New activated carbon production process from scrap tire using fluidizing bed

A new activated carbon production process from scrap tire using a fluidizin g bed was proposed. The apparatus used for the laboratory test was as follo ws; a reaction tube made of quartz was 30 mm phi x 300 mm long and was set in a vertical electric furnace. On the distribution plate placed at the cen ter of the reaction tube, a raw material mixture of 5 g of rubber tip with 2-4 mm phi and 10 g of sand with < 1 mm phi was fed. The furnace was heated at 10 degrees C/min under N-2 stream of 200 mL/min. Water of 1.2 mL/min wa s introduced to the stream at 600 degrees C. Activated carbon was produced at the reaction temperatures of 800-850 degrees C during reaction period in the range of 30-120 min. Medium sand mixing promoted the activation, and a ctivated carbon with the BET surface area of 708 m(2)/g was obtaind. Additi onally, from a TG test and a gas chromatogram it was found that thermal dec omposition of tire is completed below 500 degrees C. The residual carbon wa s processed as the raw material for next activation process. A new activate d carbon production process using a fluidizing bed was presented. This medi um sand fluidizing bed consists of two stages: upper stage; decomposition, and lower stage; activation.