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Low Emission Combustion Technology for Landfills

| 2017:347 | Abdallah Abou-Taouk, Martin Nilsson, Pontus Wettrell, Jan Holmström, Håkan Sandberg, Lars Gustavsson
This report describes the optimization of a reduced global reaction mechanism for landfill gas aiming for the gas composition CH4 24.2%, 21.6% CO2, 2.0% O2 and 52.2% N2 based on volume.
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\u003Cp\u003EThe chemical reduced mechanism gave good agreement with the theoretical kinetic calculations. The report also includes\u003Cbr /\u003ECFD combustion results using the Cleanergy existing combustion chambers\u003Cbr /\u003Ewith different gases and the new reaction mechanism for understanding the\u003Cbr /\u003Eflow and combustion. Finally, the CFD result of a new developed combustion\u003Cbr /\u003Echamber based on a swirling air and gas flow are presented. One of the main\u003Cbr /\u003Efactors affecting the combustion result is the mixing of fuel and oxygen. The\u003Cbr /\u003Enumerical results provide a deep understanding of the technology that enables\u003Cbr /\u003Ea thermal power up to 60 kW based on a 18% methane content. Simulations\u003Cbr /\u003Eof the prototype also shows that is possible to provide electricity down to 15%\u003Cbr /\u003Emethane content based on a lower power.\u003C/p\u003E