Optimization of Synthesis Procedure for NaX Zeolite by Taguchi Experimental Design and its Application in CO2 Adsorption

Anbia, M.; Mohammadi Nejati, F.; Jahangiri, M.; Eskandari, A.; Garshasbi, V. Garshasbi2

Optimization of Synthesis Procedure for NaX Zeolite by Taguchi Experimental Design and its Application in CO2 Adsorption

Document Type : Original Research Articles

Authors

M. Anbia ¹

F. Mohammadi Nejati ²

M. Jahangiri ²

A. Eskandari ²

V. Garshasbi2 Garshasbi ²

¹ Research Laboratory of Nanoporous Materials, Faculty of Chemistry, Iran University of Science and Technology, Narmak, Tehran 16846-13114, Islamic Republic of Iran

² Faculty of Chemical, Petroleum and Gas Engineering, Semnan University, Semnan, Islamic Republic of Iran

Abstract

A series of experiments were designed to utilize the Taguchi method for investigating the effects of important parameters on the synthesis of NaX zeolite and to find the best conditions of synthesis. An L9 orthogonal design of Taguchi approach was applied to design experiments consisting of 9 trails. The effect of molar composition, including SiO₂/Al₂O₃ and Na₂O/Al₂O₃ ratios, and the crystallization conditions, including temperature (T) and time (t) on crystallinity and also phase purity of NaX zeolite were investigated. The results revealed that the temperature of crystallization and alkalinity (Na₂O/Al₂O₃) of initial mixture were the most influencing parameters for desirable synthesis of NaX zeolite. To examine the validation the result of Taguchi experiment design, the most crystalline sample was resynthesized and characterized by XRD, SEM and N₂ adsorption-desorption methods. At the end, the capability of the obtained sample for CO₂ adsorption was determined by the static volumetric method.

Keywords

CO2 adsorption

NaX zeolite

Taguchi experimental design

Volumetric gas adsorption

Zeolite synthesis