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题名: Thermochemical CO2 splitting reaction with supported La(x)A(1-x)Fe(y)B(1-y)O(3) (A = Sr, Ce, B = Co, Mn; 0 <= x, y <= 1) perovskite oxides
作者: Jiang, Qingqing1, 2;  Tong, Jinhui1, 2;  Zhou, Guilin1, 2;  Jiang, Zongxuan1;  Li, Zhen1, 2;  Li, Can1
关键词: Solar energy ;  CO2 reduction ;  Perovskite oxide ;  Kinetics
刊名: SOLAR ENERGY
发表日期: 2014-05-01
DOI: 10.1016/j.solener.2014.02.033
卷: 103, 页:425-437
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: An efficient redox material for two-step thermochemical CO2 splitting reaction requires high chemical yield at relatively low reduction temperature. Herein, the oxides with perovskite structure of formula La(x)A(1-x)Fe(y)B(1-y)O(3) (A = Sr, Ce, B = Co, Mn; 0 <= x, y <= 1) start to release O-2 at 800 degrees C and the largest O-2 production is 11.8 ml/g(perovskite) at 1300 degrees C. However, for these unsupported La(x)A(1-x)Fe(y)B(1-y)O(3) materials, the CO production is low in spite of high reduction yield. ZrO2, Al2O3 and SiO2 are thus considered as supports to disperse La(x)A(1-x)Fe(y)B(1-y)O(3) materials and different supports induce great differences in the reaction activity. By A-site or B-site substitution of LaFeO3, the O-2 releasing temperature has fallen from 1230 degrees C to 800-950 degrees C and the CO production is enhanced 2-3 times. LaFe0.7Co0.3O3 (25 wt%)/SiO2 shows the highest reaction activity among these investigated materials with the O-2 production of 4.0 ml/g(material) (16.0 ml/g(perovskite)) and CO production of 7.6 ml/g(material) (30.4 ml/g(perovskite)) when it is reduced at 1300 degrees C and re-oxidized at 1100 degrees C, and the activity is relatively stable even after 10 cycles of the reaction. By contrast, the CO production is 4.5 ml/g for CeO2 when it is reduced at 1400 degrees C. The estimated activation energy for the reduction step of LaFe0.7Co0.3O3 (25 wt%)/SiO2 is around 89-149 KJ/mol according to different models. The CO generation step of LaFe0.7Co0.3O3 (25 wt%)/SiO2 is mainly controlled by bulk diffusion (D1) at 1000 degrees C and then it turns to first order surface reaction (F1) at 1100 degrees C. (C) 2014 Elsevier Ltd. All rights reserved.
关键词[WOS]: SOLAR HYDROGEN-PRODUCTION ;  METHANE COMBUSTION ;  CATALYTIC-ACTIVITY ;  KINETIC-ANALYSIS ;  WATER ;  DISSOCIATION ;  OXIDATION ;  CYCLES ;  CERIA ;  H2O
语种: 英语
WOS记录号: WOS:000336351800039
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/143228
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 Natl Lab Clean Energy, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Jiang, Qingqing,Tong, Jinhui,Zhou, Guilin,et al. Thermochemical CO2 splitting reaction with supported La(x)A(1-x)Fe(y)B(1-y)O(3) (A = Sr, Ce, B = Co, Mn; 0 <= x, y <= 1) perovskite oxides[J]. SOLAR ENERGY,2014,103:425-437.
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