title: Study of enhanced low-quality coal oxidative desulphurization and deashing by using HNO3 and microwave pretreatment.
abstract: In this paper, the effect of urea-hydrogen peroxide (UHP) solution on desulphurization and demineralization of coal with high sulphur and high ash by using HNO3 and microwave pretreatment was investigated. The oxidation process is strongly dependent on irradiation power and time for microwave pretreatment, UHP concentration, leaching time and temperature of the UHP solution. X-ray diffraction and Fourier transform infrared technique have been performed for the raw and treated coals. Compared with the UHP alone, successive treatments with HNO3 and microwave pretreatment resulted in the significant removal of total sulphur and mineral matter from the coal. The proposed experimental method has the meaning of practical guide to the desulphurization and deashing of coal by microwave.
authors.affiliation: Institute of Chemical Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, People's Republic of China. wb6314005@126.com
authors.forename: Xiangmei
authors.initials: X
authors.lastname: Ma
authors.affiliation: lnstitute of Earth & Environment, Anhui University of Science and Technology, Huainan, Anhui 232001, People's Republic of China.
authors.forename: Mingxu
authors.initials: M
authors.lastname: Zhang
authors.affiliation: lnstitute of Earth & Environment, Anhui University of Science and Technology, Huainan, Anhui 232001, People's Republic of China.
authors.forename: Fanfei
authors.initials: F
authors.lastname: Min
mesh_terms: D003031:Coal / Q000032:analysis* / Q000528:radiation effects*; D060729:Coal Ash / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D006861:Hydrogen Peroxide / Q000737:chemistry* / Q000528:radiation effects; D008872:Microwaves; D017942:Nitric Acid / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction / Q000528:radiation effects; D011829:Radiation Dosage; D013457:Sulfur Compounds / Q000737:chemistry / Q000302:isolation & purification* / Q000528:radiation effects; D014508:Urea / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D003031:Coal; D060729:Coal Ash; D013457:Sulfur Compounds; D017942:Nitric Acid; D014508:Urea; D006861:Hydrogen Peroxide