| Summary: | 碩士 === 國立臺灣大學 === 環境工程學研究所 === 89 === Abstract
In recent years, a great deal of public attention has been drawn to municipal solid waste treatment in Taiwan. They realize that there’s no enough space for all the solid waste to be landfilled without investigate incineration. Therefore, incineration has become the dominant method for municipal solid waste. This study was to investigate the feasibility of CO2 reduction in emission gas from municipal waste incinerator while incinerating solid waste.
In this study, we used chemical absorption to remove CO2 from emission gas. The experiments were conducted under following condition: the L/G ratio 4.5~9.0 L/m3, the NaOH concentration 1~5N, CO2 concentration 10%~20%(V/V), and operation temperature 30~50℃.
The results show that the removal efficiency of CO2 at 1N, 2N, 3N, 4N, and 5N of NaOH is 50.7%, 66.0%, 71.3%, 74.0%, and 76.0%, respectively. However, removal efficiency of CO2 can not be increased without limitation. This is because the removal efficiency of CO2 is related with the effect of mass transfer. Thus, we took a series of experiments of viscosity. And all of viscosity results indicate that we can not neglect the effect of mass transfer. As for the experiment of L/G ratio, a mathematical regression equation: y = -1.037 x2+19.55 x-36.2 , where y is removal efficiency of CO2(%) and x is L/G ratio(L/m3). As for experiment of CO2 concentration, there’s two results. One of these shows that removal efficiency do nothing with inlet concentration, when alkalinity is sufficient. Another shows that removal efficiency decreases with inlet concentration, when the alkalinity is not sufficient. As for experiment of temperature, we confirm that removal efficiency of CO2 increase with temperature in the range of 30~50 ℃.
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