TY - JOUR ID - 10.1016/j.jes.2014.10.012 TI - Abatement of SO2-NOx binary gas mixtures using a ferruginous active absorbent: Part I. Synergistic effects and mechanism AU - Yinghui Han AU - Xiaolei Li AU - Maohong Fan AU - Armistead G. Russell AU - Yi Zhao AU - Chunmei Cao AU - Ning Zhang and Genshan Jiang VL - 27 IS - 4 PB - SP - 55 EP - 64 PY - JF - Journal of Environmental Sciences JA - J. Environ. Sci. UR - http://www.jesc.ac.cn/jesc_en/ch/reader/view_abstract.aspx?file_no=2015300406&flag=1 KW - Fe(VI);Desulfurization;Denitration;Binary gas;Synergized effect;Thermodynamics KW - Fe(VI);Desulfurization;Denitration;Binary gas;Synergized effect;Thermodynamics AB - A novel ferruginous active absorbent, prepared by fly ash,industrial lime and the additive Fe (VI), was introduced for synchronous abatement of binary mixtures of SO2-NOx from simulated coal-fired flue gas. The synergistic action of various factors on the absorption of SO2 and NOx was investigated. The results show that a strong synergistic effect exists between Fe(VI) dose and reaction temperature for the desulfurization. It was observed that in the denitration process, the synergy of Fe(VI) dose and Ca/(S+N) had the most significant impact on the removal of NO, followed by the synergy of Fe(VI) and reaction temperature, and then the synergy of reaction temperature and flue gas humidity. A scanning electron microscope(SEM) and an accessory X-ray energy spectrometer (EDS) were used to observe the surface characteristics of the raw and spent absorbent as well as fly ash. A reaction mechanism was proposed based on chemical analysis of sulfur and nitrogen species concentrations in the spent absorbent. The Gibbs free energy, equilibrium constants and partial pressures of the SO2-NOx binary system were determined by thermodynamics. ER -