The penetration of mercury and capillary condensation in packed spheres
The penetration of mercury and capillary condensation in packed spheres
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填充球体内汞的渗透和毛细管冷凝
DOI：
10.1039/tf9585401758
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发表时间：
1958
影响因子：
--
通讯作者：
S. Kruyer
中科院分区：
文献类型：
--
作者：
S. Kruyer
发展了汞在均匀球体填料中的渗透和回缩理论。预测了磁滞现象。穿透分支相当于毛细管凝结中的解吸分支。在毛细管冷凝过程中，收缩支链相当于吸附支链。测量了3个直径为1~0~2 mm的玻璃球和d=0.794×0.002 mm的不锈钢球在填料中的穿透和回缩。实验结果与理论是一致的。为了通过测量汞的渗透性或毛细凝结来确定多孔物质的孔径分布，通常假设孔隙空间相当于一个圆形毛细管系统。正如许多作者指出的那样，1~2%3这一假设是高度人为的。特别是如果多孔物质是由非多孔的、或多或少的球形颗粒凝聚而成的，这个假设将与现实相去甚远。在这种情况下，人们可能会认为，球体堆积的相互连接的空间将给出一个更好的近似于实际的孔隙空间。为此，对汞在均匀球体填料空腔内的渗透和毛细冷凝进行了理论研究。为了验证这一理论，测量了汞在玻璃球和不锈钢球填料中的渗透率。
The theory of mercury penetration and retraction in packings of uniform spheres has been developed. Hysteresis is predicted. The penetration branch is equivalent to the desorption branch in capillary condensation. The retraction branch is equivalent to the adsorption branch in capillary condensation. The penetration and retraction in packings of three samples of glass spheres with diameters between 1 and 0-2 mm and of stainless steel balls (d= 0.794 f 0.002 mm) was measured. The experimental results are in agreement with theory.To find the pore-size distribution of a porous substance from measurements of the penetration of mercury or capillary condensation the pore-space is generally assumed to be equivalent to a system of circular capillaries. As pointed out by many authors, 1~ 2% 3 this assumption is highly artificial. Especially if the porous substance is prepared by agglomeration of non-porous, more or less spherical particles, the assumption will be far from real. In such a case one may expect that the interconnected porespace of a packing of spheres will give a much better approximation to the actual pore-space. Therefore, a theoretical study of the penetration of mercury and capillary Condensation in the cavities of packings of uniform spheres was made. The penetration of mercury into packings of glass spheres and stainless steel balls was measured to test the theory.