Development of silica-based monoliths for the capture of carbon dioxide

Reference	Presenter	Authors (Institution)	Abstract
17-045	Andressa Aparecida Alves	Alves, A.A.(Universidade Federal de Minas Gerais); Vasconcelos, W.L.(Universidade Federal de Minas Gerais);	The synthesis of mesoporous materials on a macroscopic scale, such as monoliths, has been of great interest given the wide range of applications that this material holds. Thus, this work reports the production of silica monoliths for being used in the carbon dioxide (CO2) adsorption process. Different samples were synthesized by the sol-gel method, using tetraethilorthosilicate (TEOS) precursor as a silica source and cetyltrimethylammonium bromide (CTAB) as a surfactant. The samples were characterized by X-ray diffraction (XRD) and N2 adsorption-desorption (BET). The X-ray diffractograms revealed that the samples were amorphous with a high BET surface area of 1048 m2/g. Later, a study of the influence of the synthesis conditions and adsorption performances were carried out. These tests presented very satisfactory results, being 45 mg/g the highest value found for the CO2 sorption capacity.
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