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竹炭制备工艺的比较 被引量:10

Comparison of Preparation Technology of Bamboo Charcoal
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摘要 比较研究了竹炭一步法与两步法制备工艺。考察比较了炭化温度、炭化时间对竹炭得率、碘吸附值与电阻率的影响,并用扫描电镜表征了竹炭的结构特征。结果表明,相同炭化条件下,一步法竹炭得率较两步法高,碘吸附值与电阻率较两步法低;两步法竹炭具有较高的孔隙率。一步法与两步法竹炭较佳制备工艺条件为炭化温度900℃、炭化时间4h,其得率分别为24.37%与23.80%,碘吸附值分别为265与364mg/g,电阻率分别为4.37与5.17Ω.cm。 Bamboo charcoals were prepared using one-step or two-step carbonization method under various carbonization tempera- tures and times. The yield, iodine number and electrical resistivity of the obtained charcoals were measured and their structures were observed by scanning electron microscope (SEM) in order to elucidate the effects of preparation methods on the properties of bamboo charcoal. Results showed that the charcoal yield by the one-step method was higher than that by the two-step method, whereas their iodine number and electrical resistivity were lower. The optimal carbonization temperature and time to prepare bamboo charcoal were 900 ℃ and 4 h, independently of the carbonization method. In this case, charcoal yield, iodine number and electrical resistivity of bamboo charcoal by one-step method and two-step method were 24.37 % and 23.80 % , 265 and 364 mg/g, 4.37 and 5.17 Ω·cm, respectively.
出处 《生物质化学工程》 CAS 2010年第2期5-8,共4页 Biomass Chemical Engineering
基金 "十一五"国家科技支撑计划资助(2006BAD19B06)
关键词 竹炭 得率 碘吸附值 电阻率 bamboo charcoal yield iodine number electrical resistivity
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