화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.2, 366-375, February, 2017
DOI10.1007/s11814-016-0266-4  Export Citation
Carbonization and CO2 activation of scrap tires: Optimization of specific surface area by the Taguchi method
Zakaria Loloie, Mehrdad Mozaffarian†, Mansooreh Soleimani, and Neda Asassian
  • Department of Chemical Engineering, Amirkabir University of Technology, No. 424, Hafez Ave, P. O. Box 15875-4413, Tehran, Iran
E-mail:
This research demonstrates the production of activated carbon from scrap tires via physical activation with carbon dioxide. A newly constructed apparatus was utilized for uninterrupted carbonization and activation processes. Taguchi experimental design (L16) was applied to conduct the experiments at different levels by altering six operating parameters. Carbonization temperature (550-700 °C), activation temperature (800-950 °C), process duration (30-120 min), CO2 flow rate (400 and 600 cc/min) and heating rate (5 and 10 °C/min) were the variables examined in this study. The effect of parameters on the specific surface area (SSA) of activated carbon was studied, and the influential parameters were identified employing analysis of variance (ANOVA). The optimum conditions for maximum SSA were: carbonization temperature=650 °C, carbonization time=60min, heating rate=5 °C/min, activation temperature=900 °C, activation time=60min and CO2 flow rate=400 cc/min. The most effective parameter was activation temperature with an estimated impact of 49%. The activated carbon produced under optimum conditions was characterized by pore and surface structure analysis, iodine adsorption test, ash content, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR). The process yield for optimized activated carbon was 13.2% with the following properties: specific surface area=437m2/g, total pore volume=0.353 cc/g, iodine number=404.7mg/g and ash content=13.9% along with an amorphous structure and a lot of oxygen functional groups. These properties are comparable to those of commercial activated carbons.
Keywords:Scrap Tires;Activated Carbon;Physical Activation;Taguchi;Specific Surface Area;Optimization
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