DOI: 10.1016/j.jcou.2017.03.015
Scopus记录号: 2-s2.0-85016781574
论文题名: Effect of micro-structure and oxygen vacancy on the stability of (Zr-Ce)-additive CaO-based sorbent in CO2 adsorption
作者: Guo H. ; Feng J. ; Zhao Y. ; Wang S. ; Ma X.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 19 起始页码: 165
结束页码: 176
语种: 英语
英文关键词: (Zr-Ce)-additive
; CaO-based
; CO2 capture
; Oxygen vacancy
; Sol-gel
Scopus关键词: Adsorption
; Calcium
; Carbon dioxide
; Crystallites
; Electron microscopy
; Electron spin resonance spectroscopy
; High resolution transmission electron microscopy
; Magnetic resonance
; Microstructure
; Oxygen
; Paramagnetic resonance
; Scanning electron microscopy
; Sol-gel process
; Sol-gels
; Sorbents
; Sorption
; Transmission electron microscopy
; X ray diffraction
; X ray photoelectron spectroscopy
; CaO-based
; Crystallite growth
; Double exponential
; Electron paramagnetic resonances (EPR)
; Inert components
; Nano-sized particles
; Uniform distribution
; Well-dispersed
; Oxygen vacancies
英文摘要: This study describes the role of micro-structure and oxygen vacancy in CO2 adsorption over (Zr-Ce)-additive CaO. The sorbent was prepared by sol-gel and subjected to characterization in terms of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and electron paramagnetic resonance (EPR). The sorbent (Ca/Zr/Ce = 30:0.5:0.5) demonstrated an excellent CO2 capture capacity (0.65 gCO2/gsorbent) up to 35 cycles. The enhanced performance is attributed to well-dispersed Ce2Zr2O7 crystallite particle which prevents CaO crystallite growth and agglomeration. The presence of flake microstructure with porosity, nanosized particles, and uniform distribution of Ca and the inert components are essential to the adsorption of CO2. The existence of Ce4+ in the crystal phase of Ce2Zr2O7 may create oxygen vacancy, which favors the diffusion of CO2 and mobility of O2-, further greatly facilitating the capture of CO2. The kinetics of CO2 adsorption was estimated by a double exponential method. © The Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52745
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Guo H.,Feng J.,Zhao Y.,et al. Effect of micro-structure and oxygen vacancy on the stability of (Zr-Ce)-additive CaO-based sorbent in CO2 adsorption[J]. Journal of CO2 Utilization,2017-01-01,19