title: Modeling of the reburning process using sewage sludge-derived syngas.
abstract: Gasification of sewage sludge can provide clean and effective reburning fuel for combustion applications. The motivation of this work was to define the reburning potential of the sewage sludge gasification gas (syngas). A numerical simulation of the co-combustion process of syngas in a hard coal-fired boiler was done. All calculations were performed using the Chemkin programme and a plug-flow reactor model was used. The calculations were modelled using the GRI-Mech 2.11 mechanism. The highest conversions for nitric oxide (NO) were obtained at temperatures of approximately 1000-1200K. The combustion of hard coal with sewage sludge-derived syngas reduces NO emissions. The highest reduction efficiency (>90%) was achieved when the molar flow ratio of the syngas was 15%. Calculations show that the analysed syngas can provide better results than advanced reburning (connected with ammonia injection), which is more complicated process.
authors.affiliation: Institute of Thermal Technology, Silesian University of Technology at Gliwice, 44-100 Gliwice, Konarskiego 22, Poland. sebastian.werle@polsl.pl
authors.forename: Sebastian
authors.initials: S
authors.lastname: Werle
mesh_terms: D003031:Coal; D005740:Gases / Q000737:chemistry*; D006358:Hot Temperature; D008956:Models, Chemical; D009589:Nitrogen Oxides / Q000737:chemistry*; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid
chemical_list: D003031:Coal; D005740:Gases; D009589:Nitrogen Oxides; D012722:Sewage