OP-II-3

OP-III-B-13ADDITIVE EFFECTS OF TYRE RUBBER CONSTITUENTS UPONCOAL LIQUEFACTIONSugano M. 1 , Kashiwagi O. 1 , Iwabuchi Y. 1 , Tsuge T. 1 and Hirano K. 1Nihon University, Graduate School of Science and Technology, Department ofMaterials and Applied Chemistry. E-mail: sugano@chem.cst.nihon-u.ac.jpIntroduction It is well known that the amount of waste tyre increases every year,and a numerous amount of waste tyre is landfilled or dumped all over the world,which causes environmental problems, such as destruction of natural places and therisk of fires. Therefore, investigating the effective method for processing of waste tyreis a serious problem. It was reported that liquefaction of tyre to obtain fuel is one ofthe processing method of waste tyre [1,2]. Therefore, coprocessing of waste tyre andcoal as one of the effective processing method of both materials has beeninvestigated. On coprocessing, the synergistic effects, such as the increases ofconversion [3], the yields of oil [4] and asphaltene [3,5] constituents, were reported incomparison with the result of individual liquefaction of waste tyre or coal alone. In thisstudy, coprocessing of two kinds of coal with two kinds of tyre rubber constituents iscarried out to discuss the additive effect of the rubber constituent and the effect ofcoal rank on coprocessing.Experimental The coal samples (Wyoming subbituminous and Huaipeibituminous coals) was pulverized to pass through a 60 mesh screen. The tyre rubbersamples (natural rubber [NR] and styrene butadiene rubber [SBR]) were divided intosmall pieces (5×5×20 mm). Mixture of coal (2.5 g) and tyre rubber (7.5 g) was placedin a 100 cm 3 autoclave under an initial H 2 pressure of 5.9 MPa. The reactor washeated and maintained at 440°C for 1 h. After cooling, the gaseous products (gas)were collected and analyzed using GC-TCD. The products remaining in the reactorwere successively extracted with acetone and n-hexane to separate into the acetoneinsoluble (residue), the acetone soluble but n-hexane insoluble (asphaltene), and then-hexane soluble (oil) materials. The oil yield was calculated from the differencebetween the weight of the feed sample and that of the recovered constituents (gas +asphaltene + residue) on a daf basis. Individual liquefactions of tyre rubber (10 g)and coal (2.5 g) with decalin (5g) were carried out in a similar way.Results and Discussion Estimating from the analytical data of used coals andtyre rubber materials (not shown in this abstract for lack of space), the content of204