Ag-Fe3O4@rGO ternary magnetic adsorbent for gaseous elemental mercury removal from coal-fired flue gas. (1st March 2019)

• Record Type: Journal Article
• Authors: Ma, Yongpeng; Mu, Bailong; Zhang, Xiaojing; Xu, Haomiao; Qu, Zan; Gao, Li; Li, Bo; Tian, Juanjuan
• Is Part Of: Fuel. Volume 239(2019)
• Page Start: 579
• Page End: 586
• Publication Date: 2019-03-01
• Subjects: Elemental mercury -- Silver -- Graphene -- Adsorption -- Flue gas; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2018.11.065
• Languages: English
• ISSNs: 0016-2361

Abstract

Abstract: Ag nano-particles (NPs) with high dispersion possess the capacity for elemental mercury (Hg 0 ) removal in low temperature. To further enhance its thermo-stability and electron transfer ability, Ag-Fe3 O4 @rGO ternary magnetic composite was synthesized for gaseous Hg 0 capture. Results indicated that such composite has a Hg 0 removal performance with higher than 92% removal efficiency at 100 °C. The ternary composite has a higher Hg 0 removal performance than that of pure rGO and Fe3 O4 @rGO. The physical-chemical characterization results indicated that Ag nano-particles in-situ grow on the surface of Fe3 O4 @rGO support. The large surface area of rGO supply efficient reaction room for Hg and Ag atoms. Ag-Hg amalgam is ascribed to the mercury uptake mechanism. The spent materials can be regenerated by a simple thermal-desorption method. In addition, this magnetic material provide an opportunity that can be separated from fly ashes when used in real flue gas.