Adsorption near Ambient Temperatures of Methane, Carbon Tetrafluoride, and Sulfur Hexafluoride on Commercial Activated Carbons

Adsorption equilibrium of sulfur hexafluoride on multi-walled carbon nanotubes

“…All Q o st were in the range of 70-272 kJ/mol, which is significantly higher than the values reported for physical adsorption of VOCs by conventional carbon materials. A high Q o st value of 41.5 kJ/mol was also reported for the case of SF 6 adsorption on a molecular sieving carbon [16]. The interactions between a graphitic carbon surface and an adsorbed molecule would increase as the surface becomes highly curved [30].…”

“…Compared to other adsorbents in the literature [13][14][15][16][17][18], the MWNTs should be a promising candidate as adsorbents for SF 6 adsorption. It is clear that the adsorbed amount decreased with increasing temperature, indicative of exothermic adsorption.…”

“…However, the carbonaceous adsorbents seemed to show a better performance for SF 6 adsorption [14]. The carbon black, activated carbons, carbon fabric and pillared clays have been used as adsorbents for SF 6 adsorption in the literature, and the SF 6 uptakes of as high as 800 mg/g of activated charcoal were observed [15][16][17][18].…”

Study of Water Adsorption on Activated Carbons with Different Degrees of Surface Oxidation

“…Equation [1] was successfully applied to several adsorption isotherms over a wide range of pressures using relatively low values of m and n (7,(41)(42)(43). It can be seen from Fig.…”

Analysis of Silica Surface Heterogeneity Using Butane and Butene Adsorption Data

“…n (12,(14)(15)(16). However, due to the numerical instability of A convenient way to calculate Q st from isotherms mea-higher order polynomials, this equation may only be used sured at different temperatures is by using a virial-like equa-for certain shapes of isotherms whose accurate fit does not tion (12,13), require polynomials of higher order.…”