The complex composition and molecular structure of biomass lead to more
complex and diversified chemical reactions in the pyrolysis. According
to the structural characteristics of the reactants, this paper
simplifies the pyrolysis process and extends the research focus from the
micro-molecular elementary reactions to the macro reaction kinetics. The
wheat straw is chosen as the investigated biomass, and the promoted
chemical percolation devolatilization (CPD) with modified pseudo-grid
and chain reaction kinetics (CRK) pyrolysis models were constructed for
predicting the pyrolysis characteristics. Compared with the experimental
results, the prediction errors of char, oil and gas production are in a
reasonable range of < 10 %. Moreover, the reliability of the
model is verified by comparing with the experimental thermogravimetric
curve, which shows that the model could well predict the mass loss,
product distribution and component characteristics, and provides a
reasonable prediction for the pyrolysis of biomass.
Simulation analysis of biomass pyrolysis based on the improved CPD model with chain reaction dynamics