20-P-12-Preparation of silicalite-1 and beta zeolite/ceramic composite membranes and removal of trace phenol and benzene from water through them

Abstract

This chapter discusses a preparation of silicalite-I and beta zeolite/ceramic composite membranes and removal of trace phenol and benzene from water through them. The in situ syntheses of silicalite-1 and beta zeolite membranes on the ceramic filter substrates are performed. The physico-chemical properties of the zeolite composite membranes are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet (UV) radiation. The removal of phenol and benzene from water through the zeolite composite membranes is studied. Silicalite-1 and beta membranes possess good separation ability for PhOH/H 2 O and C 6 H 6 /H 2 O. Beta membrane is better than that of silicalite-1 for PhOH/H 2 O. The average rejection rates of beta and silicalite-1 membranes for PhOH/H 2 O are 69.9% and 51.5%, respectively. The separation capacity of silicalite-1 zeolite membrane for PhOH/H 2 O and C 6 H 6 /H 2 O increased after twice synthesis and steam treatment.