Activated carbon from Myrica rubra (Chinese bayberry) stones using steam preparation and its adsorption capabilities
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摘要: 以杨梅Myrica rubra核为原料制备活性炭,采用水蒸汽活化法制备杨梅核活性炭的优化工艺条件为:活化温度950 ℃,活化时间1.5 h,水蒸气用量6 mLg-1。在该条件下,杨梅核活性炭的得率为34.2%,碘吸附值达1 167.2 mgg-1,亚甲基蓝吸附值达132.0 mgg-1。活化温度对杨梅核活性炭的得率和吸附能力都有显著影响(P<0.05);活化时间只对得率有显著影响(P<0.05),对吸附能力影响不显著;水蒸汽用量对得率和吸附能力均无显著影响。杨梅核活性炭对甲醛、苯、氨气、三氯甲烷等4种有毒气体的吸附能力依次为:甲醛>三氯甲烷>苯>氨气。图2表5参7Abstract: Steam activation was used to prepare activated carbon from Myrica rubra(Chinese bayberry) stones. An orthogonal test with three factors and three levels was set:(1) activation temperature of 850,900 and 950 ℃;(2) activation time of 1.5,20 and 2.5 h;(3) steam comsumption of 4,5 and 6 mLg-1. And adsorption capabilities of M. rubra stone carbon for benzene,formaldehyde,ammonia and chloroform were measured. The data were analyzed by ANOVA. The results showed that optimal conditions for activation were:temperature of 950 C,time of 1.5 h,and steam consumption of 5 - 6 mLg-1 of M. rubra stone carbon. With these optimized conditions activated carbon from prepared bayberry stones had a 34.2% yield with iodine adsorption of 1 167.2 mgg-1 and methylene blue of 132.0 mgg-1. For activated carbon from M. rubra stones,activation temperature significantly(P<0.05) decrease yield and increase adsorption abilities,whereas activation time only significantly decreased (P<0.05) yield. M. rubra stone carbon also adsorbed toxic gases with formaldehyde>chloroform>benzene>ammonia.[Ch,2 fig. 5 tab. 7 ref.]
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Key words:
- forest engineering /
- Myrica rubra stones /
- activated carbon /
- steam activation /
- adsorption properties
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2010.03.024
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