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• W2097986654 abstract "Desulfurization technics has been popularly applied to reduce the harmfulness of sulfur dioxide. The reaction characteristics of flue gas desulfurization by magnesia were studied using a lab-scale bubbling apparatus. The effects of concentration of the reagent, flux of the flue gas, concentration of sulfur dioxide, temperature of the absorbent, and bubbling depth on the desulfurization efficiency was investigated with the parameters close to the practice. The experimental results indicate that the desulfurization efficiency is greatly influenced by flue gas flux, sulfur dioxide concentration and bubbling depth. The desulfurization reaction is controlled by the mass transfer of sulfur dioxide from the gas to the reagent solution. Sulfur dioxide is the major contributor to form acid rain as a toxic gas, which has done great harm to people's health. China is a large energy-consumed country. Coal is not only to generate electricity, but also use for industrial boilers.Therefore FGD, i.e. flue gas desulfurization, is a promising technics and will be applied widely in China. Compared with the limestone scrubbing, magnesia desulfurization will keep high efficiency (1) at low liquid-gas ratio about 3~5, while 15-20 in limestone scrubbing. Thus, it has advantages in less field occupying, investment and lower energy consuming. Furthermore, the technics of magnesia desulfurization is simple and jams and accumulation of filth rarely occur, which is especially suitable for the flue gas polution control in middle or small scale of industrial boilers. At the same time, magnesium resource in China is abundant and centralizing and the reserves and quality ranks the top of the world. Expecially the area Liaodong is in possession of 2.5 billion tons amounts and 3 times of former USSR, that is in the second possession in the world. Therefore, it is necessary to explore magnesium desulfurization for the national condition. It is similar to calcium oxide desulfurization that magnesia dissolves into the water and forms magnesium hydroxide, whch reacts with sulfur dioxide in the flue gas into magnesium sulfite. Moreover, magnesium sulfite will be oxided to sulfate (2,3) in practical conditions. Research of magnesia desulfuriztion started relatively later in China. The techolics primarily depends upon import and the applying scale is small. Thus, the reasearch on reaction characteristic of magnesium oxide desulfurization is seldom reported. Lijuan etal (4) prepared magnesia by calcining in high temperature and studied the relations between the activity and temperature and crystal structure. Cuike etal (5) investigated the effect of pH on desulfurization effciency by bubbling experiments in lab and industrial scale. Jingjiguo etal (6) established the mathematics models of desulfurization process using double-membrane theory. The desulfurization efficiency in pilot-scale was deduced and sensitivity of parameters analyzed. However, the published works on the reaction characteristic of magnesia desulfurization are not systemic enough and further researchs are yet to be carried out. The reaction characteristic of magnesia desulfurization was studied by using a bubbling reaction apparatus in lab-scale. Effect of several factors on desulfurization efficiency were investigated such as absorbent centration, flux of the flue gas, sulfur dioxide concentration, temperature of reagent, and bubbling depth ect. The results would provide reference for design and function of magnesium desulfurization process." @default.
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• W2097986654 date "2009-06-01" @default.
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• W2097986654 title "Study on the Reaction Characteristics of Flue Gas Desulfurization by Magnesia" @default.
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• W2097986654 doi "https://doi.org/10.1109/icbbe.2009.5163522" @default.
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