DOI: 10.1016/j.jcou.2018.11.008
Scopus记录号: 2-s2.0-85057305938
论文题名: Exploring the stability of Fe2O3-MgAl2O4 oxygen storage materials for CO production from CO2
作者: Buelens L.C. ; Dharanipragada A.N.V.R. ; Poelman H. ; Zhou Z. ; Marin G.B. ; Galvita V.V.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2019
卷: 29 起始页码: 36
结束页码: 45
语种: 英语
英文关键词: CO Production
; CO2 conversion
; Iron oxide
; Mg-Fe-Al-O
Scopus关键词: Aluminum compounds
; Carbon dioxide
; Hematite
; Iron oxides
; Oxygen
; Sintering
; Storage (materials)
; X ray diffraction
; Characterization techniques
; Co-production
; Crystallographic properties
; N2 adsorption
; Oxygen storage capacity
; Oxygen storage materials
; Space time yield
; Spinel structure
; Magnesium compounds
英文摘要: The stability of Fe2O3-MgAl2O4 oxygen storage materials (OSMs) was investigated over 1000 redox cycles using H2 as reductant and CO2 as oxidant. Three different materials, with a nominal Fe2O3 amount of 10 wt%, 30 wt% and 50 wt%, were evaluated. Characterization techniques such as N2 adsorption, XRD and STEM-EDX were applied to study the evolution of morphological and crystallographic properties. XRD results show that Fe is incorporated in the MgAl2O4 lattice of the as prepared materials, yielding a Mg-Fe-Al-O spinel structure. After redox cycling, part of Fe still remains within the spinel. The results of redox cycling reveal superior properties for 10Fe2O3-MgAl2O4, exhibiting stability in terms of morphology and, with an average space-time yield of 700 mmolCO s-1 kgFe -1, the highest activity among the OSMs studied. However, 50Fe2O3-MgAl2O4 performs best in terms of overall CO yield, i.e. 0.6 mol CO kgOSM -1, more than twofold higher compared to 10Fe2O3-MgAl2O4 and 30Fe2O3-MgAl2O4 even after 1000 cycles. Deactivation through sintering occurs in all three materials, though to a lesser extent for 10Fe2O3-MgAl2O4. Phase transformation to a MgxFe1-xO phase predominantly causes a loss of oxygen storage capacity in 30Fe2O3-MgAl2O4 and 50Fe2O3-MgAl2O4. © 2018 Elsevier Ltd. All rights reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117329
Appears in Collections: 气候变化与战略
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Recommended Citation:
Buelens L.C.,Dharanipragada A.N.V.R.,Poelman H.,et al. Exploring the stability of Fe2O3-MgAl2O4 oxygen storage materials for CO production from CO2[J]. Journal of CO2 Utilization,2019-01-01,29