Preparation Of Highly Selective Zeolite Topology Molecular Sieve For Adsorption Application

Zeolite topology molecular sieve is a kind of multi-functional adsorbent material, with large surface area and high porosity. Due to their crystal chemical properties and unique internal structures, Zeolite topology molecular sieve has selective adsorption, ion exchange, catalysis, acid-resistant and radiation-resistant performance. They have been rapidly developing, both in physics research fields and in the practical application fields. In recent years, zeolites are widely used in petrochemical, soil improvement, sewage treatment, metallurgy, medicine, atomic energy industry and light industry sectors, and have become important new materials in the national economy.This paper aims to look for low cost and economically versatile adsorbents from cheap available raw materials, namely selecting fly ash (FA) as the raw material for preparing zeolite mesoporous molecular sieve. The experiment prepared for zeolite molecular sieve by hydrothermal crystallization, and studied the change of the crystal transformation in the synthesis process and particle agglomeration. The so-called third foaming method is the three progressive method of crystal to form different three-dimensional pore structure, thereby to increasing the application of crystal adsorption. Experiments made innovations in zeolite preparation, which develop the traditional preparation methods through adding coupling agents and the zeolite-polymer to get the zeolite materials. Third foaming method was achieved by changing the conditions of activation, modification and crystallization to be used for synthesis of highly selective zeolite topology molecular sieve. The experimental products were characterized by means of X-ray fluorescence (XRF), scanning electron microscope (SEM), X-ray diffraction (XRD), and automated surface area&pore size analyzer. The results indicated that the zeolite topology molecular sieve adsorption ratio of benzene gas was up to63.72%.