In:
AIChE Journal, Wiley, Vol. 69, No. 3 ( 2023-03)
Abstract:
Adsorbents executing molecular sieving mechanisms for the efficient separation of n ‐hexane (C6) alkane isomers require delicate pore size control, but afford unsatisfactory single‐component separations according to their branch degrees. Herein, we report a novel oxygenate‐pillared microporous adsorbent, MoOFOUR‐Co‐tpb, ([Co(tpb) 2 MoO 4 ], tpb = 1,2,4,5‐tetra(pyridin‐4‐yl) benzene), with three gourd‐shaped channels for dual pore‐size sieving of C6 isomers. In particular, MoOFOUR‐Co‐tpb excludes 2,2‐dimethylbutane, while 3‐methylpentane (3MP) can enter one channel showing a high uptake of 82.6 mg g −1 , contrasting to the n ‐hexane ( n HEX) adsorption by two channels (136 mg g −1 ). This dual pore‐size control strategy renders a record high equilibrium–kinetic combined selectivity for n HEX/3MP (30.2). Moreover, three‐ and five‐component breakthrough experiments confirm the practical separation performances and cycling stability. Multiple theoretical simulations reveal the separation mechanism and adsorption sites.
Type of Medium:
Online Resource
ISSN:
0001-1541
,
1547-5905
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2020333-0
detail.hit.zdb_id:
240008-X
Permalink