Lysenko N. Structural-sorption properties of carbon mesoporous molecular sieves obtained by matrix carbonization

It was shown that the region of template structure formation of MCM-48 in the system CTAB-TEOS-NaOH-H2O can be substantially extended due to ripening of silicon-organic gel at relatively high temperature (50-80 °C). It was shown that development of microporous structure takes place to highest degree (to 0,15-0,16 cm3/g) under the condition of carbonization of polyphenolformaldehyde and polydivynylbenzene in the matrices SBA-15 and KIT-6 (samples of CMMS CMK-3 and CMK-8 type respectively), and substance with the most developed surface is formed during carbonization of sucrose (CMK-8, Smezo = 1390 m2/g), maximal adsorption capacity for hydrogen at the level of 1,4 mas. % (77 К, 1 atm) was achieved. On the basis of analysis of density of mesopores surface filling by hydrogen the increase of adsorption capacity toward hydrogen of surface of CMMC with promoted graphitization degree. It was shown that the maximal increase of porosity (Vmicro+supermicro = 0,20 cm3/g, Vmeso = 1,79 cm3/g) and specific surface area (SBET = 2355 m2/g) is observed during the process of termosteam treatment and results in considerable growth of hydrogen adsorption (1,20 mas. % before activation and 2,23 mas. % after activation, 77 K, 1 atm). It testifies the possibility of use of the applied approach for creation on the basis of CMMS effective adsorbents, including, composite, for saving of hydrogen.