کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
690581 1460415 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Comparative study of naphthalene adsorption on activated carbon prepared by microwave-assisted synthesis from different typical coals in Xinjiang
ترجمه فارسی عنوان
بررسی مقایسه ای جذب نفتالین بر کربن فعال تهیه شده با استفاده از سنتز مایکروویو از زغال سنگ معمولی در سین کیانگ
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تکنولوژی و شیمی فرآیندی
چکیده انگلیسی


• Carbon adsorbents were obtained by microwave activation.
• Naphthalene was effectively adsorbed by all three CAC samples.
• The adsorption kinetics fits very well to the pseudo-second-order model.
• Among the three coals, A-coal is the most suitable precursor.

Coal-based activated carbons (CACs) prepared from anthracite (A) coal, bituminous (B) coal, and long flame (L) coal (i.e., ACAC, BCAC, and LCAC) from Xinjiang, China, using KOH as activating reagent, were investigated under various microwave radiation power levels. The results show that the adsorption capacity of the obtained activated carbons (prepared under the optimum power level) toward naphthalene follows the order: ACAC > BCAC > LCAC. In addition, the textural properties of the CACs were investigated by means of SEM and low-temperature N2 adsorption. The surface chemistry features of the CACs were investigated by XPS, FTIR spectroscopy and Boehm's titration method. ACAC has a higher surface area, pore volume, and zero point charge (pHPZC) than the BCAC and LCAC, while acidic oxygen functional group of the ACAC is lower than that of BCAC and LCAC. In addition, the adsorption of naphthalene from the aqueous solution on the CACs could be favorably described by the Freundlich isotherm. The adsorption kinetics fits very well to the pseudo-second-order model. Among the three coals, A-coal was the best material having low ash content and less than 10% volatile content, which is beneficial for the preparation of CAC using microwave -assisted synthesis for naphthalene adsorption.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the Taiwan Institute of Chemical Engineers - Volume 59, February 2016, Pages 563–568
نویسندگان
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