Sorbate-induced structural changes in ZSM-5 (silicalite)

Abstract

The high-field (9.4 T)²⁹Si m.a.s. n.m.r. spectrum (m.a.s. = magic angle spinning) of highly siliceous ZSM-5 (silicalite) shows that changes in the zeolite structure occur when sorbate molecules are present; these changes occur at low loading levels and are characteristic of the nature of the sorbed molecules, and X-ray diffraction confirms that the effect is a perturbation of the zeolite structure itself.