Experiment Investigation Absorption of Mercury by Modified Fly Ash Dust Layer Attaching on Filter

Abstract:

As to figure out the effect that modified fly ash, which is prepared by fly ash –CaO, and modified fly ash dust layer attached on the surface of the filter material adsorbed elemental mercury, experimental studies are administrated in a laboratory-scale fixed bed reactor system with gaseous elemental mercury produced by a mercury vapor generator and simulated flue gas composition. The experimental results indicated that the adsorption performance of fly ash and CaO relatively poor. The proportion of CaO in the modified fly ash will affected the mercury removal efficiency of the absorbent which prepared by fly ash and CaO. It will be an optimal effect when the blend ratio of the flying ash and CaO is 2 to 1, and the maximum removal efficiency is up to 34%.As the adsorption temperature increases the removal efficiency of the modified fly ash deteriorates. The efficiency of dust layer attaching on the surface of the filter material is getting higher with the larger porosity of dust layer and smaller particle material size.

• Periodical: Advanced Materials Research (Volumes 393-395)
• Pages: 1212-1216
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.393-395.1212
• Online since: November 2011
• Authors: Huan Wang, Yong Fa Diao
• Keywords: Dust Layer, Hg⁰ Removal Rate, Modified Fly Ash, Simulated Flue Gas

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