Estudo da obtenção de catalisadores à base de lama vermelha para utilização no craqueamento térmico catalítico de biomassas

Abstract

Over the years, the industrial development has brought a growing generation of waste, that are potential environmental problems. Red mud is a waste generated in large quantities in the production of alumina in the Bayer process. In view of the potential environmental impacts related to improper discharge of this waste, we have studied the development of applications of red mud in the various branches of industry. In this present work was to study to obtain catalysts red mud base, a residue of the processing of bauxite for use in the catalytic thermal cracking of biomass. In the development of this study, the initial sample of red mud waste material was subjected to a drying process in oven at 110 ° C for 120 minutes. After this step, the samples were subjected to a heat treatment for calcination and sintering at 400, 800 and 1200 ° C. After heat treated samples were chemically treated by leaching process where samples of 100 grams were leached with 434.7 ml of sulfuric acid. It was observed that the red mud of behavior does not change until the temperature of 800°C, with no variation in morphology and composition that may be considered relevant. But the 1200°C, there was a variation in the concentrations of the compounds present, checking a more significant change for the titanium element and sodium.