Bibliographic Details
| Title: |
An Improved Isothermal Adsorption Equation of Gaseous Molecules Under Low Pressure in Gas-Solid System. |
| Authors: |
Bian, Liujiao1 bianliujiao@sohu.com, Shi, Penghui1 |
| Source: |
Journal of Phase Equilibria & Diffusion. Apr2018, Vol. 39 Issue 2, p117-128. 12p. 1 Diagram, 5 Charts, 5 Graphs. |
| Subject Terms: |
*LOW pressure (Science), *THERMODYNAMIC equilibrium, *GAS phase reactions, *GAS-solid interfaces, *LANGMUIR isotherms |
| Abstract: |
Based on the thermodynamic equilibrium between gas phase and adsorbed phase in gas-solid system, an isothermal adsorption equation (Eq 12) was presented to illustrate the dependence of the amount of gas molecules adsorbed on the adsorbents upon the gaseous pressure under low pressure. Under different conditions of surface properties, this equation can be simplified to Eqs 15 and 33, the simplified equations are formally in agreement with the famous Langmuir and Freundlich adsorption equations, respectively. From this equation, it can be theoretically proved that when the surface of adsorbents is highly heterogeneous, the adsorption data can be described only by Eq 33; while when the surface of adsorbents is homogeneous or approximately homogeneous, the adsorption data can be described simultaneously by Eqs 33 and 15. In addition, it is further inferred that Eq 15 can be used to describe the adsorption data in either exothermic or endothermic process, while the Eq 33 can be used to describe the adsorption data only in exothermic process. The equation was tested with many adsorption data in literature, the results showed this equation can be used to describe the adsorption data well under low pressure and the theoretical predictions were consistent with the practical application. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Phase Equilibria & Diffusion is the property of Springer Nature and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| Database: |
Academic Search Complete |
|
Full text is not displayed to guests. |
Login for full access.
|
