Highly reversible sorption of H2S and CO2 by an environmentally friendly Mg-based MOF†
Elí
Sánchez-González, 
‡a
J. Raziel
Álvarez,
a
Jorge
Balmaseda,
a
Eduardo
González-Zamora,
e
Guillaume
Maurin,
*b
Simon M.
Humphrey
*c
and
Ilich A.
Ibarra
*a
‡a
J. Raziel
Álvarez,
a
Jorge
Balmaseda,
a
Eduardo
González-Zamora,
e
Guillaume
Maurin,
*b
Simon M.
Humphrey
*c
and
Ilich A.
Ibarra
*a
Abstract
Mg-CUK-1, an ecologically friendly material synthesised in water is found to be a high-capacity, highly reversible adsorbent for acidic gases including H2S and CO2. Furthermore, Mg-CUK-1 is demonstrated to retain long-range crystallinity upon sorption cycling; its sorption performance is maintained over multiple cycles, even in the presence of high relative humidity (95%). Reversible H2S adsorption by Mg-CUK-1 is rare among MOFs studied for this purpose to date. The joint experimental and computational studies presented here show that Mg-CUK-1 is an effective solid adsorbent for applications in the field of acid gas capture, an application that is highly relevant for the purification of many industrial gas streams.
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