Production of Pure Granules Of Sba-15 Mesoporous Silica

Abstract

Mesoporous silica materials have been widely investigated for their great potential as competitive adsorbents and catalysts in different areas, due to their ordered and uniform porous structures and high surface area. In order to increase the availability of these materials, the need to granulate them becomes vital for an efficient performance in industrial units. This study reports the production and characterization of clay-free granules of SBA-15 mesoporous silica, by applying the extrusion technique. The suggested methodology uses only methocel as the organic binder, which is removed after calcination. The granulation process was successfully achieved, producing pure granules of SBA-15 mesoporous silica, in size of millimeters, with 8.3 MPa of compacting pressure (by axial crushing test). The surface area and pore volume of SBA-15 mesoporous silica granules (calcined at 800 ºC) were around 392 m 2 /g and 0.53 cm 3 /g, respectively.

Imidazolium-based Ionic Liquids Impregnated in Silica and Alumina Supports for CO2 Capture

“…In order to overcome limitations related to ILs high viscosity, as poor CO 2 dynamics separation, ILs impregnation in solid materials appears as a good platform 28 . Solid materials such as silica and alumina hold large specific surface area, pore volume, tunable pore size and good stability being interesting candidates for applications in separation processes 2,26,[29][30][31][32][33] . Besides these characteristics, some factors are fundamental to ensure these materials applicability, such as: fast kinetic, CO 2 sorption capacity, CO 2 selectivity, chemical and thermal stability 1,34,35 .…”

Room temperature and ambient pressure deposition of Cu-BTC MOF on SBA-15 functionalized silica supports by simple spray layer-by-layer method

“…For the SBA-15 (Fig. 5c), the main bands are from 1300 to 1000 cm − 1 , due to Si -O -Si asymmetric stretching vibrations [13]. The characteristic vibrational band related to the -OH groups was seen around 982 cm − 1 [11].…”

“…Copper acetate anhydride (Cu(OAc) 2 ), 1,3,5-benzene tricarboxylic acid (H 3 BTC), ethanol (99.5 %) and The methylcellulose (Methocel A4M) were obtained from Sigma-Aldrich and used as received unless otherwise stated. The SBA-15 mesoporous silica powder was previously obtained employing the established synthesis [13,28] and calcined at 500 • C.…”

“…1. The presence of these groups allows the incorporation of new materials in the silica structure [6,13]. SBA-15 was chosen as a support for Cu-BTC for many reasons:…”