Experimental Study Of Removal Of Multiple Pollutant By Activated Carbon Fibers

The coal power plants releases SO₂, NOX, Hg, VOCs to the atmosphere, and without control the released pollutants will contaminate the environment and harm health of human. The activated carbon can dissolve this well. However, activated carbon fiber (ACF) is more effective than activated carbon. ACF were immersed into diluted sulfuric acid and then ammonia, which increase the oxygen function groups and nitrogen functional groups. But the distributing of pore distribution changes little.And we found that modified ACF has higher efficiency on the removal of volatile organic compounds (VOCs).Toluene were used as representatives of VOCs. The results showed that the ability of ACF removing VOCs increases little with the concentration of the O2. And the efficiency seldomly increase when the oxygen concentration exceeds 5%. However, catalytic oxidation is not the most important. The suitable temperature for toluene removal is 40℃. Vapor is against adsorption of VOCs.The SO₂ and NO both against the removal of VOCs. And the VOC removal effect is decrease with the SO₂ or NO, no matter if the vapor is exist. If the O2 exist, the effect of the removal of VOCs when the NO, SO₂ and VOCs all exist< the effect when NO and VOCs exist< the effect when both NO and VOCs exist < when only VOCs exist. If the O2 and vapor both exist, the effect of the removal of VOCs when the NO, and VOCs all exist< the effect when NO, SO₂ and VOCs exist< the effect when both NO and VOCs exist < when only VOCs exist.No matter if vapor exist, the VOCs against the removal of the NO and SO₂. It can desorb the NO and SO₂. Although NO can enhance the removal of SO₂ by ACF, when VOCs exist, the enhancement is unconspicuous. Vapor is harm to both VOCs and NO, but when VOCs and NO both exist, vapor does more harm to the removal of VOC. When both VOCs and SO₂ exist, vapor still enhance the removal of SO₂. But when VOCs, NO, SO₂ all exist, low concentration of vapor (0.2%) affect little to the removal of SO₂. Keyword: Activated carbon fiber; modification; VOCs; simultaneously remove...