Kalderis Dimitrios, Bethanis Sophia, Paraskeva Panagiota, Diamadopoulos Evan
Department of Environmental Engineering, Technical University of Crete, 73 100 Chania, Greece.
Bioresour Technol. 2008 Oct;99(15):6809-16. doi: 10.1016/j.biortech.2008.01.041. Epub 2008 Mar 24.
The production of activated carbon from bagasse and rice husk by a single-stage chemical activation method in short retention times (30-60min) was examined in this study. The raw materials were subjected to a chemical pretreatment and were fed to the reactor in the form of a paste (75% moisture). Chemicals examined were ZnCl2, NaOH and H3PO4, for temperatures of 600, 700 and 800 degrees C. Of the three chemical reagents under evaluation only ZnCl2 produced activated carbons with high surface areas. BET surface areas for rice husk were up to 750m2/g for 1:1 ZnCl2:rice husk ratio. BET surface areas for bagasse were up to 674m2/g for 0.75:1 ZnCl2:bagasse ratio. Results were compared to regular two-stage physical activation methods.
本研究考察了采用单阶段化学活化法在短停留时间（30 - 60分钟）内由甘蔗渣和稻壳制备活性炭的过程。原材料经过化学预处理后以糊状物（75%湿度）的形式送入反应器。所考察的化学试剂为ZnCl₂、NaOH和H₃PO₄，反应温度为600、700和800摄氏度。在所评估的三种化学试剂中，只有ZnCl₂制得的活性炭具有高比表面积。对于稻壳，当ZnCl₂与稻壳的比例为1:1时，BET比表面积高达750m²/g。对于甘蔗渣，当ZnCl₂与甘蔗渣的比例为0.75:1时，BET比表面积高达674m²/g。将结果与常规的两阶段物理活化法进行了比较。
