1 – Save your experimental data in a tab delimited text file (*.txt) with two columns: absolute pressure [kPa] and amount adsorbed [cm3/g]. Do not write numerical data in the first line, it is reserved for the name of the units pressure (kPa) and amount adsorbed (cm3/g). Remember: the decimal separator should be dot (.), not comma (,).
2 – A practical approach, to create the text file with the experimental isotherm, is to export your data from the excel spreadsheet. In this case, follow these steps:
2.1 – Open the File menu and select the Save as;
2.2 – In the File Format: drop-down box, select the Tab delimited Text (*.txt) option;
2.3 – Select the Save button. If you see warning messages pop up, select the OK or Yes button.
3 – Fill fields in the website with your name, country, e-mail, kernel, message and attached your file. After that, we will predict the pore size distribution (PSD) with your experimental data and the kernel chosen. The results will be sent to you by e-mail.
Some relevant definitions follow below to facilitate the understanding of the result file:
Pore size – hcc(Å): it is the physical width of the pore, through the centers of all carbon atoms of the outermost layer of one wall to the corresponding plane of the opposite wall.
Simulated adsorption isotherm: Theoretical isotherm of N2 at 77 K from the suggested PSD.
PSD (pore size distribution) (cm3/g Å): the pore structure of porous materials. the psd is computationally determined through the deconvolution of a kernel of simulated isotherms using an experimental probe-gas isotherm.
Accumulated pore volume (cm3/g): the partial sums of the pore volume increments only up to a pore width hcc(Å) plotted in dependence on the pore diameter.
Micropore pore volume (hcc <20 Å) (cm2/g): the micro-pore volume can be evaluated from a standard adsorption isotherm of N2 at 77 k.
Total pore volume (cm3/g): volume of pores determined by stated method (experimental or from simulated data).
Specific surface area (m2/g): surface area of unit mass of powder, as assessed under stated conditions.
Histogram: organized data to histogram plot, pore size versus pore size distribution.
h (Å) — psd (cm3/g Å).