Formal Kinetic Parameters – Problems and Solutions in Deriving Proper Values

Kinetic modelling of biomass fast devolatilization using Py-MS: Model-free and model-based approaches

“…However, developing a rigorous mechanistic model remains challenging [22]. Most models expanding the thermal decomposition of biomass can be considered pseudo-mechanistic, for which assumptions about the underlying chemistry are required, but their kinetic parameters fit experimental data [23]. Devolatilization reactions are commonly described as chemical components (cellulose, hemicelluloses, and lignins) or pseudo-components.…”

Reconsidering the potential of micropyrolyzer to investigate biomass fast pyrolysis without heat transfer limitations

“…In recent years, few studies have started to publish fast pyrolysis kinetics datasets using analytical pyrolysis instruments under isothermal conditions without verifying the isothermal nature of the experiment [29,[62][63][64]. In this paper, the non-isothermal character of biomass fast pyrolysis using the micropyrolyzer is confirmed, and a non-isothermal kinetic approach is required.…”

“…8. Conversion curve for cellulose thermal decomposition (on the left) obtained using the Frontier lab micropyrolyzer at 673 K coupled to a mass spectrometer (data were taken from [63]). Simulated temperature history of biomass sample arranged in the form of torus (on the right) obtained at the same conditions of the experiment (of 200 μg of cellulose and helium flow rate of 20 mL/min).…”