These results are represented in terms of the equilibrium and dynamic characteristics of methane adsorption on three well known metal organic frameworks (MOFs), namely MIL-101(cr), HKUST-1 and MOF-F300.
In addition, the isosteric heat of adsorption of methane in chlorite pores with different pore sizes was less than 42 kJ/mol, demonstrating that the methane adsorption on chlorite is of the physical adsorption type.
Experimentally, Ji et al. (2012a, b) found that the average isosteric heat of methane adsorption on chlorite was 9.4 kJ/mol.
It can be seen that the methane excess adsorption capacity decreased with increasing temperature under the same pressure; this may be due to methane adsorption on chlorite being of the physical adsorption type.
This conclusion is in agreement with a previous study of methane adsorption on montmorillonite (Jin and Firoozabadi 2013, 2014), indicating that water reduced the methane adsorption capacity on montmorillonite.
However, this value comprehensively reflects the specific surface area of chlorite and the value of the adsorption amount per unit surface area and cannot fundamentally reflect the essence of microscopic adsorption mechanisms of the methane adsorption on the chlorite owing to the results obtained for the macroscopic behaviour.
Using the GCMC method, Sun et al. (2015) performed research on the methane adsorption behaviours of different types of clay minerals (montmorillonite, illite and kaolinite) and also studied the effects of different temperatures on the methane adsorption behaviours.
While slightly smaller than that of pristine graphene, the methane adsorption energy of defected graphene is also increased with the number of layers.
Methane adsorption capacity of coal is one of the major factors influencing total gas-in-place and it is linked to coal structure, while our knowledge of it is still limited.
