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Old 31-01-2014, 10:21 PM   #47
pi3141
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A thought occurred, if you add a liquid to diesel fuel, that when compressed in the engine will form hydrogen, you could add hydrogen to the combustion process and get a better burn. So I did a search on Hydrogen Peroxide and diesel and found some interesting reading that belongs on this thread.

Quote:
International Journal of Engineering Sciences & Emerging Technologies, April 2012.ISSN: 2231 – 6604 Volume 2, Issue 1, pp: 24-28 ©IJESET

24

EFFECT OF INJECTING HYDROGEN PEROXIDE INTO DIESEL ENGINE

Nagaprasad K. S.
Senior Lecturer, Department of Mechanical Engineering. S. Institute of Technology, Bangalore, India.

D. Madhu
Professor & Head, Department of Mechanical EngineeringGovt. Engineering College, K.R.Pet, India.


ABSTRACT

An experiment was conducted with four stroke multi-cylinder, water cooled compression ignition engine operated with neat diesel and blends of hydrogen peroxide with diesel. Main focus of this research is to investigate the performance of diesel engine by injecting hydrogen peroxide as blends with diesel at 2%, 5%and 10% proportions. In the experiments, injection timing was also changed, which is an important parameter in the study. Results showed that, the efficiency of engine increased by injecting hydrogen peroxide at all fractions along with diesel and the exhaust gas temperature has found to be decreased reasonably. Also, efficiency of engine has increased by advancing the injection timing by five deg for both diesel and its blends with hydrogen peroxide. At injection timing of 15 0 BTDC, engine was unable to start when 2% and 5% of hydrogen peroxide with diesel is injected.


CONCLUSIONS

The brake thermal efficiency of the engine increased while exhaust gas temperature decreased with increase in concentration of hydrogen peroxide with diesel at all the loads due to additional oxygen molecule released by hydrogen peroxide has led to better combustion. The maximum efficiency of 15.48% was observed at fifty percent of full load when the engine used 5% of hydrogen peroxide with diesel for injection pressure of 150 bar, and injection timing of 10 0 BTDC while minimum value of EGT has found to be 180 0 C at same condition. The efficiency of engine has increased by advancing the injection timing from 10 0 BTDC to 15 0 BTDC for both diesel and its blends with hydrogen peroxide. The engine didn’t start when 2% and 5% of hydrogen peroxide with diesel is injected at injection timing of 15 0 BTDC.

Link - http://www.academia.edu/1999665/EFFE..._DIESEL_ENGINE
Quote:
Injection of Hydrogen Peroxide into the Combustion Chamber of Diesel Engine: Effects on the Exhaust Gas Behaviour

Paper #: 2004-01-2925

Published: 2004-10-25

DOI:10.4271/2004-01-2925

Citation:
Trapel, E., Ifeacho, P., and Roth, P., "Injection of Hydrogen Peroxide into the Combustion Chamber of Diesel Engine: Effects on the Exhaust Gas Behaviour," SAE Technical Paper 2004-01-2925, 2004, doi:10.4271/2004-01-2925.


Abstract:

The improvement of the exhaust gas contents of diesel engines with respect to particles and gaseous emissions is still a very important engineering topic. In this work two different direct injection methods into the combustion chamber of a diesel engine have been investigated and compared. The first system involves the separate injection of H2O2/water solutions using a second nozzle, while the other is the injection of H₂O₂/water/diesel emulsions by a single injection system. It is known that H₂O₂ forms OH radicals at higher temperatures, whose probability for the oxidation of diesel soot is much higher than that of molecular oxygen. The H₂O₂ injection into the combustion chamber and the exhaust pipe of diesel engines has proved to be an effective measure towards the reduction of diesel soot. A Differential Mobility Analyzer (DMA) is applied to detect the change in particle diameter as function of H2O2/water addition. The injected H₂O₂ concentration in relation to injected diesel fuel was varied from 1 to 10%, and the injection pressure was also varied between 200 and 500 bars. By constant injection pressure and injection timing, it was found that H₂O₂/water/diesel emulsion leads to a higher reduction of unburned hydrocarbons and particulates. Correspondingly, an increase in the NOx emission is observed in comparison to separate injection of H₂O₂/water solution. The highest reduction of diesel particles was observed at higher injection pressures, and during delay injection timing of H₂O₂/water.

Link - http://papers.sae.org/2004-01-2925/
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