A Study of Co-combustion Characteristics of Biomass Fuels and a Lignite Coal with Thermo Gravimetric Analysis
10th International Conference on Combustion and Energy Utilization, Muğla, Turkey, 4 - 08 May 2010, pp.306-313, (Full Text)
- Publication Type: Conference Paper / Full Text
- City: Muğla
- Country: Turkey
- Page Numbers: pp.306-313
- Akdeniz University Affiliated: No
Abstract
In this study, combustion characteristics of three biomass fuels and three Turkish lignite coals were investigated by using a thermo gravimetric analyzer. Lignite coals are low rank coals, high in sulfur, ash and moisture. The effect of co-combustion of wood chips with Turkish lignite coals was also investigated to see the interaction and possible synergistic effects between biomass and coal during combustion. There are just a few studies investigating the co-combustion characteristics of coal and biomass, and the effect of their various combinations on the peak temperatures and burnout times.
Results of this study have shown that low rank coals can be burned with biomass very beneficially. As the VM content of the coal increases, the ignition temperature decreases and the maximum combustion rate is reached at lower temperatures. Biomass fuels are found to be more reactive than lignite coals studied here. About 80-90% of the fuel is combusted as the combustion of volatile matter. Then the combustion of the char formed takes time. The amount of the char formed depends on the amount of the FC% in the fuel.
Co-combustion of lignite coals with wood chips has been mainly experimented in this study. As the biomass content of the fuel mixture increases the VM content of the mixture increases, too. The ignition temperatures of the mixtures are found to be very close to that of the biomass. Therefore, it can be said that biomass in the mixture starts to burn first and then coal follows.