Analysis of Kinetics Parameters of Oil Shale Pyrolysis

  • Juliana P. Foltin
  • Guilherme N. Prado
  • Antonio C. L. Lisbôa

Abstract

The composition of the shale is a mixture of kerogen contained in the shale of organic matter and various mineral compounds. The limits between the kerogen and the mineral compounds can only be broken by the pyrolysis process, being very complex due to the structure of the kerogen generating many reactions. These reactions involve the breaking of chemical bonds with different energies in the organic phase and between the organic phase and the mineral matter. New alternatives are being studied for oil recovery between the use of shale. As a new requirement of an alternative for improvements in shale processing, is to optimize the pyrolysis process, through literature models are calculated kinetic parameters. Thus, kinetic parameters were determined from dynamic thermogravimetric analysis (TGA) in the temperature range of 323 K to 1,173 K, using different methods proposed by the literature. One of the most common places for extracting bituminous shale is the Irati basin in southern Brazil. The extraction was carried out by Petrobras / SIX in the city of São Mateus do Sul, Parana, Brazil. The kinetic parameters, as well as the activation energy and the pre-exponential factor were calculated using Friedman, Kissinger, Kissinger-Akahira-Sunose (KAS) methods and the Flynn-Wall-Ozawa (FWO) method. In addition, it was studied the characterization of shale behavior for a better evaluation.
Published
2017-09-01
How to Cite
Foltin J., Prado G., Lisbôa A., 2017, Analysis of Kinetics Parameters of Oil Shale Pyrolysis , Chemical Engineering Transactions, 61, 439-444.