| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 2.4 MB | Adobe PDF |
Advisor(s)
Abstract(s)
Zeolites and metal-organic frameworks (MOFs) are considered as
“competitors” for new separation processes. The production of high-quality
gasoline is currently achieved through the total isomerization process that
separates pentane and hexane isomers while not reaching the ultimate goal of
a research octane number (RON) higher than 92. This work demonstrates
how a synergistic action of the zeolite 5A and the MIL-160(Al) MOF leads to a
novel adsorptive process for octane upgrading of gasoline through an efficient
separation of isomers. This innovative mixed-bed adsorbent strategy
encompasses a thermodynamically driven separation of hexane isomers
according to the degree of branching by MIL-160(Al) coupled to a steric
rejection of linear isomers by the molecular sieve zeolite 5A. Their adsorptive
separation ability is further evaluated under real conditions by sorption
breakthrough and continuous cyclic experiments with a mixed bed of shaped
adsorbents. Remarkably, at the industrially relevant temperature of 423 K, an
ideal sorption hierarchy of low RON over high RON alkanes is achieved, i.e.,
n-hexane ≫n-pentane ≫2-methylpentane > 3-methylpentane⋙
2,3-dimethylbutane > isopentane ≈ 2,2-dimethylbutane, together with a
productivity of 1.14 mol dm−3 and a high RON of 92, which is a leap-forward
compared with existing processes.
Description
Keywords
Gasoline Metal organic frameworks (MOFs) Separation Simulation Zeolite
Citation
Brântuas, Pedro F.; Henrique, Adriano; Wahiduzzaman, Mohammad; Wedelstedt, Alexander von; Maity, Tanmoy; Rodrigues, Alírio; Nouar, Farid; Lee, U-Hwang; Cho, Kyung-Ho; Maurin, Guillaume; Silva, José A.C.; Serre, Christian (2022). Separation of branched alkanes feeds by a synergistic action of zeolite and metal-organic framework. Advanced Science. EISSN 2198-3844. 9:22, p. 1-8