| 高比表面积煤质活性炭的制备与活化机理 |
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| 引用本文： | 王秀芳,田勇,张会平.高比表面积煤质活性炭的制备与活化机理[J].化工学报,2009,60(3):733-737. |
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| 作者姓名： | 王秀芳 田勇 张会平 |
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| 作者单位： | 广东药学院药科学院;华南理工大学化学与化工学院 |
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| 基金项目： | 国家自然科学基金项目(50802017)~~ |
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| 摘 要： | 以煤为原料，采用KOH活化法制备了高比表面积活性炭，分别考察了活化温度、浸渍比和活化时间等工艺参数对活性炭吸附性能的影响；测试了高比表面积活性炭在-196℃对N2的吸附等温线、比表面积和孔径分布。结果表明，当活化工艺参数为活化温度900℃，浸渍比4，活化时间1.5 h的条件下可以制得较好的高比表面积活性炭产品，其比表面积为3135 m2·g-1，孔容为1.72 cm3·g-1，碘吸附值为2657 mg·g-1；采用扫描电子显微镜观察了高比表面积活性炭的微观结构，采用气体分析仪检测了活化过程中的尾气成分，提出了高比表面积活性炭的活化机理。
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| 关 键 词： | 比表面积 活性炭 活化机理 |
| 收稿时间： | 2008-10-6 |
| 修稿时间： | 2008-12-17
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Preparation and activation mechanism of high specific surface area coal-based activated carbon |
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| WANG Xiufang,TIAN Yong,ZHANG Huiping.Preparation and activation mechanism of high specific surface area coal-based activated carbon[J].Journal of Chemical Industry and Engineering(China),2009,60(3):733-737. |
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| Authors: | WANG Xiufang TIAN Yong ZHANG Huiping |
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| Affiliation: | 1School of Pharmacy;Guangdong Pharmaceutical University;Guangzhou 510006;Guangdong;China;2School of Chemical and Chemical Engineering;South China University of Technology;Guangzhou 510640;China |
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| Abstract: | High specific surface area activated carbons were prepared from coal by KOH activation in flowing nitrogen. The influences of activation temperature，impregnant ratio and activation time on the adsorption capacity were investigated. Nitrogen adsorption isotherms at -196℃，specific surface area and pore distribution of high specific surface area activated carbon were measured. The results showed that high specific surface area activated carbon with high quality could be prepared at an activation temperature of 900℃，an impregnant ratio of 4 and an activation time of 1. 5 h. The specific surface area，pore volume and adsorption iodine values of activated carbon at optimized parameters were 3135 m2·g-1，1.72 cm3·g-1 and 2657 mg·g-1，respectively. Microstructures of high specific surface area activated carbons were observed with scanning electron microscopy（SEM）. Off-gas released during the activation process was detected and analyzed by SWG300 gas analyzer. The mechanism of preparation of activated carbon from coal by KOH activation was proposed. |
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| Keywords: | specific surface area activated carbon activation mechanism |
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