From 2015, Emissions of SOx from marine diesel engines will be reduced to one tenth of current level(1% S→0.1%S), from the current sulphur content of fuel oil limit 3.5% will be reduced to 0.5% by 2020 in Global Area, so, traditional method of using Fuel Switching to reduce SOx emission reached the ...
From 2015, Emissions of SOx from marine diesel engines will be reduced to one tenth of current level(1% S→0.1%S), from the current sulphur content of fuel oil limit 3.5% will be reduced to 0.5% by 2020 in Global Area, so, traditional method of using Fuel Switching to reduce SOx emission reached the limit. Therfore, post-treatment of ship exhaust gases is becoming a great attention. Because wet scrubber can be used to reduce not only SOx but PM10 and have potential of reducing NOx by developing technology, this method is rated as emission reduction technology of pollutants exhausted from ship. The main purpose of this paper is to check SOx absorption efficiency by using alkalinity absorbent in closed loop system whether reaching SOx emission limit.
To know removal efficiency and optimal operation condition of closed loop system scrubber, we designed and produced scrubber, performed variable of absorbent types, SO2 concentrations and L/G ratio experiments.
As result of NaOH, KOH, Ca(OH)2 absorption experiment, NaOH absorber’s SO2 absorption efficiency was the best, KOH absorber was second and Ca(OH)2 absorber was third. In case of KOH absorber, SO2 removal efficiency 96.8% is similar to NaOH’s but it is more expensive than the other so that NaOH is chosen to be the most suitable absorber. As a result of SO2 absorption experiments by concentration and L/G ratio of the most suitable absorber NaOH, high concentration and high L/G ratio make removal efficiency higher by increasing concentration gradient and contact of Liquids and gases. In case of designed and produced scrubber, column cross-section area is 7.854×10-3m2, diameter 0.1m, packing’s theoretical height is 0.5m, so 0.8m was chosen to be the scrubber’s final height by considering safety factor.
As a final result, NaOH absorber’s removal efficiency was upper than 97% in optimum operation condition. In addition, generated salts in absorbing SO2 process are melting in the operation condition, so desinged scrubber in this study can be so for closed loop system in ship exhaust gas post-treatment.
From 2015, Emissions of SOx from marine diesel engines will be reduced to one tenth of current level(1% S→0.1%S), from the current sulphur content of fuel oil limit 3.5% will be reduced to 0.5% by 2020 in Global Area, so, traditional method of using Fuel Switching to reduce SOx emission reached the limit. Therfore, post-treatment of ship exhaust gases is becoming a great attention. Because wet scrubber can be used to reduce not only SOx but PM10 and have potential of reducing NOx by developing technology, this method is rated as emission reduction technology of pollutants exhausted from ship. The main purpose of this paper is to check SOx absorption efficiency by using alkalinity absorbent in closed loop system whether reaching SOx emission limit.
To know removal efficiency and optimal operation condition of closed loop system scrubber, we designed and produced scrubber, performed variable of absorbent types, SO2 concentrations and L/G ratio experiments.
As result of NaOH, KOH, Ca(OH)2 absorption experiment, NaOH absorber’s SO2 absorption efficiency was the best, KOH absorber was second and Ca(OH)2 absorber was third. In case of KOH absorber, SO2 removal efficiency 96.8% is similar to NaOH’s but it is more expensive than the other so that NaOH is chosen to be the most suitable absorber. As a result of SO2 absorption experiments by concentration and L/G ratio of the most suitable absorber NaOH, high concentration and high L/G ratio make removal efficiency higher by increasing concentration gradient and contact of Liquids and gases. In case of designed and produced scrubber, column cross-section area is 7.854×10-3m2, diameter 0.1m, packing’s theoretical height is 0.5m, so 0.8m was chosen to be the scrubber’s final height by considering safety factor.
As a final result, NaOH absorber’s removal efficiency was upper than 97% in optimum operation condition. In addition, generated salts in absorbing SO2 process are melting in the operation condition, so desinged scrubber in this study can be so for closed loop system in ship exhaust gas post-treatment.
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