کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
208235 461243 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A novel method for production of activated carbon from waste tea by chemical activation with microwave energy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
A novel method for production of activated carbon from waste tea by chemical activation with microwave energy
چکیده انگلیسی

This study presents the production of activated carbon from waste tea. Activated carbons were prepared by phosphoric acid activation with and without microwave treatment and carbonisation of the waste tea under nitrogen atmosphere at various temperatures and different phosphoric acid/precursor impregnation ratios. The surface properties of the activated carbons were investigated by elemental analysis, BET surface area, SEM, FTIR. Prior to heat treatment conducted in a furnace, the mixture of the waste tea and H3PO4 was treated with microwave heating. The maximum BET surface area was 1157 m2/g for the sample treated with microwave energy and then carbonised at 350 °C. In case of application of conventional method, the BET surface area of the resultant material was 928.8 m2/g using the same precursor and conditions. According to the Dubinin–Radushkevich (DR) method the micropore surface area for the sample treated with microwave energy was higher than the sample obtained from the conventional method. Results show that microwave heating reasonably influenced the micropore surface area of the samples as well as the BET surface area.The samples activated were also characterised in terms of the cumulative pore and micropore volumes according to the BJH, DR and t-methods, respectively.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 87, Issues 15–16, November 2008, Pages 3278–3285
نویسندگان
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