Effectiveness of metal–organic frameworks for removal of refractory organo-sulfur compound present in liquid fuels

Fuel, Volume 90, Issue 1, January 2011, Pages 190-197

Effectiveness of metal–organic frameworks for removal of refractory organo-sulfur compound present in liquid fuels

G. Blanco-Brieva (a), J.M. Campos-Martin (a), S.M. Al-Zahrani (b), J.L.G. Fierro (a)

jlgfierro@icp.csic.es

a Sustaninable Energy and Chemistry Group (EQS), Instituto de Catálisis y Petroleoquímica, CSIC, c/Marie Curie, 2 Cantoblanco, 28049 Madrid, Spain1

b Chemical Engineering Department, College of Engineering, King Saud University, Riyadh, Saudi Arabia

Abstract

Adsorption of organo-sulfur compounds present in liquid fuels on metal–organic framework (MOF) compounds is an efficient alternative to the conventional hydrodesulfurization process. The extent of dibenzothiophene (DBT) adsorption at temperatures close to ambient (304 K) is much higher on MOFs systems than on the benchmarked Y-type zeolite …

With the intent to investigate the operation in consecutive cycles, the MOFs used in adsorption experiments were regenerated.  Examination of S2p core-level spectrum of the adsorbed S-compounds of regenerated MOFs pointed out that a fraction of these molecules become oxidized into S(VI) species.

[EXCERPT]

Considering that S-atom interacts on the surface cations through both S–M (M = Cu, Fe, and Al) bonding and π-complexation, it would seem that such interactions are stronger on Cu 2+ than on Fe 3+ and even more than on Al 3+ ions. ...

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