Relation between adsorption potential distribution and pore volume distribution for microporous carbons

Comparing the porosity and surface areas of coal as measured by gas adsorption, mercury intrusion and SAXS techniques

“…However, the application of the H-K method is only suited for micropore PSD. Both Jaroniec et al [49] and Kowalczyk and co-workers [50] have demonstrated the reliability of the H-K method experimentally and numerically for microporous carbons and other solid materials respectively. The surface areas from the N 2 adsorption were evaluated from different methods including: BET, Langmuir and Barrett-Joyner-Halenda (BJH) methods.…”

“…The maximum micropore volume, the average micropore diameter, and the pore size distribution (PSD) of the samples were determined from the CO 2 adsorption results following the H-K method [46,[48][49][50]. The calculations were based on the entire isotherms within the reduced pressure ranges.…”

Monitoring Changes in Surface and Structural Properties of Porous Carbons Modified by Different Oxidizing Agents

“…In the case of active carbons, adsorption potential distributions (APD) seem to be more useful for monitoring their surface and structural properties. APD is a simple derivative of the amount adsorbed with respect to the adsorption potential taken with minus sign (31)(32)(33). The latter is defined as ϪRT ln ( p/p o ), where p/p o is the relative pressure, T is the absolute temperature and R is the universal gas constant and represents the change in the Gibbs free energy taken with a minus sign (31).…”

Physico-chemical methods for the chromatographic materials heterogeneity evaluation

“…The latter one is used here since it was found to be less affected by experimental noise and to produce more reliable results. A good description of the calculation of adsorption energy distribution functions is given in the literature [42,51].…”