Abstract
A multinculear NMR study is preformed in the sorption of water and methanol onto zeolite H-rho. The effect of sorption on the MAS NMR of the framework nuclei is reflected in the progressive increase of the /sup 27/Al signal intensity (which is negligible in dry H-rho) and by the gradual improvement in the resolution of the /sup 28/Si spectrum (which is very poor in dry H-rho). The limiting spectra of these nuclei are reached at a sorbate:framework-Al ratio of 2:1. Proton MAS and /sup 2/H quadrupole-echo spectra are used to characterize the species formed upon sorbate addition. Depending on the loading level a variety of species are identified with dynamic features ranging from essentially solid (at low loading) to highly fluid (at high loading). Similar NMR results on the framework nuclei /sup 27/Al and /sup 28/Si are also reported for zeolite H-Y.
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