| Abstract: | The influence of a pore in a solid on the energy state of gas-phase molecules in terms of various models was revealed and the configuration of the relevant force fields was studied. It was shown that the energy predicted by these models for a gas molecule in the pore might be both higher and lower than its energy in the surroundings. The effect of the pore wall thickness on the configuration of the pore energy field was examined. Expressions were derived that make it possible to determine the force acting on gas molecules both in the pore and at each point of the surroundings. On this basis, the plot of the corresponding force field was constructed, a representation that leads to the conclusion that forces parallel to the pore axis act at the entrance to and the exit from the pore and that radial forces operate in the main body of the internal volume. The effect of an external solid surface on the pore force field was investigated. It was shown that this factor makes it possible to eliminate the energy threshold at the pore outlet under certain conditions, thereby opening new opportunities for using systems of this type in gas separation processes. |
