title: Abatement of SO2-NOx binary gas mixtures using a ferruginous active absorbent: Part I. Synergistic effects and mechanism.
abstract: 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.
authors: School of Mathematics and Physics, North China Electric Power University, Baoding 071003, China; School of Energy Resources and Department of Chemical & Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
authors: Yinghui
authors: Y
authors: Han
authors: Shanxi Electric Power Exploration & Design Institute, China's State Energy Group Co., Taiyuan 030001, China.
authors: Xiaolei
authors: X
authors: Li
authors: School of Energy Resources and Department of Chemical & Petroleum Engineering, University of Wyoming, Laramie, WY 82071, USA; School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA. Electronic address: mfan@uwyo.edu.
authors: Maohong
authors: M
authors: Fan
authors: School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
authors: Armistead G
authors: AG
authors: Russell
authors: School of Mathematics and Physics, North China Electric Power University, Baoding 071003, China.
authors: Yi
authors: Y
authors: Zhao
authors: School of Mathematics and Physics, North China Electric Power University, Baoding 071003, China.
authors: Chunmei
authors: C
authors: Cao
authors: School of Mathematics and Physics, North China Electric Power University, Baoding 071003, China.
authors: Ning
authors: N
authors: Zhang
authors: School of Mathematics and Physics, North China Electric Power University, Baoding 071003, China.
authors: Genshan
authors: G
authors: Jiang
mesh_terms: D065966:Absorption, Physicochemical; D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D005740:Gases; D058085:Iron Compounds / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D009589:Nitrogen Oxides / Q000737:chemistry*; D013052:Spectrometry, X-Ray Emission; D013458:Sulfur Dioxide / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D000393:Air Pollutants; D005740:Gases; D058085:Iron Compounds; D009589:Nitrogen Oxides; D013458:Sulfur Dioxide
keywords: Binary gas; Denitration; Desulfurization; Fe(VI); Synergized effect; Thermodynamics