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题名: Two-step thermochemical cycles for CO2 splitting on Zr-doped cobalt ferrite supported on silica
作者: Tong, Jinhui1;  Jiang, Qingqing1;  Chen, Zhenpan1;  Jiang, Zongxuan1;  Li, Can1
关键词: Two-step thermochemical cycle ;  CO2 splitting ;  Zr-doped ferrite
刊名: SOLAR ENERGY
发表日期: 2015-06-01
DOI: 10.1016/j.solener.2015.04.007
卷: 116, 页:133-143
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Technology
类目[WOS]: Energy & Fuels
研究领域[WOS]: Energy & Fuels
英文摘要: Silica-supported Zr-doped cobalt ferrite complex oxides, Co1-2xZrxFe2O4/SiO2 (0 <= x <= 0.15) were prepared via a simple sol-gel auto-combustion method using aqueous silica colloid as the silica source. The products were used as reactive materials in two-step thermochemical cycles for CO2 splitting. Compared to undoped cobalt ferrite, the Zr-doped ones can significantly enhance the rates of the reduction and oxidation steps as well as the yields of CO. The Zr-doped sample also showed greater recyclability than the undoped one. When the sample Co0.8Zr0.1Fe2O4/SiO2 was used as reactive material, the average production of 24.4 mL/g(ferrite) for O-2 and 40.2 mL/g(ferrite) for CO were obtained after 20 cycles at 1400 and 1100 degrees C respectively. A kinetic analysis indicated the apparent activation energy in the CO2 splitting step over Co0.8Zr0.1Fe2O4/SiO2 is 118.0 +/- 1.2 kJ/mol, while it is 133.0 +/- 2.1 kJ/mol for CoFe2O4/SiO2. (c) 2015 Elsevier Ltd. All rights reserved.
关键词[WOS]: FEO/FE3O4 REDOX REACTIONS ;  SOLAR HYDROGEN-PRODUCTION ;  CARBON-DIOXIDE ;  NONSTOICHIOMETRIC CERIA ;  REACTIVE MATERIAL ;  KINETIC-ANALYSIS ;  SOLID-SOLUTIONS ;  WATER ;  REDUCTION ;  ZN/ZNO
语种: 英语
WOS记录号: WOS:000356198300013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/146331
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China

Recommended Citation:
Tong, Jinhui,Jiang, Qingqing,Chen, Zhenpan,et al. Two-step thermochemical cycles for CO2 splitting on Zr-doped cobalt ferrite supported on silica[J]. SOLAR ENERGY,2015,116:133-143.
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