| 초록 |
Synergy effects of the basic grapitic-C3N4 (g-C3N4) impregnated on Lewis acidic alumina were investigated to remove naphthenic acids (NA) in a highly acidic crude oil (Total acid number (TAN) of over 2.7). Among various elimination methods of NAs in crude oils, catalytic decarboxylation of NAs has been attracted due to its simple process scheme just by using Lewis acidic solid catalysts. The mesoporous alumina having Lewis acid sites was found to be effective for NA removal, and the synthesized Al2O3@g-C3N4 showed further increased activity. The roles of the g-C3N4 were to reduce the coke depositions in a liquid-phase reaction by modulating the strong adsorptions of reactants. For a regeneration of the used Al2O3@g-C3N4, the proper washing solvents such as toluene, hexane, and dodecane were also investigated to verify the recycling method of the Al2O3@g-C3N4, where the toluene was found to be a proper solvent to wash out the deposited hydrocarbons from the inner pores of Al2O3@g-C3N4. |
