Pyrolysis Kinetics of Asphaltites Determined by Thermal Analysis

Abstract

Thermal behavior of Harbul asphaltites (SE Anatolia, Turkey) has been studied using thermogravimetric analysis at atmospheric pressure and with nitrogen as the ambient gas. Asphaltite samples were ground and separated according to their size by sieving. Particle size distribution and chemical composition of asphaltite fractions are given. TG/DTG data of samples demonstrated two stages of mass loss. The first stage, called primary volatization, occurs in the range of 200-600 °C, and the second stage, called secondary gasification, in the range of 600-800 °C. Kinetic parameters of pyrolysis of asphaltite samples (activation energy, Arrhenius constant and reaction rate constant) were determined separately for both two stages using Coats-Redfern kinetic model.

Desulfurization and Demineralization of Asphaltite by Aqueous Caustic Leaching

“…Eventhough asphaltites have the physical appearance of coal, they are derived from crude oil which migrated to inorganic formations. By the effect of catalytic activity of inorganic matrix, metamorphosis has taken place to produce condensed heavier hydrocarbon structures due to various chemical, physical, and biological changes [1][2][3][4][5][6][7][8].…”