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    郑淑娴, 汪仁. 色谱法测定低比表面积的研究——低温动态氪吸附法[J]. 华东理工大学学报(自然科学版), 1988, (3).
    引用本文: 郑淑娴, 汪仁. 色谱法测定低比表面积的研究——低温动态氪吸附法[J]. 华东理工大学学报(自然科学版), 1988, (3).
    Gas chromatographic measurement of low specific surface area by dynamic adsorption of krypton at low temperature[J]. Journal of East China University of Science and Technology, 1988, (3).
    Citation: Gas chromatographic measurement of low specific surface area by dynamic adsorption of krypton at low temperature[J]. Journal of East China University of Science and Technology, 1988, (3).

    色谱法测定低比表面积的研究——低温动态氪吸附法

    Gas chromatographic measurement of low specific surface area by dynamic adsorption of krypton at low temperature

    • 摘要: 以氪为吸附质,进行了文题的研究。结果表明:当样品管容积小于15cm~3时,在BET相对压力范围内热扩散效应可以忽略;试样的表面积小于0.5m~2对,20分钟即能达到吸附平衡;比表面积为0.01—5m~2/g的试样都能得到接近高斯分布的峰形,不出现反常峰,具有良好的BET直线。

       

      Abstract: Krypton was used as adsorbent to measure low specific surface area by dynamic adsorption at low temperature. The results showed that: when the volume of the sample tube is less than 15cm~3, the effect of thermal diffusion can be neglected in the range of BET relative pressure. When the total surface area of the sample is less than 0.5m~2, it takes twenty minutes to reach adsorption equilibrium. The peak shape would take the form of Garssion distribution curve, and abnormal signals would not occur for the samples having 0.05 to 5m~2/g specific surface area, Experimental, data perfectly fit the BET equation.

       

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