Diffusion of CO2 in Large Crystals of Cu-BTC MOF
| Autor: | William T. Nunn, Trenton M. Tovar, M. Douglas LeVan, Junjie Zhao, Gregory N. Parsons, Gregory W. Peterson, Heather F. Barton |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Diffraction
Thermogravimetric analysis Chemistry Analytical chemistry 02 engineering and technology General Chemistry Microporous material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Biochemistry Catalysis 0104 chemical sciences Crystal Crystallography chemistry.chemical_compound Colloid and Surface Chemistry Adsorption Carbon dioxide Diffusion (business) 0210 nano-technology Bar (unit) |
| Zdroj: | Journal of the American Chemical Society. 138:11449-11452 |
| ISSN: | 1520-5126 0002-7863 |
| Popis: | Carbon dioxide adsorption in metal-organic frameworks has been widely studied for applications in carbon capture and sequestration. A critical component that has been largely overlooked is the measurement of diffusion rates. This paper describes a new reproducible procedure to synthesize millimeter-scale Cu-BTC single crystals using concentrated reactants and an acetic acid modulator. Microscopic images, X-ray diffraction patterns, Brunauer-Emmett-Teller surface areas, and thermogravimetric analysis results all confirm the high quality of these Cu-BTC single crystals. The large crystal size aids in the accurate measurement of micropore diffusion coefficients. Concentration-swing frequency response performed at varying gas-phase concentrations gives diffusion coefficients that show very little dependence on the loading up to pressures of 0.1 bar. The measured micropore diffusion coefficient for CO2 in Cu-BTC is 1.7 × 10(-9) m(2)/s. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|