaction steps respectively. By doing so, the sintering of the CaO sorbent and the Co catalyst could be suppressed because they were homogenized into CCO on an atomic level in every decarbonation stage. The CCO catalyst displayed a very stable performance for producing high purity H2 through SESRG for up to 120 reaction-decarbonation cycles, without noticeable changes in H2 production and CO2 absorption capacity. In situ XRD and microscopy studies demonstrated the reversible phase transition and the accompanied formation of hierarchical CCO micro-structures that facilitated the catalytic reforming and CO2 absorption, benefited from the complex phase equilibria among different CCO compounds. The results in this study shed light on a new paradigm for the design of materials working at high temperatures thus suffering from serious sintering. © The Royal Society of Chemistry 2018.
英文关键词	Calcium; Carbon dioxide; Catalysts; Catalytic reforming; Functional materials; Glycerol; Phase equilibria; Sintering; Sorption; Steam reforming; Conventional approach; Enhanced steam reforming; High temperature; Layered material; Le chatelier's principles; Novel strategies; Reversible phase transition; Stable performance; Hydrogen production; biofuel; biological production; catalyst; experimental design; hydrogen; phase transition; sorption
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/190307
作者单位	School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, 510640, China; Department of Chemical and Biomolecular Engineering, North Carolina State University Campus, Box 7905, Raleigh, NC 27695-7905, United States
推荐引用方式 GB/T 7714	Dang C.,Li Y.,Yusuf S.M.,et al. Calcium cobaltate: A phase-change catalyst for stable hydrogen production from bio-glycerol[J],2018,11(3).
APA	Dang C..,Li Y..,Yusuf S.M..,Cao Y..,Wang H..,...&Li F..(2018).Calcium cobaltate: A phase-change catalyst for stable hydrogen production from bio-glycerol.Energy & Environmental Science,11(3).
MLA	Dang C.,et al."Calcium cobaltate: A phase-change catalyst for stable hydrogen production from bio-glycerol".Energy & Environmental Science 11.3(2018).