Síntese e caracterização de sílica mesoporosa contendo ferro para processos de dessulfurização.

Abstract

The mesoporous molecular sieve MCM-41 type is considered promising with support for metals in various refining processes of petroleum-based materials, such as adsorbent and catalyst for environmentally friendly processes (desulfurization among others). This work was synthesized molecular sieve MCM-41 and impregnated this different proportions of metal (Fe3+ ), with the goal of using these catalysts in processes of desulfurization of heavy oils. The support (MCM-41) was synthesized through hydrothermal method at 100 ° C for 7 days and subjected to calcination for 2 hours. After calcination support was characterized by X-ray diffraction (XRD), thermogravimetry (TG) and derivative thermogravimetry (DTG), adsorption / desorption of nitrogen (BET method), and infrared spectroscopy (FTIR). Then the support was impregnated with the active phase (iron) and the resulting catalyst tested in a micro-rhetorician, connected to a gas chromatograph equipped with a PFPD detector, the selective sulfur. And from analysis of physico-chemical and catalytic test verified that support was successfully synthesized by hydrothermal method, and that this catalyst was efficient in desulfurization process using thiophene as a probe molecule.