Comparative Evaluation of Different MOF and Non?MOF Porous Materials for SO ₂ Adsorption and Separation Showing the Importance of Small Pore Diameters for Low?Pressure Uptake

The search for adsorbents flue gas desulfurization processes is a current interest. For the first time, comparative experimental study of SO2 adsorption by porous materials including prototypical metal–organic frameworks NH2-MIL-101(Cr), Basolite F300 (Fe-1,3,5-BTC), HKUST-1 (Cu-BTC), zeolitic imidazolate (ZIF)-8, ZIF-67, alumosilicate Zeolite Y, silicoaluminumphosphate (SAPO)-34, Silica gel 60, covalent triazine framework (CTF)-1, and active carbon Ketjenblack carried out. Microporous with pore sizes in range 4–8 Å or nitrogen heterocycles are found to be optimal uptake low-pressure range. capacity at 1 bar correlates Brunauer-Emmett-Teller-surface area volume rather independently surface microstructure. Y SAPO-34 stable toward humid SO2. CTF-1(600) show most promising SO2/CO2 selectivity results an ideal adsorbed solution theory 265–149 63–43 mole fraction 0.01–0.5 SO2, respectively, 293 K bar.