title: Nitrogen evolution during the co-combustion of hydrothermally treated municipal solid waste and coal in a bubbling fluidized bed.
abstract: Nitrogen evolution was studied during the co-combustion of hydrothermally treated municipal solid wastes (HT MSW) and coal in a bubbling fluidized bed (BFB). HT MSW blending ratios as 10%, 20% and 30% (wt.%) were selected and tested at 700, 800, 900 °C. Emissions of NO and N2O from blends were measured and compared with the results of mono-combustion trials. Moreover, concentrations of precursors like NH3 and HCN were also quantified. The results are summarized as follows: NO emissions were predominant in all the cases, which rose with increasing temperature. The blending of HT MSW contributed to the NO reduction. N2O emissions decreased with temperature rising and the blending of HT MSW also presented positive effects. At 30% HT MSW addition, both NO and N2O emissions showed the lowest values (391.85 ppm and 55.33 ppm, respectively at 900 °C). For the precursors, more HCN was detected than NH3 and both played important roles on the gas side nitrogen evolution.
authors.affiliation: Department of Environmental Science and Technology, Tokyo Institute of Technology, G5-8, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan. Electronic address: koryokolion@gmail.com.
authors.forename: Liang
authors.initials: L
authors.lastname: Lu
authors.forename: Yuqi
authors.initials: Y
authors.lastname: Jin
authors.forename: Hongmei
authors.initials: H
authors.lastname: Liu
authors.forename: Xiaojun
authors.initials: X
authors.lastname: Ma
authors.forename: Kunio
authors.initials: K
authors.lastname: Yoshikawa
mesh_terms: D000393:Air Pollutants / Q000032:analysis; D000641:Ammonia / Q000737:chemistry; D003031:Coal; D004867:Equipment Design; D006856:Hydrogen Cyanide / Q000737:chemistry; D017745:Incineration / Q000295:instrumentation / Q000379:methods*; D009584:Nitrogen / Q000032:analysis*; D009589:Nitrogen Oxides / Q000032:analysis; D062611:Solid Waste
chemical_list: D000393:Air Pollutants; D003031:Coal; D009589:Nitrogen Oxides; D062611:Solid Waste; D006856:Hydrogen Cyanide; D000641:Ammonia; D009584:Nitrogen
keywords: Blending ratio; Bubbling fluidized bed; Co-combustion; Coal; Hydrothermally treated municipal solid waste; Nitrogen evolution