کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
596065 | 1454039 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of CO2 activated carbon from corncob for monoethylene glycol adsorption
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Activated carbon was produced from corncob using CO2 for the activation process. This research investigated the effect of the remaining volatile matter in corncob char combined with CO2 activation to improve the pore properties of corncob activated carbon. The pore structure was characterized using the Brunauer-Emmett-Teller (BET) surface area test, total pore volume, mesopore volume, micropore volume and average pore diameter. This study discovered that the amount of volatile matter in corncob char is about 17-25% and results in a BET surface area range of 919-986 m2 gâ1 by the CO2 activation process. Therefore, the optimum temperature for the activation process should start at 450-550 °C and increase until the temperature reaches to 800 °C. Activated carbon from corncobs at 450-550 °C contained a suitable amount of volatile matter, 17-25%, for pore development. The Langmuir and Dubinin-Radushkevich (D-R) adsorption models were used to study the equilibrium isotherms, the isotherm constants and the adsorption capacity of monoethylene glycol by corncob activated carbon and commercial activated carbon. The values of Langmuir isotherms Qmax of corncob activated carbon and commercial activated carbon were 4.509 and 5.910molMEGkgadsorbentâ1, respectively. The D-R isotherms were described the adsorption capacity and the free energy (E) of adsorption. The values of E (kJ molâ1) confirmed that monoethylene glycol adsorption by corncob activated carbon and commercial activated carbon was a physisorption.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 333, Issues 1â3, 5 February 2009, Pages 19-25
Journal: Colloids and Surfaces A: Physicochemical and Engineering Aspects - Volume 333, Issues 1â3, 5 February 2009, Pages 19-25
نویسندگان
Amphol Aworn, Paitip Thiravetyan, Woranan Nakbanpote,