화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.2, 413-424, February, 2017
DOI10.1007/s11814-016-0268-2  Export Citation
Adsorptive separation of CO2 and CH4 by the broom sorghum based activated carbon functionalized by diethanolamine
Elaheh Mehrvarz, Ali Asghar Ghoreyshi†, and Mohsen Jahanshahi
  • Chemical Engineering Department, Babol University of Technology, Shariati Street, Babol, Iran
E-mail:
A low-cost activated carbon (AC) was produced from the broom sorghum stalk using KOH as the chemical activating agent, and then the surface of AC was functionalized with diethanolamine to enhance CO2/CH4 selectivity. Characteristics of pristine and DEA-functionalized ACs were determined through different analyses such as Boehm’s method, BET, FT-IR, SEM, and TGA. The adsorption behavior of pure carbon dioxide and pure methane on these adsorbents was investigated in a temperature range of 288-308 K and pressure range of 0-25 bar using an apparatus based on a volumetric method. Results indicated that amine functionalization significantly improved the selectivity of CO2/CH4. The enhancement of CO2 ideal adsorption selectivity over CH4 from 1.51 for the pristine AC to 5.75 for the AC-DEA was attributed to adsorbate-adsorbent chemical interaction. The present DEA-functionalized AC adsorbent can be a good candidate for applications in natural gas and landfill gas purifications.
Keywords:Activated Carbon;Broom Sorghum;Carbon Dioxide;Methane;Functionalization;Diethanolamine
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