CHARACTERIZATION OF 3A MOLECULAR SIEVE USING TRISTAR MICROMERITICS DEVICE

Equilibrium adsorption was studied for nitrogen and carbon dioxide on 3A molecular sieve zeolite at constant temperature by using a new advanced device, called TriStar Micromeritics. In this regard, TriStar II 3020 (licensed by Micromeritics Company) was used for characterizing the desired 3A molecular sieve. Results demonstrated that the BET isotherm was suitable for fitting equilibrium data of nitrogen adsorption on the 3A molecular sieve. But, Langmuir isotherm had no ability to predict the equilibrium data correctly. However, other isotherms such as Langmuir-Freundlich could be more useful and suitable to predict multilayer adsorption capability of zeolite 3A molecular sieve in nitrogen adsorption. The experiments also showed that 3A molecular sieve zeolite had more affinity with nitrogen than carbon dioxide at selected temperature which varies for each of them. Additionally, it was confirmed that there were extended macropore and mesopore distribution inside the shaped product to regulate the CO2 adsorption of the 3A molecular sieve. Although general procedure for forming the powder of 3A molecular sieves has been reported, this research proposed burning organic materials to produce the extended macropores

کلیدواژه ها:

3A molecular sieve ، Adsorption ، TriStar II ، Zeolite