Gravimetric and FTIR study of the interaction of tetramethylethylene on a MFI zeolite

摘要

The adsorption of tetramethylethylene on a high siliceous ZSM-5 zeolite was performed by thermogravimetry,in situ FTIR spectroscopy and molecular dynamics simulation.Sorption and spectroscopic data were analysed as a function of loading and compared with molecular dynamics simulated results to characterize the adsorption process.The isotherm at 298 K does not show any deviation from the type I behaviour.The presence of admolecules in micropores does not or weakly affect zeolite framework vibration bands but induces an additional band at around 1715 cm~(-1) mainly due to a contribution of the microporous surface of the adsorbent.A confinement effect of the adsorbate is characterized during the adsorption process.