DOI: 10.1016/j.jcou.2018.08.007
Scopus记录号: 2-s2.0-85052731461
论文题名: Enhanced activity of Mg-Fe-O ferrites for two-step thermochemical CO2 splitting
作者: Huang J. ; Fu Y. ; Li S. ; Kong W. ; Zhang J. ; Sun Y.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 27 起始页码: 450
结束页码: 458
语种: 英语
英文关键词: CO production
; CO2 splitting
; Internal reaction
; Mg-Fe-O ferrites
; Self-regeneration
Scopus关键词: Carbon dioxide
; Differential scanning calorimetry
; Frequency modulation
; Hematite
; Magnesia
; Scanning electron microscopy
; Solid state reactions
; Co-production
; CO2 splitting
; Inert atmospheres
; Internal reaction
; Kinetic analysis
; Self regeneration
; Self-regenerative function
; Ssbauer spectroscopies
; Ferrites
英文摘要: Ferrites have been investigated as the most promising and active redox materials for two-step thermochemical CO2 splitting. Reactions are conducted in a two-step cycle, in which the ferrites are generally reduced at 1400°C in an inert atmosphere, then the reduced ferrites are re-oxidized by reacting with CO2 at 1000°C to produce CO. In this work, Mg-Fe-O ferrites (designated as FM-x, x denotes as the mole fraction of Fe2O3 to MgO+Fe2O3) were screened for activity in two-step thermochemical CO2 splitting. Ferrites were characterized by differential scanning calorimetry (DSC), X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman and Mössbauer spectroscopies. The self-regenerative function and internal reaction, which are responsible for the initial higher CO production rate and a greater utilization of the bulk ferrites, respectively, were confirmed for Mg-Fe-O ferrites. Consequently, the self-regenerative FM-0.2 with internal reaction possesses a 2.2 times higher CO yield as compared with that of FM-0.5. Kinetic analysis was conducted in consideration of various solid state reaction models, and bulk diffusion, which is an indication of internal reaction, was found to be the crucial factor for the accessibility of the bulk redox species. © 2018 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111787
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: CAS Key Laboratory of Low-Carbon Conversion Science and Engineering, Shanghai Advanced Research Institute, Chinese Academy of Science, Shanghai, 201203, China; University of Chinese Academy of Sciences, Beijing, 100049, China; School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201203, China
Recommended Citation:
Huang J.,Fu Y.,Li S.,et al. Enhanced activity of Mg-Fe-O ferrites for two-step thermochemical CO2 splitting[J]. Journal of CO2 Utilization,2018-01-01,27