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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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活性炭孔结构的混合碱改性
DOI: 10.3969/j.issn.1671-7627.2012.03.010, PP. 51-55
Keywords: 活性炭,孔结构,吸附
Abstract:
具有较大比表面积的且以微孔孔隙居多的活性炭对气体小分子具有较好的吸附性能,以椰壳活性炭为原料、koh/naoh为活化扩孔剂,考察了温度、时间以及koh与naoh的质量比对活性炭孔隙结构的影响,使用n2在77k下对产品活性炭进行表征测试。表征结果表明,当m(kho):m(naoh)为4:1、溶液浓度为50%时,活性炭在600℃下活化4h所得的活性炭产品平均孔径最大。对比hk模型和dft模型对微孔活性炭孔径分布的分析结果,表明dft模型更符合实际情况。经过孔结构改性的活性炭对ch4与co2吸附能力均有提高。
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