(Q3)(Q4)The following are advantages of this technology: SO2 is 95 per cent are common removed but the system can attain as high as 98 per cent SO2 removal, this technology is adequately and commercially viable, the reagents that are used in the process of SO2 are readily available, the waste gypsum which is produced is stable for landfills and cannot be blend with fly ash and lime (Soud, 2000). The following are the disadvantage of Flue gas desulfurization: the system will circulate large quantities of slurry which will make pumping to be high, therefore high power consumption, the pressure drop which is found across the absorber will increase the induced draft (ID) fan power consumption, high potential for corrosion will require engineers to use costly corrosion resistant materials during construction, and lastly, large volume of gypsum will depend on the market that is available near the plant (Soud, 2000).
Fractional distillation Technology (Q1)This technology involves separation of a mixture into it’s constitute component parts or fractions, such as separation gases by their boiling point and this is achieved when these gases have been heat to a temperature at which several constitute gases compound will evaporate (Gulf Research & Development Co, 2006), actually fractional distillation is a special type of distillation.
The component part of gases will boil at less than 25 °C from each other and this is under a pressure of 1 atm, but if the different in boiling points of respective gases is greater than 25 °C, then a simple distillation process will be used. Consider two gases, one of the gases evaporates at 78.5 °C and the other gas evaporates at 100 °C, a person should be able to separate the two individual components of gases by fractional distillation.
(Q3)(Q2) However, a mixture of two gases will be volatile than the individual gases but when the gases mixture is gentle heated, that gas which is more volatile will separate from the rest of the other gases first. Fractional distillation technology is widely used in refineries to separate crude oil and natural gases into useful fractions. The fractions consists of different boiling points, those gases with higher boiling points will consist of larger molecules and are more difficult to ignite and to burn.
At all the time the new feeds in the fractional distillation is continuously added to the distillation column, and the constitute gases are continuously removed (Gulf Research & Development Co, 2006) (Q4). The following are advantages of fractional distillation: it is a cheap way of separating gases into its constituent components when you compare it with other technology, it is the fastest way of gas purifications, and lastly it is easy to construct (Gulf Research & Development Co, 2006).
The following are its disadvantages: the setup process of fractional distillation is more complicated than a simple distillation, it will take longer for gases to be distilled, fractional distillation process will consume a lot of energy than a simple distillation, and lastly the constitute gases are sometime lost during fractional distillation and therefore the recovery of purified gases will be less than it was expected from the crude gases (Gulf Research & Development Co, 2006).