Selective Sulfur Dioxide Absorption from Simulated Flue Gas Using Various Aqueous Alkali Solutions in a Polypropylene Hollow Fiber Membrane Contactor: Removal Efficiency and Use of Sulfur Dioxide

Hyun Sic Park, Dongwoan Kang, Jo Hong Kang, Kwanghwi Kim, Jaehyuk Kim and Hojun Song
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Hyun Sic Park: Green Materials & Processes R&D Group, Korea Institute of Industrial Technology, 55 Jongga-ro, Jung-gu, Ulsan 44413, Korea
Dongwoan Kang: Green Materials & Processes R&D Group, Korea Institute of Industrial Technology, 55 Jongga-ro, Jung-gu, Ulsan 44413, Korea
Jo Hong Kang: Green Materials & Processes R&D Group, Korea Institute of Industrial Technology, 55 Jongga-ro, Jung-gu, Ulsan 44413, Korea
Kwanghwi Kim: Green Materials & Processes R&D Group, Korea Institute of Industrial Technology, 55 Jongga-ro, Jung-gu, Ulsan 44413, Korea
Jaehyuk Kim: Department of Civil and Environmental Engineering, Pusan National University, 2 Busandaehak-ro, 63beon-gil, Geumjeong-gu, Pusan 46241, Korea
Hojun Song: Green Materials & Processes R&D Group, Korea Institute of Industrial Technology, 55 Jongga-ro, Jung-gu, Ulsan 44413, Korea

IJERPH, 2021, vol. 18, issue 2, 1-15

Abstract: Hollow fiber membrane contactors (HFMCs) provide a large specific surface area. Thus, their significantly reduced volume provides an advantage compared to the conventional gas–liquid contactor. In this study, the selective removal efficiency of flue gas, in which sulfur oxide (SO 2 ) and carbon dioxide (CO 2 ) coexist, was measured using a polypropylene (PP) HFMC with such advantages. To increase the selective removal efficiency of SO 2 , experiments were conducted using various alkaline absorbents. As a result, with 0.05 M ammonia solution, the removal efficiency of 95% or more was exhibited with continuous operation for 100 h or more. We confirmed that the absorbent saturated by the once-through mode was aqueous ammonium sulfate ((NH 4 ) 2 SO 4 ) solution and could be used as a fertilizer without additional processing.

Keywords: desulfurization; hollow fiber membrane contactor (HFMC); polypropylene (PP); sulfur oxide (SO 2 ); ammonium sulfate ((NH 4 ) 2 SO 4 ); once-through mode (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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