Shaping and silane coating of a diamine-grafted metal-organic framework for improved CO2 capture

Abstract Although metal-organic framework (MOF) powders can be successfully shaped by conventional methods, postsynthetic functionalization of the MOFs remains almost unexplored, yet is required to overcome intrinsic limitations, such as CO 2 adsorption capacity and stability. Here, we present a scalable synthesis method for Mg (dobpdc) MOF its beads, which are obtained using spray dry after mixing with alumina sol. The synthesized MOF/Al beads have micron-sized diameters moderate particle size distribution 30–70 μm. They also maintain high mechanical strength. N-ethylethylenediamine (een) coating long alkyl chain silanes results in een-MOF/Al-Si, exhibits significant working >11 wt% capture hydrophobicity. een-MOF/Al-Si microbeads retain their crystallinity improved uptake upon exposure humid conditions three days at desorption temperature 140 °C.