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Updated: Mar 15, 2026
07:30
Fast Pyrolysis of Biomass Residues in a Twin-screw Mixing Reactor
Published on: September 9, 2016
28.4K
Kinetic analysis of manure pyrolysis and combustion processes
M Fernandez-Lopez1, G J Pedrosa-Castro1, J L Valverde1
1Department of Chemical Engineering, University of Castilla-La Mancha, Ciudad Real, Spain.
Waste Management (New York, N.Y.)
|September 6, 2016
Summary
Biomass waste, like dairy and swine manure, can be converted to renewable energy. Anaerobic digestion does not significantly alter the pyrolysis and combustion kinetics of dairy manure.
Area of Science:
- Chemical Engineering
- Renewable Energy
- Biomass Conversion
Background:
- Fossil fuel depletion and environmental concerns necessitate renewable energy alternatives.
- Biomass waste presents a promising source for sustainable energy production.
- Understanding the thermochemical conversion kinetics of biomass is crucial for efficient energy recovery.
Purpose of the Study:
- To investigate the pyrolysis and combustion kinetics of dairy and swine manure waste.
- To compare the effectiveness of different kinetic models (iso-conversional and multi-component) for biomass thermochemical processes.
- To assess the impact of anaerobic digestion on the thermochemical conversion kinetics of dairy manure.
Main Methods:
- Thermogravimetric analysis (TGA) was employed to study the pyrolysis and combustion behavior.
- Four kinetic methods were compared: Friedman, Flynn-Wall-Ozawa (FWO), Kissinger-Akahira-Sunose (KAS), and Coats-Redfern.
- The Distributed Activation Energy Model (DAEM) and Pseudo-Multi Component Stage Model (PMSM) were applied to predict weight loss curves.
Main Results:
- Activation energy (Ea) values for devolatilization ranged from 148-209 kJ/mol across different manure types.
- Char oxidation stages generally exhibited lower Ea values compared to the combustion devolatilization stage.
- The kinetics of pyrolysis and combustion were not significantly affected by anaerobic digestion of dairy manure.
- The Distributed Activation Energy Model (DAEM) provided the best fit for the experimental pyrolysis and combustion data.
Conclusions:
- Biomass waste, including dairy and swine manure, can be effectively characterized for thermochemical energy conversion.
- Anaerobic digestion does not substantially alter the kinetic parameters governing the pyrolysis and combustion of dairy manure.
- The DAEM is a suitable model for predicting the thermochemical conversion behavior of biomass waste.
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