微波辐照碳酸钾化学活化法制备菌渣活性炭

以食用菌渣为原料,以K2CO3为活化剂,利用微波辐照加热法制备活性炭。采用正交实验设计,研究了活化功率、活化时间、K2CO3与菌渣质量比、浸渍时间对活性炭碘值及得率的影响。实验结果表明,活化时间、活化功率、K2CO3与菌渣质量比对活性炭碘值影响显著,浸渍时间对活性炭碘值影响不显著;对活性炭得率,各因素影响均不显著。综合考虑碘值和得率2个指标,实验得出的最佳活性炭制备工艺条件为:活化功率560 W,活化时间20 min,K2CO3与菌渣质量比0.8,浸渍时间20 h。

Preparation of activated carbon from fungi residue by microwave assisted K2CO3 activation

Activated carbon was prepared from edible fungi residues using microwave assisted K₂CO₃ activation in present study. Orthogonal array design experiments were conducted to investigate the effects of activation power, activation time, K₂CO₃/edible fungi residues (EFRs) ratio and impregnation time on the iodine number and the yield of the activated carbon. The experimental results indicated that the activation power, the activation time and the K₂CO₃/EFRs ratio were significant, whereas the impregnation time was insignificant, for the iodine number of the activated carbon. As regards the yield, none of the four factors were significant. Taking the iodine number and the yield into combined considerations, the optimum preparation conditions of the activated carbon were as follows: activation power of 560 W, activation time of 20 min, K₂CO₃/EFR ratio of 0.8 and impregnation time of 20 h.