School of Chemical Engineering, Engineering Campus, Universit Sains Malaysia, 14300 Nibong Tebal, Penang, Malaysia.
Bioresour Technol. 2013 Feb;130:696-702. doi: 10.1016/j.biortech.2012.11.146. Epub 2012 Dec 11.
In this work, preparation of granular activated carbon from oil palm biodiesel solid residue, oil palm shell (PSAC) by microwave assisted KOH activation has been attempted. The physical and chemical properties of PSAC were characterized using scanning electron microscopy, volumetric adsorption analyzer and elemental analysis. The adsorption behavior was examined by performing batch adsorption experiments using methylene blue as dye model compound. Equilibrium data were simulated using the Langmuir, Freundlich and Temkin isotherm models. Kinetic modeling was fitted to the pseudo-first-order, pseudo-second-order and Elovich kinetic models, while the adsorption mechanism was determined using the intraparticle diffusion and Boyd equations. The result was satisfactory fitted to the Langmuir isotherm model with a monolayer adsorption capacity of 343.94mg/g at 30°C. The findings support the potential of oil palm shell for preparation of high surface area activated carbon by microwave assisted KOH activation.
本工作尝试通过微波辅助 KOH 活化法，由油棕生物柴油固体残渣（油棕果壳）制备颗粒状活性炭。采用扫描电子显微镜、体积吸附分析仪和元素分析对油棕果壳的物理化学性质进行了表征。通过使用亚甲基蓝作为染料模型化合物进行间歇吸附实验，考察了吸附行为。采用 Langmuir、Freundlich 和 Temkin 等温吸附模型对平衡数据进行了模拟。采用拟一级、拟二级和 Elovich 动力学模型对动力学模型进行了拟合，而吸附机理则采用内扩散和 Boyd 方程进行了确定。结果与 Langmuir 等温吸附模型拟合良好，在 30°C 下的单层吸附容量为 343.94mg/g。这些发现支持了通过微波辅助 KOH 活化法由油棕果壳制备高比表面积活性炭的潜力。
