This paper analyses the effect of an adsorbed layer of variable curvature during the course of adsorption. To this end the capillary condensation and evaporation verified in pores endowed with elliptical geometry is studied. An adsorption potential within the pore walls is defined and it is numerically derived in accordance with the curvature of the pores and the attraction between the adsorbate and solid molecules. By using the Broekhoff de Boer approach, the condensation and evaporation conditions were calculated in two types of elliptical pores, prolates and oblates. The nitrogen adsorption isotherms, for ink-bottle pores, are presented and discussed. Also, an analysis of the values of the thickness of the condensed layer on the surface of the elliptical pores is carried out. Both the variation of the curvature of the liquid–gas interface and the surface tension result as the most important features that direct the course of the adsorption process.

中文翻译：

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椭圆孔吸附过程中曲率的影响：在Broekhoff de Boer近似框架下的研究

本文分析了吸附过程中曲率可变的吸附层的影响。为此，研究了椭圆形孔中的毛细管凝结和蒸发。确定了孔壁内的吸附势，并根据孔的曲率和被吸附物与固体分子之间的吸引力从数值上推导。通过使用Broekhoff de Boer方法，可以在两种类型的椭圆形孔（扁长形和扁圆形）中计算冷凝和蒸发条件。提出并讨论了用于墨水瓶孔的氮吸附等温线。另外，对椭圆孔的表面上的缩合层的厚度的值进行分析。