Separation of C_6 isomers by vpaor permeation and pervaporation through ZSM-5 membranes

摘要

An alkali-free synthesis method (Si/Al=600 in the gel) was used to prepare H-ZSM-5 zeolite membranes supported on porous stainless steel and alumina tubes. These membranes seprated mixtures of C_6 isomers with high selectivities by both vapor permeation and pervaporation. The single gas and mixture permeances were similar for vapor permeation throguh the stainless steel-supported membrane, indicating that separation was due to shape selectivity; the linear molecule diffused faster.