Kinetics of Pyrolysis and Gasification Using Thermogravimetric and Thermovolumetric Analyses
Autor: | Grzegorz Czerski, Przemysław Grzywacz, Katarzyna Zubek |
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Rok vydání: | 2016 |
Předmět: |
TGA
Thermogravimetric analysis Municipal solid waste Waste management Chemistry business.industry 020209 energy lcsh:QE1-996.5 thermovolumetrics gasification Biomass 02 engineering and technology Raw material Solid fuel Isothermal process lcsh:Geology 020401 chemical engineering Chemical engineering kinetics 0202 electrical engineering electronic engineering information engineering Coal 0204 chemical engineering business Pyrolysis |
Zdroj: | GeoScience Engineering, Vol 62, Iss 1, Pp 17-25 (2016) |
ISSN: | 1802-5420 |
Popis: | The carbon dioxide gasification process of Miscanthus giganteus biomass was examined using two methods. First an isothermal thermovolumetric method was applied. The measurement was conducted at 950°C and pressure of 0.1 MPa. Based on the continuous analysis of different kinds of gases formed during the gasification process, the thermovolumetric method allowed the determination of yields and composition of the resulting gas as well as the rate constant of CO formation. Then a non-isothermal thermogravimetric method was applied, during which the loss of weight of a sample as a function of temperature was recorded. In the course of the measurement, the temperature was raised from ambient to 950°C and the pressure was 0.1 MPa. As a result, a change in the carbon conversion degree was obtained. Moreover, TGA methods allow distinguishing various stages of the gasification process such as primary pyrolysis, secondary pyrolysis and gasification, and determining kinetic parameters for each stage. The presented methods differs from each other as they are based either on the analysis of changes in the resulting product or on the analysis of changes in the supplied feedstock, but both can be successfully used to the effective examination of kinetics of the gasification process. In addition, an important advantage of both methods is the possibility to carry out the gasification process for different solid fuels as coal, biomass, or solid waste in the atmosphere of a variety of gasification agents. |
Databáze: | OpenAIRE |
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