title: Influence of Fe loadings on desulfurization performance of activated carbon treated by nitric acid.
abstract: A series of Fe supported on activated carbon treated by nitric acid are prepared by incipient wetness impregnation with ultrasonic assistance and characterized by N2adsorption-desorption, X-ray diffraction, Fourier transform infrared spectrum and X-ray photoelectron spectroscopy. It has shown that Fe loadings significantly influence the desulfurization activity. Fe/NAC5 exhibits an excellent removal ability of SO2, corresponding to breakthrough sulfur capacity of 323 mg/g. With the increasing Fe loadings, the generated Fe3O4and Fe2SiO4increase, but Fe2(SO4)3is observed after desulfurization. Fe/NAC1 has a Brunauer-Emmett-Teller (BET) surface area of 925 m2/g with micropore surface area of 843 m2/g and total pore volume of 0.562 cm3/g including a micropore volume of 0.300 cm3/g. With the increasing Fe loadings, BET surface area and micropore volume decrease, and those of Fe/NAC10 decrease to 706 m2/g and 0.249 cm3/g. The Fe loadings influence the pore-size distribution, and SO2adsorption mainly reacts in micropores at about 0.70 nm. C=O and C-O are observed for all samples before SO2removal. After desulfurization, the C-O stretching is still detected, but the C=O stretching vibration of carbonyl groups disappears. The stretching of S-O or S=O in sulfate is observed at 592 cm-1for the used sample, proving that the existence of [Formula: see text].
authors.affiliation: a College of Architecture and Environment , Sichuan University , Chengdu , People's Republic of China.|b National Engineering Research Center for Flue Gas Desulfurization , Chengdu , People's Republic of China.
authors.forename: Jia-Xiu
authors.initials: JX
authors.lastname: Guo
authors.affiliation: a College of Architecture and Environment , Sichuan University , Chengdu , People's Republic of China.
authors.forename: Song
authors.initials: S
authors.lastname: Shu
authors.affiliation: a College of Architecture and Environment , Sichuan University , Chengdu , People's Republic of China.|b National Engineering Research Center for Flue Gas Desulfurization , Chengdu , People's Republic of China.
authors.forename: Xiao-Li
authors.initials: XL
authors.lastname: Liu
authors.affiliation: a College of Architecture and Environment , Sichuan University , Chengdu , People's Republic of China.
authors.forename: Xue-Jiao
authors.initials: XJ
authors.lastname: Wang
authors.affiliation: a College of Architecture and Environment , Sichuan University , Chengdu , People's Republic of China.|b National Engineering Research Center for Flue Gas Desulfurization , Chengdu , People's Republic of China.
authors.forename: Hua-Qiang
authors.initials: HQ
authors.lastname: Yin
authors.affiliation: a College of Architecture and Environment , Sichuan University , Chengdu , People's Republic of China.|b National Engineering Research Center for Flue Gas Desulfurization , Chengdu , People's Republic of China.
authors.forename: Ying-Hao
authors.initials: YH
authors.lastname: Chu
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry*; D002384:Catalysis; D007501:Iron / Q000737:chemistry*; D017942:Nitric Acid / Q000737:chemistry*; D013458:Sulfur Dioxide / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D013458:Sulfur Dioxide; D017942:Nitric Acid; D002244:Carbon; D007501:Iron
keywords: Activated carbon; desulfurization; functional groups; iron; loading