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Experiment of the macromolecular chitosan adsorbent to remove element mercury in the simulative flue gas of coal combustion |
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Abstract An experiment was conducted to study the Chitosan (CS) sorbent’s adsorption efficiency of element mercury in pure N2 and simulative coal-fired flue gas. The element mercury was difficult to remove in the pure N2, the adsorption efficiency was 28.85% at 60℃, but the CS sorbent could adsorb Hg0 effectively with the temperature’s rising, at 120℃ the adsorption efficiency was 38.46%. And the SOx and NOx could promote the element mercury adsorption efficiency, at 120℃, in the simulative coal-fired flue gas, the balance adsorption efficiency of the chitosan sobent was 48.05% and the average adsorption efficiency was almost up to 68%. By infrared spectrum analyzing, the results showed the mechanism of chitosan sorbent adsorbing mercury was that 2 free amino and 2 hydroxyls(-OH)chelated 1 mercury to be a ring.
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Received: 16 November 2009
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