Kinetic parameters of fast and slow pyrolysis is comparedin this study

What is it about?

For fast pyrolysis, cylindrical wood pieces of 20 mm diameter and 50 mm length is pyrolysed in a tube furnace at temperatures ranging from 300°C to 500°C. Solid, liquid and gas products are collected and the yields are calculated. For slow pyrolysis, thermogravimetric analysis (TGA) is used using sawdust from the same biomass. Using the experimental data from two different methods the kinetic parameters are calculated such as activation energy and pre-exponential factor for the two different pyrolysis methods.

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Why is it important?

For fast pyrolysis the parameters are found to be E = 32.5 kJ/mol and A = 35/min and for slow pyrolysis Es = 50.48 kJ/mol and As = 3179.86/min. The large difference between the values show that kinetic studies and modelling work using thermogravimetric analysis data is not suitable for commercial scale simulation.

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