Investigation of variation in shale gas adsorption capacity with burial depth: Insights from the adsorption potential theory

2020 ◽  
Vol 73 ◽  
pp. 103043 ◽  
Author(s):  
Hexin Huang ◽  
Rongxi Li ◽  
Zhenxue Jiang ◽  
Jian Li ◽  
Lei Chen
Keyword(s):  
Adsorption Capacity ◽  
Potential Theory ◽  
Shale Gas ◽  
Gas Adsorption ◽  
Burial Depth ◽  
Adsorption Potential ◽  
Adsorption Potential Theory

scholarly journals Application of adsorption potential theory in prediction of CO2 and CH4 adsorption on carbon molecular sieves

2018 ◽  
Vol 36 (9-10) ◽  
pp. 1669-1686
Author(s):  
Xue Song ◽  
Li’ao Wang ◽  
Yifu Li ◽  
Yunmin Zeng ◽  
Xinyuan Zhan ◽  
...  
Keyword(s):  
Potential Theory ◽  
Molecular Sieves ◽  
Gas Adsorption ◽  
Characteristic Curve ◽  
Empirical Method ◽  
Adsorption Potential ◽  
Adsorption Characteristic ◽  
Carbon Molecular Sieves ◽  
Adsorbed Phase ◽  
Adsorption Potential Theory

The adsorption of CO2 and CH4 on carbon molecular sieves was studied based on the adsorption potential theory, which is widely used in gas adsorption on microporous adsorbents. The methods to obtain the adsorption density in the adsorbed phase, including Ozawa’s method and the empirical method, and the methods to calculate the virtual saturation vapor pressure, including Dubinin’s method and Amankwah’s method, were discussed. A functional exponential form proposed in this study could describe the adsorption characteristic curve better than the cubic polynomial and logarithmic function used in the previous literature. A new model, which expresses the correlation of adsorbed amount, temperature, and pressure, was proposed and verified experimentally. The model provides a reliable way to predict the adsorption isotherms of CO2 and CH4 on carbon molecular sieves at different temperatures according to the data measured at a certain temperature and to select a proper kind of carbon molecular sieve in CO2/CH4 separation.

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