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Title: Pyrolysis of pellets made with biomass and glycerol: Kinetic analysis and evolved gas analysis
Authors: Bartocci, P.
Anca-Couce, A.
Slopiecka, K.
Nefkens, S.
Evic, N.
Retschitzegger, S.
Barbanera, M. 
Buratti, C.
Cotana, F.
Bidini, G.
Fantozzi, F.
Issue Date: 2017
Glycerol is a co-product compound of biodiesel production with an interesting heating value. In this work pyrolysis kinetic parameters for a pellet made with a mass fraction of 90% sawdust and a mass fraction of 10% glycerol are derived through thermogravimetric analysis. A new parallel reaction scheme with four components (cellulose, hemicellulose, lignin and glycerol) is adopted and the kinetic triplet for each component is derived using a model fitting approach applied to this particular kind of pellet. The isoconversional method Kissinger-Akahira-Sunose is employed both to provide initial values for model fitting simulations and to check final results. Results show that activation energies and pre-exponential factors are respectively: 149.7 kJ mol−1and 1.98*1011s−1for hemicellulose, 230.1 kJ mol−1and 1.84*1017s−1for cellulose, 154.3 kJ mol−1and 5.14*109s−1for lignin, 74.5 kJ mol−1and 2.17*105s−1for glycerol with a first reaction order for all components, except for lignin (n = 2.6). Through evolved gas analysis it was demonstrated that the thermal degradation of glycerol contained in the pellet can increase hydrogen content in pyrolysis gases.
ISSN: 0961-9534
DOI: 10.1016/j.biombioe.2016.12.004
Appears in Collections:A1. Articolo in rivista

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