New Activated Carbon Production Process from Scrap Tire Using Fluidizing Bed

摘要

A new activated carbon production process from scrap tire using a fluidizing bed was proposed. The ap~rat~ used for the laboratory test was as follows; a reaction tube made of quartz was 30 mm4 x 300 mm long and was set in a vertical electric furnace. On the distribution plate placed at the center of the reaction tube, a raw material mixture of 5 g of rubber tip with 2—4 mm~ and 10 g of sand with <1 mm4) was fed. The furnace was heated at 10 C/min under N2 stream of 200 mL/min. Water of 1.2 mL/min was introduced to the stream at 600 C. Activated carbon was produced at the reaction temperatures of 800—850 0C during reaction period in the range of 30—120 mm. Medium sand mixing promoted the acti-vation, and activated carbon with the BET surface area of 708 m2/g was obtaind. Additionally, from a TG test and a gas chromatogram it was found that thermal decomposition of tire is completed below 500 0C. The residual carbon was processed as the raw material for next activation process. A new activated carbon production process using a fluidizing bed was presented. This medium sand fluidizing bed con-sists of two stages: upper stage; decomposition, and lower stage; activation.