Experimental exploration on NO<i><sub>x</sub></i> diminution by the combined effect of antioxidant additives with SCR in a diesel engine powered by neem biodiesel

Biodiesel is considered as one of the attractive alternatives to fossil diesel fuel. Although biodiesels reduces most of the harmful gas emissions, they normally releases higher NOx emissions compared to fossil diesel. The Selective Catalytic Reduction (SCR) is a wellknown technique used in the OEM industry to mitigate NOx emission. However, this technique may not be suitable for application in low power density engines due to back pressure and clogging issues. On the other hand, Selective Non-Catalytic Reduction (SNCR) is used in relatively large combustion operations ie. boilers and incinerators. The main disadvantage of SNCR technique is the high temperature window for diesel engine exhaust temperature. This study introduces a new design concept, which is a combination of SCR and SNCR systems, for low power density diesel engines. The developed after-treatment system composed of two main parts, injection-expansion pipe and swirl chamber. The working principle is providing maximum mixing of the injected fluid and exhaust gas in the expansion chamber, then creating a maximum turbulence in the swirl chamber. In this regard, NOx emission can be reduced at relatively lower exhaust temperatures without using any catalyst. The CFD models of three design candidates were examined in terms of velocity magnitudes, turbulence intensity and particle residence time to select the optimum physical dimensions. The selected design was manufactured and installed to exhaust system of a 1.3 litre diesel engine. Two fluids distilled water and urea-water solution were injected separately at the same flow rate of 375 ml/min. Exhaust gas emissions of fossil diesel, sheep fat biodieselwaste cooking oil biodiesel blend and chicken fat -cottonseed biodiesel blend were tested. No significant changes in CO2 and HC emissions were observed. However, it was found that distilled water injection reduced CO and NO emissions by about 10% and 6% for fossil diesel; and by about 9% and 7% for biodiesels operation respectively. The urea-water injection led to reductions in CO and NO emissions by about 60% and 13% for fossil diesel; and by about 45% and 15% for biodiesels respectively.

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“…The three possible reaction mechanisms of NOx reduction in the presence of ammonia are illustrated in equations 2, 3 and 4 [20][21][22][23]. (2)…”

Section: Methodology Nox Decomposition Reaction Mechanismmentioning

confidence: 99%

Modified selective non-catalytic reduction system to reduce NOx gas emission in biodiesel powered engines

Masera

Hossain

2021

Fuel

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Section: Introductionmentioning

confidence: 99%

“…Among all blends, 20% blend had identified higher thermal efficiency and lower HC, CO and smoke emission. To control the NO x emission from the exhaust, the combined effect of antioxidant additives with SCR technique has provided in a diesel engine [20]. Senthil Kumar et al [21] investigated the engine performance with Kopak methyl ester the exhaust gas temperature and specific fuel consumption are increased for rich blends of Kapok methyl ester, but the brake thermal efficiency is decreased for the same blends.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on direct injection diesel engine fuelled with addition of titanium dioxide nanoparticle to M. elangi biodiesel for varying injection pressures

Krupakaran¹,

Hariprasasd²,

Gopalakrishna

2019

Env Prog and Sustain Energy

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Nowadays, rapid increase in vehicle population led to increase in demand of fossil fuel. Decrease in availability of crude oil made the researchers to find a renewable alternative fuel, biofuels. Methyl esters are preferred as alternative to petro‐diesel engines. The present experimental study of Mimusops elangi methyl ester (MEME) is used as biodiesel on single cylinder four stroke, direct injection air cooled diesel engine at a constant speed of 1500 rpm at various loads. The general optimum biodiesel blends 20MEME‐80D (20%MEME‐80%Diesel) with optimum of 25 ppm TiO2 nanoparticle additives were taken for the experiment. The injection pressure of the engine is varied from 180 bar to 240 bar in the steps of 20 bar. The results of experimental investigation reported that the change in injection pressure 220 bar with modified fuel (20MEME‐80D + 25 ppm TiO2 nanoparticle) shows better performance and emission characteristics in the diesel engine. © 2019 American Institute of Chemical Engineers Environ Prog, 38:e13146, 2019

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Recent advancements, applications, and technical challenges in fuel additives-assisted engine operations

Ali Ijaz Malik,

Kalam,

Mujtaba Abbas

et al. 2024

Energy Conversion and Management

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Experimental exploration on NO_x diminution by the combined effect of antioxidant additives with SCR in a diesel engine powered by neem biodiesel

Cited by 18 publications

References 19 publications

Modified selective non-catalytic reduction system to reduce NOx gas emission in biodiesel powered engines

Modified selective non-catalytic reduction system to reduce NOx gas emission in biodiesel powered engines

Experimental investigation on direct injection diesel engine fuelled with addition of titanium dioxide nanoparticle to M. elangi biodiesel for varying injection pressures

Recent advancements, applications, and technical challenges in fuel additives-assisted engine operations

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Experimental exploration on NOx diminution by the combined effect of antioxidant additives with SCR in a diesel engine powered by neem biodiesel

Cited by 18 publications

References 19 publications

Modified selective non-catalytic reduction system to reduce NOx gas emission in biodiesel powered engines

Modified selective non-catalytic reduction system to reduce NOx gas emission in biodiesel powered engines

Experimental investigation on direct injection diesel engine fuelled with addition of titanium dioxide nanoparticle to M. elangi biodiesel for varying injection pressures

Recent advancements, applications, and technical challenges in fuel additives-assisted engine operations

Contact Info

Product

Resources

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Experimental exploration on NO_x diminution by the combined effect of antioxidant additives with SCR in a diesel engine powered by neem biodiesel