Heterogeneous Reactions of Char and Carbon

  • F. Douglas Skinner
  • L. Douglas Smoot


The combustion or gasification of coal may be thought of as occurring in several steps. First, the coal is heated at high rates, and rapid devolatilization occurs. The volatiles then react in the gas phase. (These processes are discussed in detail in Chapters 8 and 10.) The char remaining after devolatilization consists primarily of carbon, together with the major part of the ash components and some volatile matter. The heterogeneous reactions of the char with oxidizing gases (oxygen, steam, carbon dioxide, etc.) account for the majority of time required for particle burnout. In addition, in the case of gasification, the reaction of char with hydrogen may also become important, especially for high hydrogen partial pressures.


Reaction Order Heterogeneous Reaction Bituminous Coal Petroleum Coke Pore Diffusion 
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Copyright information

© Springer Science+Business Media New York 1979

Authors and Affiliations

  • F. Douglas Skinner
    • 1
  • L. Douglas Smoot
    • 2
  1. 1.Chemical EngineeringBrigham Young UniversityProvoUSA
  2. 2.Brigham Young UniversityProvoUSA

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