トド松繊維炭素化物による重油の収着・回収・リサイクル

Abstract

Fibrous component in fir tree was separated and carbonized to 900℃ in inert atmosphere. Carbonized fir fibers thus prepared were found to have very high sorption capacity for heavy oils, both less viscous grade-A and viscous grade-C oils, which showed very strong dependence on bulk density of fir fibers. Heavy oil sorbed could be recovered from carbonized fir fibers with high efficiency as about 90% by either filtration under suction or washing with n-hexane. Sorption capacity showed a reduction with cycling of sorption and recovery to about 60% of the first cycle. Viscous grade-C oil could be recovered by less viscous grade-A oil, a mixture of grade-A with grade-C being called grade-B oil. Adsorption of water, particularly sea water by 900℃-carbonized fir fibers was very small in comparison with sorption capacity for heavy oils. The mousse-like mixture of grade-C heavy oil with water was sorbed into carbonized fir fibers, although sorption rate became a little slower.