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http://dx.doi.org/10.5916/jkosme.2017.41.3.216

Experimental study of NOx reduction in marine diesel engines by using wet-type exhaust gas cleaning system  

Ryu, Younghyun (Korea Institute of Machinery & Materials)
Kim, Taewoo (Techwin Co., Ltd.)
Kim, Jungsik (Techwin Co., Ltd.)
Nam, Jeonggil (Division of Marine Engineering, Mokpo National Maritime University)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.41, no.3, 2017 , pp. 216-221 More about this Journal
Abstract
Diesel engines have the highest brake thermal efficiency among internal combustion engines. Therefore, they are utilized in medium and large transportation vehicles requiring large amounts of power such as heavy trucks, ships, power generation systems, etc. However, diesel engines have a disadvantage of generating large quantities of nitrogen oxides during the combustion process. Therefore, the authors tried to reduce the amount of nitrogen oxides in marine diesel engines using a wet-type exhaust gas cleaning system utilizing the undivided electrolyzed seawater method. In this method, electrolyzed seawater in injected into the harmful gas discharge from the diesel engine using real seawater. The authors investigated the reduction of NO and NOx from the pH value, available chlorine concentration, and the temperature of electrolyzed seawater. The results of this experiment indicated that when the electrolyzed seawater is acidic, the NO oxidation rate in the oxidation tower is higher than that when the electrolyzed seawater has a neutral pH. Likewise, the NO oxidation rate increased with the increase in concentration of chlorine. Further, it was confirmed that the electrolyzed seawater temperature had no effect on the NO oxidation rate. Thus, the NOx exhaust emission value produced by the diesel engine was reduced by means of electrolyzed seawater treatment.
Keywords
Diesel engine; Nitrogen oxides (NOx); Wet-type exhaust gas cleaning system; Seawater electrolysis; NO oxidation;
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Times Cited By KSCI : 8  (Citation Analysis)
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