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摘要: 以煤炭直接液化工艺过程的副产物——沥青烯为碳源,中孔硅分子筛SBA15为模板,采用模板炭化法制备了具有规则结构的中孔炭。制备过程包括利用溶剂夹带法将沥青烯填充到模板孔道内,炭化模板孔道内的沥青烯以及脱除模板等步骤。利用扫描电镜、透射电镜、粉末X射线衍射仪对产品的微观形貌和结构进行了分析;测定了材料的抗氧化性能、导电性能以及对N2的吸附特性。结果表明:产品具有对模板结构反转复制的规则结构,其比表面积为562m2/g,孔容为0.566cm3/g,孔尺寸呈单分布,平均孔径为3.57nm;此外,材料具有良好的抗氧化性能,空气环境下300℃处理后样品仍保持规则的孔结构形态;其平均电阻率为0.16Ω•cm左右,属半导体材料导电性能范畴。Abstract: Ordered mesoporous carbons (OMCs) were synthesized from asphaltene using a template carbonization method. The OMC material was studied by scanning and transmission electron microscopy, Xray diffraction, N2 adsorption and thermal gravimetric analysis. Results show that the asobtained OMC material with graphitic frameworkconfined ordered structure is a reverse replication of the template, which has a relatively high surface area of 562m2/g,large pore volume of 0.57 cm3/g and narrow pore size distribution centered at 3.57nm. The structure of the OMC is stable at 300℃ in air, showing good thermal stability. Electrical conductivity measurements show that the OMC material has an average electrical resistance of 0.16Ω•cm.
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Key words:
- Asphaltene /
- SBA-15 /
- Template carbonization method /
- Mesoporous carbon
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