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Research on the catalytic pyrolysis characteristics and kinetics of pine sawdust
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DOI：10.1007/s10973-026-16074-2.png)
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Abstract
En 中文
Biomass fast catalytic pyrolysis efficiently converts organic materials into high-value products. However, the lack of comprehensive kinetic data constrains the rational design and scale-up of pyrolysis reactors, thereby impeding the optimization of product distribution and the overall process efficiency. To establish comprehensive kinetic insights, the pyrolysis of pine sawdust (PS) was catalyzed using two low-cost industrial wastes with distinct acid–base properties: spent fluid catalytic cracking (FCC) catalyst and red mud (RM). The Friedman, FWO, and distributed activation energy model (DAEM) methods were applied to analyze the catalytic pyrolysis process, all of which demonstrated high fitting accuracy. The effective activation energies derived from the Friedman and FWO isoconversional methods ranged between 140 and 220 kJ mol−1, while the distributed activation energy model (DAEM) yielded component-specific values up to approximately 238 kJ mol−1. Industrial waste catalysts effectively lowered the Ea, with the FCC catalyst exhibiting the strongest effect: the average Ea derived from the FWO and Friedman methods were 173.20 kJ mol−1 and 170.91 kJ mol−1, respectively. DAEM further revealed that the acidic-type catalyst (FCC) tended to reduce the Ea of CNT1 (hemicellulose) and CNT3 (lignin), while alkaline catalysts mainly lowered those of CNT1 and CNT2 (cellulose). A comparative evaluation of the isoconversional and model-fitting methods indicated that DAEM provided complementary insights into high-temperature component decomposition, whereas the isoconversional methods more clearly elucidated the overall influence of catalysts on the pyrolysis process.
Keywords:
Biomass
Pyrolysis kinetics
DAEM method
Spent FCC catalyst
Red mud
Journal
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3.1
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1.8W
Citations:
3.2W
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Cited Papers