Appending Polyamines on Metal–Organic Frameworks as an Efficient Strategy for Selective Removal of H2S under Humid Conditions
(2024) ACS Applied Engineering Materials — Vol. 2, n° 11, p. 2619-2625 (2024)
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- Removal of highly toxic and corrosive hydrogen sulfide from gas flows is of paramount importance for controlling the environment and in several industrial processes. This contribution reports a straightforward strategy to engineer sorbents for efficient hydrogen sulfide removal under humid conditions by functionalizing the open metal sites of metal–organic frameworks (MOFs) with polyamines. MIL-101(Cr) MOFs were successfully modified with ethylenediamine and tris(2-aminoethyl)amine, and the resulting materials were characterized using X-ray diffraction, FTIR, NMR, nitrogen sorption, and thermogravimetric analysis (TGA), confirming the functionalization. Although the functionalized MOFs exhibited a greater affinity for water compared to the unmodified MIL-101(Cr), they efficiently removed H2S under humid conditions without framework degradation, whereas the pristine material did not. This was demonstrated by TGA-MS and elemental analysis and confirmed by density functional theory calculations. The developed approach offers a promising pathway for the design of advanced sorbents tailored for H2S removal in industrial and environmental applications.
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Esser, G., Crits, R., Barozzino-Consiglio, G., Daouli, A., Maurin, G., Filinchuk, Y., Hermans, S., & Steenhaut, T. (2024). Appending Polyamines on Metal–Organic Frameworks as an Efficient Strategy for Selective Removal of H2S under Humid Conditions. ACS Applied Engineering Materials, 2(11), 2619-2625. https://doi.org/10.1021/acsaenm.4c00535 (Original work published 2024)