title: Mechanism study on the sulfidation of ZnO with sulfur and iron oxide at high temperature.
abstract: The mechanism of ZnO sulfidation with sulfur and iron oxide at high temperatures was studied. The thermodynamic analysis, sulfidation behavior of zinc, phase transformations, morphology changes, and surface properties were investigated by HSC 5.0 combined with FactSage 7.0, ICP, XRD, optical microscopy coupled with SEM-EDS, and XPS. The results indicate that increasing temperature and adding iron oxide can not only improve the sulfidation of ZnO but also promote the formation and growth of ZnS crystals. Fe2O3captured the sulfur in the initial sulfidation process as iron sulfides, which then acted as the sulfurizing agent in the late period, thus reducing sulfur escape at high temperatures. The addition of carbon can not only enhance the sulfidation but increase sulfur utilization rate and eliminate the generation of SO2. The surfaces of marmatite and synthetic zinc sulfides contain high oxygen due to oxidation and oxygen adsorption. Hydroxyl easily absorbs on the surface of iron-bearing zinc sulfide (Zn1-xFexS). The oxidation of synthetic Zn1-xFexS is easier than marmatite in air.
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Junwei
authors.initials: J
authors.lastname: Han
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Tianfu
authors.initials: T
authors.lastname: Zhang
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Kai
authors.initials: K
authors.lastname: Xue
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Wenhua
authors.initials: W
authors.lastname: Li
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Fen
authors.initials: F
authors.lastname: Jiao
authors.affiliation: School of Minerals Processing and Bioengineering, Central South University, 410083, Changsha, Hunan, China.
authors.forename: Wenqing
authors.initials: W
authors.lastname: Qin