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Pyrolysis of biomass is the result of complex interactions among numerous chemical and physical processes, which take place across the particle and the reaction environment. The relative importance of the different processes is highly dependent on particle characteristics (thermochemical properties, size, moisture and ash content) and the type of conversion unit (heat and mass transfer between particle and reactor, extra-particle activity of secondary reactions). In this paper, the different approaches chosen to model intra- and extra-particle processes of biomass pyrolysis are briefly illustrated in relation to fixed-bed, fluid-bed and ablative reactors. The experimental measurements needed to produce data for process simulation and model validation are listed. Examples of numerical simulation are presented for the convective/radiative pyrolysis of a moist cellulosic particle. Finally, suggestions are given on how modelling can be used for process development and optimisation.

Additional information

Authors: DI BLASI C, Dipartimento di Ingegneria Chimica, Università degli Studi di Napoli (IT)
Bibliographic Reference: A chapter in "Fast Pyrolysis of Biomass: a handbook, Volume 2", CPL Press, 2002, pp.371-379. 95 pounds sterling
Availability: Available from: CPL Press, Liberty House, The Enterprise Centre, New Greenham Park, Newbury, RG19 6HW, UK Tel: +44-1635-817408; Fax: +44-1635-817409 Email: Website:
ISBN: ISBN: 1-872691-47-1
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