n Saeidi - School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran
m Parvini - School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran
m.r Sarsabili - School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran

MCM-41 particles were synthesized using inorganic raw materials and Cetyltrimethylammoniumbromide (CTAB). The textural properties and structure of MCM-41 particles were characterized by Xraydiffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM)and N2 adsorption-desorption methods. To study performance of Dubinin-Astakhov and Dubinin-Raduchkevic isotherm models in evaluating mesopore volume and pore size of MCM-41, the mesoporevolume and pore size of several MCM-41 samples were calculated by means of the two- mentionedisotherm models and by utilizing N2 adsorption isotherms and XRD data. The results were comparedwith the mesopore volume and pore size calculated by other methods. The results showed that thecalculated mesopore volume and pore size on the samples with the fraction of mesopore volume > 0.9had not good consistency with XRD data and the results obtained by other methods. However, thecalculated mesopore volume and pore size on the samples with the fraction of mesopore volume . 0.9were in good agreement with XRD data and other advanced simulation techniques.

Nitrogen Isotherm Data,MCM-41Dubinin-astakhov and Dubinin-RaduchkevicEquationsNanopore (Mesopore) VolumePore Size