Combustion characteristics and NOX emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine

Kim, Yung-Jin; Kawahara, Nobuyuki; Tsuboi, Kazuya; Tomita, Eiji

doi:10.1016/j.apenergy.2016.08.152

Cited by 75 publications

(17 citation statements)

References 29 publications

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“…Studies on the simultaneous combustion of liquid and gas biofuels [44,49] have been conducted. Research has been carried out where spark ignition engines are used for research [50], as well as with compression ignition, often in the form of power generators [51,52]. As a fuel, raw biogas is used in laboratory tests [53,54], as well as in long-term operational research [52].…”

Section: Introductionmentioning

confidence: 99%

Impact of Biogas and Waste Fats Methyl Esters on NO, NO2, CO, and PM Emission by Dual Fuel Diesel Engine

et al. 2019

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The aim of this study was to perform a comparative analysis of the unit gas emission value in the exhaust of a dual fuel diesel engine. The results of the effects of a diesel engine’s applications in biogas plants and the method for calculating mass gas emissions per unit of produced electricity are shown. The test was performed using a two-cylinder, naturally aspirated, liquid-cooled diesel engine. The diesel engine powered a generator connected to the grid. The engine was fed with liquid fuels—waste cooking oil methyl ester (UCOME) and diesel fuel (DF)—and with a gas fuel, biogas (BG). The engine ran at a constant rotational speed (2000 rpm ± 30 rpm) with variable load. The gas analyzer measured the amount of CO, NO, NO2, and PM (particulate matter) in exhaust gas. This gas content share was then converted to mass per engine generated energy unit. This experiment showed the effect of BG introduced to the intake manifold on fuel combustion, as well as an increase in CO and NO2 emission and decrease in NO and PM. In terms of dependence of exhaust emissions on the type of liquid fuel used, the use of UCOME as opposed to diesel fuel resulted in PM reduction and increase of NO emissions.

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Section: Introductionmentioning

confidence: 99%

Impact of Biogas and Waste Fats Methyl Esters on NO, NO2, CO, and PM Emission by Dual Fuel Diesel Engine

et al. 2019

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“…Biyogaz buji ile ateşlemeli motorlarda önemli değişiklikler yapılmadan kullanılabilir [6], [7]. Ayrıca, homojen dolgulu sıkıştırma ile ateşlemeli motor [1], [2] buji kullanılan sıkıştırma ile ateşlemeli motor [8], [9] gibi uygulamalar literatürde yer almaktadır.…”

Section: Introductionunclassified

“…biyogaz yakıtlı buji ateşlemeli bir motorda, motor momentini, CH4 ve CO2 oranlarını değiştirip, yakıt/hava oranını, emme havası ve yakıt debisi ile kontrol ettikleri çalışmalarında tüm deney şartlarında NOx emisyonlarının düştüğünü bildirmişlerdir. Yazarlar bu durumun stokiyometrik yakıt/hava oranlarında silindir içerisinde bulunan CO2 miktarının artışına bağlamışlardır [6].…”

Section: Introductionunclassified

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The effect of diesel fuel amount on emissions ın a diesel-biogas dual fuel engine

Yılmaz¹,

Yavuz²,

Gümüş³

2020

Pamukkale J Eng Sci

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İçten yanmalı motorların enerji ihtiyaçları genellikle fosil yakıtlardan karşılanmaktadır. Fosil yakıtların gün geçtikçe tükenmelerine bağlı olarak yenilenebilir enerji kaynakları araştırmacıların ilgisini çekmektedir. Biyogaz organik atıklardan üretilen alternatif bir yakıttır. Bu çalışmada dizel-biyogaz çift yakıtlı bir motorda dizel yakıt miktarının egzoz emisyonlarına etkisi incelenmiştir. Deneyler 1.6 l dört zamanlı, su soğutmalı, aşırı doldurmalı, ortak hatlı yakıt püskürtme sistemine sahip dört silindirli bir dizel motorda gerçekleştirilmiştir. Motorun elektronik kontrol ünitesinin orijinal ayarlarında herhangi bir değişiklik yapılmamıştır. Çift yakıtlı çalışmalarda motorun enerji ihtiyacının %20'si, %30'u, %40'ı ve %50'si dizel yakıt ile karşılanmıştır. Deneylerde motor momenti 40 Nm, 60 Nm ve 80 Nm arasında değiştirilmiş ve motor devri 1750 d/d'da sabit tutulmuştur. HC, CO2 ve NOx emisyonları dizel yakıt miktarının artışına bağlı olarak azalırken is emisyonu artmıştır. Silindire gönderilen biyogaz miktarının artması hem ön karışımlı yanma fazında yanan yakıt miktarını hem de NOx emisyonlarını arttırmıştır. Biyogazın içeriğinde bulunan CO2 ise yakıt hava karışımını seyrelterek HC ve is emisyonlarını yükseltmiştir.Fossil fuels generally meet the energy demand of internal combustion engines. Due to the run out fossil fuels day by day, renewable energy sources catch the researchers' attentions. Biogas is a renewable alternative fuel produced from organic wastes. In this paper, the effect of diesel fuel amount on the exhaust emissions of the biogas-diesel dual fuel engine was investigated. Experiments were carried out on a four stroke, four cylinder, water cooled, turbocharged, common-rail diesel engine. No changes were made on original settings of electronic control unit of the engine. The energy demands of dual fuel engine were supplied by diesel fuel about 20%, 30%, 40% and 50%. All tests were conducted at 1750 rpm constant speed, 40 Nm, 60 Nm and 80 Nm engine loads. Depending on increasing diesel fuel amount, HC, CO2 and NOx emissions decreased but soot emissions raised. The increase in the amount of biogas sent to the cylinders increased both the amount of fuel burned in the premixed combustion phase and the NOx emissions. The CO2 contained in the biogas increased HC and soot emissions by diluting the fuel-air mixture.

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“…Despite the positive effect of CO 2 in the biogas on reducing pollutant emission, this diluent tends to increase ignition delay periods and reduce flame propagation speeds resulting in a drop in engine thermal efficiencies [7]. One potential way of countering this, without having an adverse effect on emission levels, is to add hydrogen (H 2 ) to the biogas mixture.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation studies on performance, soot and NO_xemissions of dual‐fuel engine fuelled with hydrogen enriched biogas mixtures

Nam

et al. 2018

IET Renewable Power Generation

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This study analyses the effects of hydrogen concentration enriched biogas on indicated engine cycle work, soot and NO x emissions of dual-fuel engine. The results show that if advance injection angle of the engine is fixed at the same value as biogas only mode operation, peak value of in-cylinder pressure increases significantly but indicated engine cycle work is only slightly improved with an increase in hydrogen concentration. Optimum advance injection angle decreases as increasing hydrogen concentration in the fuel mixture. At a given engine speed, NO x emissions decrease with increasing equivalence ratio whereas soot emissions increase almost proportionally with the equivalence ratio. At a given equivalence ratio, NO x emission increases with the increasing hydrogen concentration in fuel mixture whereas soot emission decreases contrarily. The maximum soot peak value is obtained with slightly rich mixture at equivalence ratio of around 1.1. Lean burn mixture and high hydrogen concentration result in extremely low soot concentration. Soot emission is practically negligible at equivalence ratio of about 0.9 and 20% hydrogen concentration in mixture with biogas. As hydrogen concentration increases, the decrease of optimum advance injection angle reduces simultaneously both soot and NO x emissions.

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Combustion characteristics and NOX emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine

Cited by 75 publications

References 29 publications

Impact of Biogas and Waste Fats Methyl Esters on NO, NO2, CO, and PM Emission by Dual Fuel Diesel Engine

Impact of Biogas and Waste Fats Methyl Esters on NO, NO2, CO, and PM Emission by Dual Fuel Diesel Engine

The effect of diesel fuel amount on emissions ın a diesel-biogas dual fuel engine

Numerical simulation studies on performance, soot and NO_xemissions of dual‐fuel engine fuelled with hydrogen enriched biogas mixtures

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Combustion characteristics and NOX emissions of biogas fuels with various CO2 contents in a micro co-generation spark-ignition engine

Cited by 75 publications

References 29 publications

Impact of Biogas and Waste Fats Methyl Esters on NO, NO2, CO, and PM Emission by Dual Fuel Diesel Engine

Impact of Biogas and Waste Fats Methyl Esters on NO, NO2, CO, and PM Emission by Dual Fuel Diesel Engine

The effect of diesel fuel amount on emissions ın a diesel-biogas dual fuel engine

Numerical simulation studies on performance, soot and NOxemissions of dual‐fuel engine fuelled with hydrogen enriched biogas mixtures

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Numerical simulation studies on performance, soot and NO_xemissions of dual‐fuel engine fuelled with hydrogen enriched biogas mixtures