title: An investigation on pollutant emissions from co-firing of RDF and coal.
abstract: Pollutant emissions from co-firing of refuse derived fuel (RDF) and coal were investigated in a vortexing fluidized bed combustor (VFBC). RDF-5 was made of common municipal solid waste (MSW). CaCO(3) was injected in the combustor to absorb HCl at 850 degrees C. The results show that NO(x) and HCl emissions increase with RDF-5 co-firing ratio. The NO(x) concentration in flue gas at the bottom of the combustor is higher than that at the top. However, the trend of HCl released is reverse compared with NO(x) emissions. It was found that the HCl concentration decreases with increasing the molar ratio of Ca/Cl. However, the effect of CaCO(3) addition on HCl retention is not significant when the molar ratio of Ca/Cl is higher than 5. The chlorine content in fly ash increases obviously with the molar ratio of Ca/Cl. PCDD/Fs emissions decrease slightly with an addition of CaCO(3). In this study incomplete combustion is regarded as the main cause for polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) formation.
authors.affiliation: Department of Chemical Engineering, Chung Yuan Christian University, Chungli, Taiwan, ROC. cschyang@gmail.com
authors.forename: Chien-Song
authors.initials: CS
authors.lastname: Chyang
authors.forename: Yun-Long
authors.initials: YL
authors.lastname: Han
authors.forename: Li-Wei
authors.initials: LW
authors.lastname: Wu
authors.forename: Hou-Peng
authors.initials: HP
authors.lastname: Wan
authors.forename: Hom-Ti
authors.initials: HT
authors.lastname: Lee
authors.forename: Ying-Hsi
authors.initials: YH
authors.lastname: Chang
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001572:Benzofurans / Q000032:analysis; D002118:Calcium / Q000737:chemistry; D002122:Calcium Chloride / Q000737:chemistry; D002248:Carbon Monoxide / Q000032:analysis; D002713:Chlorine / Q000737:chemistry; D002947:Cities; D003031:Coal; D000072338:Dibenzofurans, Polychlorinated; D004736:Energy-Generating Resources; D009584:Nitrogen / Q000032:analysis / Q000737:chemistry; D010100:Oxygen / Q000032:analysis / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis; D011210:Power Plants; D014866:Waste Products / Q000032:analysis*
chemical_list: D000393:Air Pollutants; D001572:Benzofurans; D003031:Coal; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D014866:Waste Products; C041364:nitrox; D002713:Chlorine; D002248:Carbon Monoxide; D002122:Calcium Chloride; D009584:Nitrogen; D010100:Oxygen; D002118:Calcium