DOI: 10.1016/j.jcou.2018.06.015
Scopus记录号: 2-s2.0-85048953144
论文题名: Solar thermochemical CO2 splitting using cork-templated ceria ecoceramics
作者: Costa Oliveira F.A. ; Barreiros M.A. ; Abanades S. ; Caetano A.P.F. ; Novais R.M. ; Pullar R.C.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 26 起始页码: 552
结束页码: 563
语种: 英语
英文关键词: Ceria
; CO2 splitting
; Concentrated solar power
; Cork
; Solar fuels
; Thermochemical cycle
Scopus关键词: Carbon dioxide
; Cerium compounds
; Granulation
; Inert gases
; Reaction rates
; Solar energy
; Surface reactions
; CO2 splitting
; Concentrated solar power
; Cork
; Solar fuels
; Thermochemical cycles
; Cerium oxide
英文摘要: This work addresses the solar-driven thermochemical production of CO and O2 from two-step CO2-splitting cycles, using both ceria granules prepared from cork templates (CG) and ceria foams from polyurethane templates (CF). These materials were cycled in a high-temperature indirectly-irradiated solar tubular reactor using a temperature-swing process. Samples were typically reduced at 1400 °C using concentrated solar power as a heating source and subsequently oxidised with CO2 between 1000-1200 °C. On average, CO production yields for CG were two times higher than for CF, indicating that the morphology of this three-dimensionally ordered macroporous (3-DOM) CeO2 improves the reaction kinetics. Their performance stability was demonstrated by conducting 11 cycles under solar irradiation conditions. Slightly increasing the reduction temperature strongly enhanced the reduction extent, and thus the CO production yield (reaching about 0.2 mmol g-1 after reduction at 1450 °C in inert gas), while decreasing the oxidation temperature mainly improved the CO production rate (up to 1.43 μmol s-1 g-1 at 1000 °C). Characterisation of the 3-DOM structure, by means of XRD and SEM, provided insights into the reactivity behaviour of the developed materials. The pre-sintered ceria granules retained their structure after cycling. The fact that the mean cell size of CG is smaller (at least one order of magnitude) than that of CF suggests that its exposed surfaces enhanced reaction rates by a factor of two. Moreover, the maximum fuel production rate of CG was roughly three times greater than that reported previously for a ceria reticulated porous foam with dual-scale porosity. © 2018 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111832
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: LNEG - Laboratório Nacional de Energia e Geologia I.P., LEN - Laboratório de Energia, Renewable Energy and Energy System Integration Unit, Estrada do Paço do Lumiar 22, Lisboa, 1649-038, Portugal; Processes, Materials, and Solar Energy Laboratory (PROMES-CNRS), 7 Rue du Four Solaire, Font-Romeu, 66120, France; Department of Materials and Ceramic Engineering, CICECO - Aveiro Institute of Materials, University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
Recommended Citation:
Costa Oliveira F.A.,Barreiros M.A.,Abanades S.,et al. Solar thermochemical CO2 splitting using cork-templated ceria ecoceramics[J]. Journal of CO2 Utilization,2018-01-01,26