Optimal preparation of Pennisetum sinese-based activated carbon with high specific surface area by response surface methodology
The high specific surface area activated carbon was prepared by chemical activation method using Pennis-etum sinese as raw material.The influencing factors such as activation temperature,activation time and alkali-car-bon ratio were explored by response surface analysis method.The optimal preparation conditions of Pennisetum sinese-based activated carbon were determined that the activation temperature was 920℃,the activation time was 50 min,and the alkali-carbon ratio was 4∶1 by model analysis.The actual iodine adsorption capacity of the prepared Pennisetum sinese-based activated carbon was closed to the predicted adsorption capacity,which was proved that the response surface method model optimization analysis results are reliable.The properties of the materials were characterized using BET,IR and SEM,indicating that the Pennisetum sinese-based activated carbon has reached the standard of super activated carbon due to rich surface functional groups and developed pore structure.The suc-cessful preparation of super activated carbon provides a reference for the preparation process parameters and materi-al properties for the development and application of Pennisetum sinese.
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