摘要
研究了以竹节及其炭化料为原料,采用微波辐射氯化锌法和水蒸气法制备活性炭的可行性。探讨了微波功率、活化时间、活化剂浓度及水蒸气流量对活性炭性能的影响。得到了微波辐射竹节废料制备活性炭的最佳工艺条件:水蒸气法的最佳条件为微波功率700W、活化时间7min、水蒸气流量3.1mL/min。用此工艺条件制得的活性炭碘吸附值1012.2mg/g、亚甲基蓝脱色率165mL/g、得率52.3%。该工艺所需活化时间为传统方法的1/45左右,得率为传统方法的2倍左右。氯化锌法的最佳条件为微波功率350W、活化时间5min、氯化锌质量分数40%。用此工艺条件制得的活性炭碘吸附值1088.4mg/g、亚甲基蓝脱色率220mL/g、得率39.2%。该工艺所需活化时间为传统方法的1/36,产品活性炭亚甲基蓝脱色率为国家一级标准的1.83倍(GB/T12496.10-1999)。
Feasibility of activated carbon preparation from bamboo knot by microwave radiation was studied.Effects of microwave power,activation time,ZnCl2 solution concentration and flow rate of water vapor on the quality of activated carbon was investigated.The optimum technology of activated carbon preparation with water vapor activation by microwave radiation was obtained as follows:microwave power 700 W,activation time 7 min,flow rate of water vapor 3.1 mL/min.Activated carbon was prepared with iodine value 1 012.2 mg/g,decoloring capacity for methylene blue 165 mL/g and yield 52.3%.Activation time was 1/45 and yield of activated carbon was twice as that of the conventional process respectively.The optimum technology of activated carbon preparation with ZnCl2 activation by microwave radiation was obtained as follows:microwave power 350 W,activation time 5 min,ZnCl2 solution mass parts 40%.Activated carbon was prepared with iodine value 1 088.4 mg/g,decoloring capacity for methylene blue 220 mL/g and yield 39.2%.Activation time was 1/36 of the conventional process.The decoloring capacity for methylene blue was 1.83 times of that of the first grade product specified in the National Standard(GB/T 12496.10-1999).
出处
《林产化学与工业》
EI
CAS
CSCD
2003年第3期56-60,共5页
Chemistry and Industry of Forest Products
基金
国家自然科学基金资助项目(20167001)
昆明理工大学学生课外科技创新基金资助项目
