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《Environmental Science & Technology》 2009-02
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Performance of Fly Ash/Lime Sorbents for Simultaneous Removing SO_2 and NO_X from Flue Gas

QIAN Feng, QIU Xiao-peng, LI Xiao-yan (School of Chemical and Environmental Engineering,Beijing Technology and Business University,Beijing 100037,China)  
Sorbents were prepared with fly ash and lime in hydration,with discussion of characteristics in specific surface and pore structure of sorbents and their performance in desulfurization and denitrification. Conditions of hydration such as ratio of fly ash to lime,hydration time and hydration pressure were investigated,results showed that specific surface area and pore volume of sorbents were much larger than that of fly ash or lime as materials. Specific surface area of sorbents was close to 97.55m2/g at the most,and pore volume increased 10~100 times. Ratio of fly ash and lime had important influence with attribute of macro structure. Results showed that when ratio of fly ash and lime was 1 to 1 or the specific area was larger than 40m2/g,median pore diameter was about 250~270A,the sorbents had better effect of desulfurization and denitrification.
【CateGory Index】: X701.3
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