A relative assessment of emulsification and water injection methods to mitigate higher oxides of nitrogen emissions from biodiesel fueled light-duty diesel engine

Fuel ◽  
2022 ◽  
Vol 308 ◽  
pp. 121926
Author(s):  
Sudarshan Gowrishankar ◽  
Anand Krishnasamy
Keyword(s):  
Diesel Engine ◽  
Water Injection ◽  
Oxides Of Nitrogen ◽  
Nitrogen Emissions ◽  
Light Duty ◽  
Injection Methods

On the Premixed Combustion in a Direct-Injection Diesel Engine

1987 ◽  
Vol 109 (2) ◽  
pp. 187-192 ◽  
Author(s):  
A. C. Alkidas
Keyword(s):  
Diesel Engine ◽  
High Speed ◽  
Engine Speed ◽  
Direct Injection ◽  
Premixed Combustion ◽  
Injection Timing ◽  
Oxides Of Nitrogen ◽  
Nitrogen Emissions ◽  
Direct Injection Diesel Engine ◽  
Diffusion Burning

The factors influencing premixed burning and the importance of premixed burning on the exhaust emissions from a small high-speed direct-injection diesel engine were investigated. The characteristics of premixed and diffusion burning were examined using a single-zone heat-release analysis. The mass of fuel burned in premixed combustion was found to be linearly related to the product of engine speed and ignition-delay time and to be essentially independent of the total amount of fuel injected. Accordingly, the premixed-burned fraction increased with increasing engine speed, with decreasing fuel-air ratio and with retarding injection timing. The hydrocarbon emissions did not correlate well with the premixed-burned fraction. In contrast, the oxides of nitrogen emissions were found to increase with decreasing premixed-burned fraction, indicating that diffusion burning, and not premixed burning, is the primary source of oxides of nitrogen emissions.

Influence of Compression Ratio, EGR Rate and Main Injection Fuel Quantity on Combustion and Emissions in a PCCI Diesel Engine

2014 ◽  
Vol 953-954 ◽  
pp. 1386-1391
Author(s):  
Sen Lin Xiao ◽  
Wan Chen Sun ◽  
Jia Kun Du ◽  
Guo Liang Li ◽  
Man Zhi Tan
Keyword(s):  
Diesel Engine ◽  
Compression Ratio ◽  
Combustion Process ◽  
Compression Ignition ◽  
Oxides Of Nitrogen ◽  
Nitrogen Emissions ◽  
Peak Heat Release Rate ◽  
Air Mixing ◽  
Main Injection ◽  
Gas Recirculation

In this study, simulation model on combustion process of a diesel engine was developed and the results were validated by experiments. Then the compression ignition was switched into PCCI (Premixed Charge Compression Ignition) in order to understand the effects of individual parameters on PCCI combustion and provide the reference for the further studies of testing and simulation. The results illustrate that the lower compression ratio extends the ignition delay and enhances fuel-air mixing and improves PCCI combustion. In addition, the oxygen concentration in cylinder is highly diluted as the EGR (Exhaust Gas Recirculation) rate increases and the NOx (Oxides of nitrogen) emissions are effectively depressed as EGR rate over 30%. Moreover, the reduction of main injection fuel quantity results in a decrease reactivity and peak heat release rate in combustion.

Formation and Control of Oxides of Nitrogen Emissions From Gas Turbine Combustion Systems

1972 ◽  
Vol 94 (4) ◽  
pp. 271-278
Author(s):  
P. P. Singh ◽  
W. E. Young ◽  
M. J. Ambrose
Keyword(s):  
Gas Turbine ◽  
Water Injection ◽  
Flame Temperature ◽  
Oxides Of Nitrogen ◽  
Nitrogen Emissions ◽  
Primary Zone ◽  
Gas Turbine Combustion ◽  
Combustion Systems ◽  
And Control

Results of an investigation into the levels of oxides of nitrogen in Westinghouse gas turbine exhausts are presented. Various methods of controlling the amounts of these emissions were considered. The oxides of nitrogen were reduced most effectively by lowering the maximum flame temperature. This was done by either leaning the primary zone of the combustor, by water injection in the primary zone, or by using vitiated combustion air. Reductions in NOx levels to 15 percent of original values were achieved.

STUDI PENENTUAN KOMPOSISI OPTIMUM CAMPURAN BAHAN BAKAR BIODIESEL–PETRODIESEL

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Soni S. Wirawan dkk
Keyword(s):  
Carbon Monoxide ◽  
Particulate Matter ◽  
Diesel Engine ◽  
Fuel Consumption ◽  
Diesel Fuel ◽  
Cetane Number ◽  
Price Policy ◽  
Oxides Of Nitrogen ◽  
Fuel Price ◽  
Biodiesel Blend

Biodiesel is a viable substitute for petroleum-based diesel fuel. Its advantages are improved lubricity, higher cetane number and cleaner emission. Biodiesel and its blends with petroleum-based diesel fuel can be used in diesel engines without any signifi cant modifi cations to the engines. Data from the numerous research reports and test programs showed that as the percent of biodiesel in blends increases, emission of hydrocarbons (HC), carbon monoxide (CO), and particulate matter (PM) all decrease, but the amount of oxides of nitrogen (NOx) and fuel consumption is tend to increase. The most signifi cant hurdle for broader commercialization of biodiesel is its cost. In current fuel price policy in Indonesia (especially fuel for transportation), the higher percent of biodiesel in blend will increase the price of blends fuel. The objective of this study is to assess the optimum blends of biodiesel with petroleum-based diesel fuel from the technically and economically consideration. The study result recommends that 20% biodiesel blend with 80% petroleum-based diesel fuel (B20) is the optimum blend for unmodifi ed diesel engine uses.Keywords: biodiesel, emission, optimum, blend

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