Separation of p-xylene from multicomponent vapor mixtures using tubular MFI zeolite mmbranes

Hierarchical Nanomanufacturing: From Shaped Zeolite Nanoparticles to High‐Performance Separation Membranes

“…[2][3][4][5][6][7][8][9][10][11][12] In addition, the possibility exists for simultaneously harnessing the well-known and widely exploited shape-selective catalytic properties of zeolitic materials and selective separations for implementation in catalytic membrane reactors. [6,[13][14][15][16][17][18][19][20] Zeolite films have also been targeted for other potential applications including chemical sensors, [2,12,21] ion-exchange electrodes, [22] insulating layers in microprocessors, [23][24][25] and light-harvesting devices. [26] The earliest reports of zeolitic membrane devices appeared in the early 1940s in regard to ion-selective sensing applications.…”

Zeolite Catalysis

“…Several groups have studied the separation of xylenes with MFI zeolite membranes demonstrating high permselectivity for p-xylene over the other isomers, attributed mainly to the preferential permeation of p-xylene, since the zeolite pores expose sterical hindrance for the permeation of the bulkier m-and o-xylene isomer molecules [104,221,[223][224][225]. In an outstanding study, Lai et al [226] reported on dramatic improvement of the p-/o-xylene separation by b-oriented silicalite-1 membranes.…”

Preparation of silicalite-1@Pt/alumina core–shell catalyst for shape-selective hydrogenation of xylene isomers

“…Several groups have studied the separation of xylene isomers through MFI zeolite membranes [12][13][14][15][16][17][18][19][20]. Keizer et al [12] reported that the separation factor of 0.62 kPa p-xylene and 0.52 kPa oxylene vapor mixtures had a maximum value of about 60 between room temperature and 473 K. Xomeritakis et al [13,14] studied an MFI-membrane synthesized on the surface of α-alumina disks to evaluate the separation of xylenes in the 295-548 K temperature range.…”