DETERMINATION OF THE CONNECTIVITY OF POROUS SOLIDS FROM NITROGEN SORPTION MEASUREMENTS
DETERMINATION OF THE CONNECTIVITY OF POROUS SOLIDS FROM NITROGEN SORPTION MEASUREMENTS
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DOI：
10.1016/0009-2509(91)80151-n
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发表时间：
1991-01-01
影响因子：
4.7
通讯作者：
SEATON, NA
中科院分区：
文献类型：
--
作者：
SEATON, NA
提出了一种通过分析氮吸附测量值来确定多孔固体（如吸附剂和催化剂载体）连通性的方法。 新方法是基于使用逾渗理论来分析吸附滞后。 对于给出国际纯粹与应用化学联合会（IUPAC）类型H1和H2的滞后回线的固体，通过检测和量化解吸等温线中的渗滤转变来确定孔网络的平均配位数。 对于H3型磁滞回线，得到的平均配位数的上限，虽然对于某些固体，这个界限是太高，是有用的。 不能从类型H4磁滞回线获得连接性信息。 该分析方法具有耐用性，可常规应用。
A method is proposed for the determination of the connectivity of porous solids, such as adsorbents and catalyst supports, from the analysis of nitrogen sorption measurements. The new method is based on the use of percolation theory to analyse sorption hysteresis. For solids giving hysteresis loops of the International Union of Pure and Applied Chemistry (IUPAC) types H1 and H2, the mean coordination number of the pore network is determined by detecting and quantifying a percolation transition in the desorption isotherm. For type H3 hysteresis loops, an upper bound is obtained for the mean coordination number, although for some solids this bound is too high to be useful. No connectivity information can be obtained from the type H4 hysteresis loop. The analysis method is robust and can be applied routinely.