炭酸ナトリウムによる乾式同時脱塩脱硫

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For the removal of acid gases discharged from municipal solid waste incineration, simultaneous / individual sorption of HCl and / or SO2 by using Na2CO3 was investigated in the temperature range of 473-1073K. The tested gas mixture in N2 balance was set to the respective concentrations as follows: 1000ppm HCl, 200ppm SO2, 5% O2 for simultaneous sorption; 1000ppm HCl for individual HCl sorption; 200ppm SO2, 5% O2 for individual SO2 sorption. The sorption capacity as well as sorption rate for HCl / SO2 sorption of Na2CO3 fine particle (dp <5 μ m) was evaluated by the gas inlet-outlet measured by material balance.As a result, the total capacity of simultaneous sorption of HCl and SO2 was lower than that of individual sorption of HCl or SO2, in the temperature range of 473-673K. On the other hand, the total capacity of HCl and SO2 for simultaneous sorption of HCl and SO2 was increased with temperatures of the range of 873-1073K. The sum of HCl and SO2 sorption amount was about 1.4 times larger than that of individual sorption of HCl or SO2 at 1073K. SEM / EDS analysis revealed that the amount of Cl distributed on the surface of the particle was about 20 times larger than that of S heated at 673K. This result indicated that sodium chloride formed on the surface of particles prevented SO2 to react with Na2CO3.An effective diffusion coefficient of HCl for chlorination of Na2CO3 was in the magnitude 10-11, which was about twice higher than that of SO2 under simultaneous sorption of HCl and SO2.
社団法人資源・素材学会の論文
2005-03-25

炭酸ナトリウムによる乾式同時脱塩脱硫

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