Abstract
The combustion of fossils fuels is the main source of the environmental problems, such as acid rain, photochemical smog, and ozone depletion. To solve these problems, the appropriate technology to remove acid gasses such as SO2 is urgently required. In this work, SO2 removal was conducted using polypropylene and polysulfone-based hollow fiber membrane contactors. Water and sodium sulfite were used as sorbents. The results showed that the use of sodium sulfite as a sorbent provided 2 times higher SO2 permeation than water. Moreover, permeate flux of polypropylene membrane was higher than polysulfone membrane since the hydrophobic membrane is more suitable as membrane contactor for flue gas cleaning. In addition, a comparison between membrane contactor and conventional scrubber showed that membrane contactor can reduce the contact volume up to 27 times smaller than those used in the conventional scrubber.
Highlights
Most of the world energy production is made up from the combustion of fossil fuels such as oil, coal, and gas. The combustion of these fuels is the main source for environmental problems of major concern such as acid rain, photochemical smog, ozone depletion, and greenhouse effect [1, 2]
In high gas flow rate, an aqueous solution of sodium sulfite provides 2 times higher permeation of SO2 than water. These results show that aqueous solution of sodium sulfite is more suitable than water
Theoretical and experimental investigations to explore the potential application of membrane contactor for flue gas cleaning were carried out
Summary
Most of the world energy production is made up from the combustion of fossil fuels such as oil, coal, and gas The combustion of these fuels is the main source for environmental problems of major concern such as acid rain, photochemical smog, ozone depletion, and greenhouse effect [1, 2]. Chemical absorption with conventional scrubbing tower is the most used technique to capture SO2 from flue gas streams. This technique is characterized by huge space requirements and related high capital costs. The conventional wet scrubbing techniques suffer from a number of deficiencies such as loading, flooding, and entrainment limitation [3]
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