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Trends in Chemical Engineering   Volumes    Volume 6 
Abstract
Thermal conversion processes of low-rank coals from Argentinean minefields
A. L. Cukierman, J. Ochoa, M. C. Cassanello, P. R. Bonelli
Pages: 43 - 66
Number of pages: 24
Trends in Chemical Engineering
Volume 6 

Copyright © 2000 Research Trends. All rights reserved

ABSTRACT

Development of efficient clean technologies based on coal conversion processes, pyrolysis, gasification, for energy generation and chemicals production requires a deep knowledge of coal features and their variations with the process course. Also, kinetic information of these processes is vital for proper design and modeling of commercial reactors.

In spite of the vast literature on the subject, the behavior of a particular coal subjected to thermal conversion is still difficult to predict appropriately from reported data. Particularly, information of South American coals is rather scarce in the open literature and it is even more restricted for the low rank coals from the several coalfields mostly located in the South-western region of Argentine.

In an updated context of the main experimental and theoretical advances related to the subject, this work presents own experimental data and discuss the behavior of two different types of low rank coals, subbituminous and high volatile bituminous, from the most extensive Argentinean minefields, examining especially:

  • coals features; i.e., composition, structure, and surface properties (specific surface areas, pore size distributions, surface fractal dimensions) and their        modifications induced by pyrolysis at different operating conditions and mineral matter removal.
  • the behavior of coal samples submitted to pyrolysis and the kinetics of this process.
  • the kinetics of char samples gasification, using oxygen and carbon dioxide as gasifying agents, under kinetic and diffusional control conditions.
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