ISSN print edition: 0366-6352
ISSN electronic edition: 1336-9075
Registr. No.: MK SR 9/7
A reburning process using sewage sludge-derived syngas
Institute of Thermal Technology, The Silesian University of Technology at Gliwice, 22 Konarskiego, 44100 Gliwice, Poland
Abstract: The motivation for this work was to define the reburning potential of sewage sludge (SS) gasification gas (syngas). A numerical
simulation of the co-combustion process of syngas in a hard coal-fired boiler was made. All calculations were performed using
the Chemkin program and a plug-flow reactor model was used. The calculations were modelled using the GRI-Mech 3.0 mechanism.
The highest conversions for nitric oxide (NO) were obtained at temperatures of approximately 1000 K to 1200 K. The highest
reduction efficiency was achieved when the molar flow-ratio of the syngas was 15 %. The combustion of hard coal with sewage
sludge-derived syngas reduces NO emissions and the amount of coal needed to produce electricity and heat. Furthermore, advanced
reburning, a more complex process, achieved an efficiency of up to 80 %. Calculations show that the syngas thus analysed can
provide better results.
Keywords: reburning – plug-flow reactor – syngas
Full paper is available at www.springerlink.com.
Chemical Papers 66 (2) 99–107 (2012)