DOI: 10.1016/j.jcou.2017.01.029
Scopus记录号: 2-s2.0-85014922084
论文题名: Gas sorption and kinetics of CO2 sorption and transport in a polymorphic microporous MOF with open Zn (II) coordination sites
作者: Landaverde-Alvarado C. ; Morris A.J. ; Martin S.M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2017
卷: 19 起始页码: 40
结束页码: 48
语种: 英语
英文关键词: Adsorption thermodynamics
; CO2 capture
; Gas sorption
; Kinetics
; MOFs
; Post-combustion capture
Scopus关键词: Activation energy
; Adsorption
; Chemical activation
; Combustion
; Crystalline materials
; Desorption
; Enzyme kinetics
; Java programming language
; Kinetics
; Microporosity
; Organometallics
; Sorption
; Temperature
; Thermodynamics
; Zinc
; Zinc compounds
; Adsorption and desorptions
; Adsorption thermodynamics
; Gas Sorption
; Ideal adsorbed solution theories (IAST)
; Langmuir adsorption model
; Metal organic framework
; MOFs
; Post-combustion captures
; Carbon dioxide
英文摘要: Sorption equilibrium and kinetics of CO2, N2 and CH4 on a newly reported Zn-based metal organic framework (Zn4(pydc)4(DMF)2·3DMF (1)) were studied to evaluate its efficacy for CO2 capture under realistic post-combustion conditions. Adsorption and desorption equilibria were measured gravimetrically for temperatures between 308 K and 338 K and pressures up to 5 bar. The Langmuir adsorption model was used to fit sorption data and the Ideal Adsorbed Solution Theory (IAST) was used to calculate selectivity from single-component isotherms suggesting that separation can be enhanced by a decrease in temperature. The MOF exhibited preferential CO2 adsorption based on the high enthalpy of adsorption and adsorption selectivities of CO2 over N2 and CH4. Kinetics of adsorption and desorption of CO2 (308K-338 K, pressures up to 1 bar) were fitted to the linear-driving force (LDF) kinetic model, showing a relatively fast adsorption and a low activation energy for adsorption and desorption. Diffusion inside the pores was found to be the rate-limiting step based on fits to the LDF model and the micropore diffusion model. Desorption kinetics studies at 1 bar indicated that CO2 has greater average residence times at all temperatures and lower values of activation energy for desorption than N2 and CH4. This suggests the selective adsorption and capture of CO2 on (1) will be favored. © 2017 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52755
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Landaverde-Alvarado C.,Morris A.J.,Martin S.M.. Gas sorption and kinetics of CO2 sorption and transport in a polymorphic microporous MOF with open Zn (II) coordination sites[J]. Journal of CO2 Utilization,2017-01-01,19