Adsorption desulfurization over porous carbons derived from ZIF-67 and AC

The ZIF/AC materials, produced from trace amounts of zeolite imidazole skeleton ZIF-67 loaded onto commercial activated carbon (AC) particles and subsequently calcined for 6 ​h at a series of temperatures, exhibit highly dispersed Co and N on its surface, especially showing the same specific surface area as the original activated carbon at 800 ​°C (Co/AC-800). The adsorption desulfurization performance of Co/AC-800 for dibenzothiophene (DBT) is better than that of the two matrix materials and still the same after 5 cycles, which is mainly ascribed to the acid-base interaction, π-π interaction and further demonstrated by the quasi-second-order kinetics and Langmuir model.