摘要
以废弃的松子壳为原料,采用水蒸气活化法制备松子壳活性炭,系统研究了炭化温度、活化温度、活化时间、活化剂用量等关键工艺因素对活性炭产品性能的影响,分析其对碘吸附值和亚甲基蓝吸附性能的影响。结果显示,松子壳活性炭最佳工艺条件为:炭化温度为500℃、活化温度为860℃、活化时间为90 min、水蒸气流量为2.5 m L/min,此时松子壳活性炭得率为26.08%,碘吸附值为1 338 mg/g,亚甲基蓝吸附值为300 mg/g。松子壳活性炭孔径主要集中在3 nm左右,其平均孔径为2.396 nm,BET比表面积为105 2.68 m^2/g,总孔容积为0.630 6 cm^3/g,微孔容积为0.355 8 cm^3/g,占总孔容积的56.43%。
Activated carbons were prepared by steam activation from wasted pin nut shells,and the main factors including temperature and time were studied on the effects of yield and adsorption properties of the activated carbon. Experimental results indicated that the optimal carbonization temperature for pin nut shells was 500℃ ; the optimum conditions for activation were： 800℃ for the activation temperature, 90 min for the activation time and 2.5 mL/min for the flow rate of steam. Besides,results showed that under the best optimum conditions, the yield of activated carbon was 26.08%, iodine value was l 338 mg/g, methylene blue （MB） adsorption of activated carbon was 300 mg/g. The main pore size of the activated carbon from pine nut shells was around 3 nm, and the average pore size was 2.396 nm. The BET surface area was 1 052.68 m^2/g, the total pore volume was 0.630 6 cm^3/g, and the micropore volume was 0.355 8 cm^3/g, where the amount was 56.43% of the total pore volume.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2017年第3期111-115,共5页
Journal of Central South University of Forestry & Technology
基金
国家十二五科技支撑项目"新型移动固定床制备高品质燃气工业化应用技术集成与示范"(2015BAD21B05)
关键词
松子壳
活性炭
炭化
水蒸气活化
孔结构
pin nut shell
activated carbon
carbonization
steam activation
pore structure
