Study on the Exhaust Emission Characteristics in the Diesel Engine with the Urea-SCR System According Various Urea Contents Rate

2013 ◽  
Author(s):  
Hyung Jun Kim ◽  
Yunsung Lim ◽  
Myoung Do Eom
Keyword(s):  
Diesel Engine ◽  
Exhaust Emission ◽  
Emission Characteristics ◽  
Scr System

Diesel Fuel Multiple Injection Effects on Emission Characteristics of Diesel Engine Mixed Ammonia Gas Into Intake Air

2019 ◽  
Vol 141 (6) ◽  
Author(s):  
Yoichi Niki ◽  
Yoshifuru Nitta ◽  
Hidenori Sekiguchi ◽  
Koichi Hirata
Keyword(s):  
Diesel Engine ◽  
Diesel Fuel ◽  
Internal Combustion Engines ◽  
Experimental Results ◽  
Exhaust Emission ◽  
N2o Emissions ◽  
Emission Characteristics ◽  
Exhaust Gas ◽  
N2o Production ◽  
Combustion Processes

This study focuses NH3 as an alternative fuel for internal combustion engines, because NH3 is known as a H2 carrier and its combustion does not produce CO2 causing global warming. On the other hand, some reports show that unburned NH3 and N2O appear in exhaust gas, when NH3 is used as fuel for compression ignition or spark ignition engines. NH3 is toxic and N2O is one of the greenhouse gases. These emissions should not be emitted. These reports point out that exhaust gas after treatments and/or injection strategies can be effective to reduce these emissions. From our previous investigations, it was confirmed that NH3 and N2O were contained in the exhaust gas of a conventional diesel engine with NH3 gas mixed into the engine intake. In this study, NH3 combustion processes in the diesel engine were investigated from the experimental results. Based on the investigations, a pilot or postinjection was conducted to reduce emissions of NH3 and N2O. In this paper, first the experimental results of the combustion and exhaust emission characteristics on the conventional diesel engine with NH3 gas mixed into the engine intake are shown. NH3 and N2O emissions are then verified by analyzing the exhaust gas. Next, NH3 combustion processes in the diesel engine are considered from the experimental results to report on the effects of a pilot and postdiesel fuel injection on NH3 and N2O production processes. The experimental results suggest that the multiple diesel fuel injections would be one of the effective measures to reduce N2O and NH3 emissions on NH3 and diesel dual-fueled engine.

A study of combustion and exhaust emission characteristics for early fuel injection diesel engine

2004 ◽  
Vol 2004.I (0) ◽  
pp. 151-152
Author(s):  
Yukihiro AIMOTO ◽  
Shinji NAJIMA ◽  
Osamu MORIUE ◽  
Masato MIKAMI ◽  
Naoya KOJIMA
Keyword(s):  
Diesel Engine ◽  
Fuel Injection ◽  
Exhaust Emission ◽  
Emission Characteristics

Effects of Ammonia Gas Mixed Into Intake Air on Combustion and Emissions Characteristics in Diesel Engine

2016 ◽  
Author(s):  
Yoichi Niki ◽  
Dong-Hoon Yoo ◽  
Koichi Hirata ◽  
Hidenori Sekiguchi
Keyword(s):  
Diesel Engine ◽  
Catalytic Reduction ◽  
Gas Injection ◽  
Experimental Results ◽  
Injection System ◽  
Emission Characteristics ◽  
Diesel Injection ◽  
Injection Quantity ◽  
Carbon Dioxide Co2 ◽  
Scr System

This paper reports on the experimental results of the combustion and emission characteristics of a conventional diesel engine mixed ammonia (NH3) gas into the intake air, and discusses its usability. In the experiments, NH3 gas was injected into the intake pipe of the diesel engine by a gas injector. The diesel engine has a natural aspiration single cylinder with 7.7 kW rated power at 1500 rpm and a diesel injection system to inject diesel fuel into the cylinder. As experimental results on the combustion characteristics, it was confirmed that the compression and maximum pressures in the cylinder decreased and the ignition timing delayed with increasing the NH3 gas injection quantity. On the emission characteristics in the exhaust gas, NH3, water (H2O) and nitrous oxide (N2O) increased and carbon dioxide (CO2) decreased proportionally to the NH3 gas injection quantity. In contract, the nitrogen oxide (NO) was nearly the same. Moreover, it was confirmed that NH3 can be reduced by reacting with NO in a selective catalytic reduction (SCR) system.

Effect of Hydrogen Fraction in Intake Mixture on Combustion and Exhaust Emission Characteristics of a Diesel Engine

2009 ◽  
Author(s):  
Toru Miyamoto ◽  
Masato Mikami ◽  
Naoya Kojima ◽  
Hajime Kabashima ◽  
Yasuhiro Urata
Keyword(s):  
Diesel Engine ◽  
Exhaust Emission ◽  
Emission Characteristics

scholarly journals Influence of Palm Biofuel for Marine Diesel Engine on Combustion and Exhaust Emission Characteristics

2018 ◽  
Vol 53 (3) ◽  
pp. 441-446 ◽  
Author(s):  
Sumito Nishio ◽  
Tetsugo Fukuda ◽  
Aguk Zuhdi Muhammad Fathallah ◽  
Hari Setiapraja
Keyword(s):  
Diesel Engine ◽  
Exhaust Emission ◽  
Emission Characteristics ◽  
Marine Diesel Engine ◽  
Marine Diesel
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