Review of Nitrogen Oxides (NOx) Reduction Methods Used on Marine Diesel Engine

Abstract

Reducing nitrogen oxide (NOx) emissions is of great importance in terms of environmental sustainability and air quality. This study is a review that examines various applications aimed at reducing NOx emissions. Below is a summary of the evaluation of technologies, including the common rail system, exhaust gas recirculation (EGR), Miller cycle, direct water injection, emulsified fuel, and selective catalytic reduction (SCR). The common rail system, EGR, and Miller cycle can generally be considered as combustion control-based methods for reducing NOx within the cylinder. Direct water injection and emulsified fuel aim to lower temperatures inside the cylinder by utilizing the high internal heat of evaporation of water. Selective catalytic reduction is a technology where NOx in the exhaust gas is converted into nitrogen gas and water vapor through the use of a catalyst. This study evaluates the effectiveness and applicability of various technologies used to reduce NOx emissions. Each method may have different advantages and disadvantages. Additionally, there may be certain limitations and variations depending on the application areas of these methods. Therefore, a careful assessment is necessary to determine the most suitable technology or combination of technologies for reducing NOx emissions.

Keywords

• Marine diesel engine
• NOx
• EGR
• Emulsified fuel
• SCR

Gemi Dizel Motorunda Azot Oksitleri (NOx) İndirgeme Yöntemlerinin İncelenmesi

Abstract

Azot oksit emisyonlarının azaltılması, çevresel sürdürülebilirlik ve hava kalitesi açısından büyük önem taşıyan bir konudur. Bu çalışma, NOx emisyonlarını azaltmaya yönelik çeşitli teknolojilerin incelendiği bir derleme çalışmasıdır. Aşağıda, common rail sistemi, egzoz gazlarının geri dönüşümü, Miller çevrimi, suyun direct enjeksiyonu, emülsife yakıt ve seçici katalitik indirgeme gibi teknolojilerin incelenmesine yönelik bir özet sunulmuştur. Common rail sistemi, egzoz gazlarının geri dönüşü ve miller çevrimi genel olarak silindir içindeki yanmanın kontrolüne dayalı NOx indirgeme yöntemleri olarak düşünülebilir. Su enjeksiyonu ve emülsife yakıt ise suyun yüksek buharlaşma iç ısısından faydalanarak silindir içindeki sıcaklıkların düşürülmesini amaçlamaktadır. Seçici katalitik indirgeme ise egzoz gazında bulunan NOx'un bir katalizör yardımıyla azot gazına ve su buharına dönüştürüldüğü bir teknolojidir. Bu çalışma, NOx emisyonlarını azaltmak için kullanılan çeşitli teknolojilerin etkinliğini ve uygulanabilirliğini değerlendirmektedir. Her bir yöntem, farklı avantajlara ve dezavantajlara sahip olabilmektedir. Bunun yanında, yöntemlerin bazı kısıtlamaları da olabilir ve uygulama alanlarına bağlı olarak farklılık gösterebilir. Bu nedenle, NOx emisyonlarının azaltılması için en uygun teknoloji veya teknoloji kombinasyonunu belirlemek için dikkatli bir değerlendirme yapılması gerekmektedir.

Keywords

• Gemi dizel motorları
• NOx
• EGR
• emülsife yakıt
• SCR

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