膨胀石墨的制备及其对煤炭地下气化煤气冷凝水的净化

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以天然石墨为原料,采用化学氧化-高温膨胀工艺制备膨胀石墨,利用扫描电镜、低温氮气物理吸附仪和红外光谱仪对膨胀石墨的表面形貌、孔结构特征及表面官能团等微观结构进行表征;并系统研究其对内蒙古褐煤地下气化煤气冷凝水中氨氮(NH3-N)和总有机碳(TOC)的吸附净化特性。结果表明,所制膨胀石墨具有片层状三维网络结构,孔隙发达,比表面积可达27.3m2·g^-1,总孔容为0.124cm3·g^-1,孔径主要分布在2~10nm,且其表面含有丰富的羰基、酚羟基等含氧官能团,是一种性能优良的介孔吸附材
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