Prakash Kumar B G, Shivakamy K, Miranda Lima Rose, Velan M
Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600025, India.
J Hazard Mater. 2006 Aug 25;136(3):922-9. doi: 10.1016/j.jhazmat.2006.01.037. Epub 2006 Feb 28.
Activated carbon was produced from a biowaste product, rubberwood sawdust (RWSD) using steam in a high temperature fluidized bed reactor. Experiments were carried out to investigate the influence of various process parameters such as activation time, activation temperature, particle size and fluidising velocity on the quality of the activated carbon. The activated carbon was characterized based on its iodine number, methylene blue number, Brauner Emmet Teller (BET) surface area and surface area obtained using the ethylene glycol mono ethyl ether (EGME) retention method. The best quality activated carbon was obtained at an activation time and temperature of 1h and 750 degrees C for an average particle size of 0.46 mm. The adsorption kinetics shows that pseudo-second-order rate fitted the adsorption kinetics better than pseudo-first-order rate equation. The adsorption capacity of carbon produced from RWSD was found to be 1250 mg g(-1) for the Bismark Brown dye. The rate constant and diffusion coefficient for intraparticle transport were determined for steam activated carbon. The characteristic of the prepared activated carbon was found comparable to the commercial activated carbon.
活性炭由生物废弃物橡胶木锯末（RWSD）在高温流化床反应器中通过蒸汽制备而成。进行了实验以研究各种工艺参数，如活化时间、活化温度、粒径和流化速度对活性炭质量的影响。基于碘值、亚甲蓝值、布鲁诺尔-埃米特-特勒（BET）表面积以及使用乙二醇单乙醚（EGME）保留法获得的表面积对活性炭进行了表征。对于平均粒径为0.46 mm的情况，在活化时间1小时和活化温度750℃时获得了质量最佳的活性炭。吸附动力学表明，准二级速率比准一级速率方程更能拟合吸附动力学。发现由RWSD制备的碳对俾斯麦棕染料的吸附容量为1250 mg g⁻¹。测定了蒸汽活化碳的颗粒内扩散速率常数和扩散系数。发现制备的活性炭特性与商业活性炭相当。
