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RESEARCH PRODUCT
An Ultrahigh CO2-Loaded Silicalite-1 Zeolite: Structural Stability and Physical Properties at High Pressures and Temperatures
Dominik DaisenbergerJavier Ruiz-fuertesJavier Ruiz-fuertesCatalin PopescuT. MarqueñoJosé L. JordáDavid Santamaría-pérezPlácida Rodríguez-hernándezRaquel Chuliá-jordánAlfonso MuñozS. G. MacleodS. G. MacleodFernando ReyC. P. McguireAbby Kavnersubject
DiffractionChemistry02 engineering and technology010402 general chemistry021001 nanoscience & nanotechnology01 natural sciencesSynchrotron0104 chemical scienceslaw.inventionInorganic ChemistryChemical engineeringStructural stabilitylawThermalCompressibilityMoleculePhysical and Theoretical Chemistry0210 nano-technologyZeolitePorositydescription
[EN] We report the formation of an ultrahigh CO2-loaded pure-SiO2, silicalite-1 structure at high pressure (0.7 GPa) from the interaction of empty zeolite and fluid CO, medium. The CO2-filled structure was characterized in situ by means of synchrotron powder X-ray diffraction. Rietveld refinements and Fourier recycling allowed the location of 16 guest carbon dioxide molecules per unit cell within the straight and sinusoidal channels of the porous framework to be analyzed. The complete filling of pores by CO, molecules favors structural stability under compression, avoiding pressure-induced amorphization below 20 GPa, and significantly reduces the compressibility of the system compared to that of the parental empty one. The structure of CO2-loaded silicalite-1 was also monitored at high pressures and temperatures, and its thermal expansivity was estimated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-05-08 |