Synthesis of Ag /SBA-15 as adsorbent for propane/propylene separation

E.I. BASALDELLA, P.G. VÁZQUEZ AND N. FIRPO

Praga

Conferencia; FEZA 2005; 2005

Mesoporous silica Sba-15 was used as support for the synthesis of p-complexation adsorbents. Samples of mesoporous silica containing variable quantities of AgNO3 were prepared in order to study changes in the Ag+ dispersion produced by different thermal treatments. The samples were activated by heating at different temperatures in air. The solids obtained were characterized by DRX, nitrogen adsorption, EDX, SEM, TEM, and the corresponding propylene equilibrium adsorption curves were obtained. It was found that thermal treatment conducted at about 100°C in air produces high salt dispersion and prevents the transformation in Ag2O or Ag°. Activated samples having intermediate values of Ag concentration showed the highest propylene adsorption capacity.