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Proof supporting "Hydrogen On Demand"




Research in 1975 examined hydrogen enhanced gasoline in lean combustion. John Houseman and D.J Cerini of the Jet Propulsion Laboratory produced a report for the Society of Automotive Engineers titled "On-Board Hydrogen Generator for a Partial Hydrogen Injection Internal Combustion Engine", and F.W. Hoehn and M.W. Dowy, also of the Jet Propulsion Lab, prepared a report for the 9th Intersociety Energy Conversion Engineering Conference, titled "Feasibility Demonstration of a Road Vehicle Fueled with Hydrogen Enriched Gasoline.

  Download Hydrogen Injection Report



NASA conducted research using hydrogen as a supplemental fuel to gasoline on a 1969 production engine. Their research specifically demonstrated that the higher flame speed of hydrogen was responsible for being able to extend the efficient lean operating range of a gasoline engine. They successfully used a methanol steam reformer for in situ production of carbon monoxide and hydrogen.

Lean-mixture-ratio combustion in internal-combustion engines has the potential of producing low emissions and higher thermal efficiency for several reasons. First, excess oxygen in the charge further oxidizes unburned hydrocarbons and carbon monoxide. Second, excess oxygen lowers the peak combustion temperatures, which inhibits the formation of oxides of nitrogen. Third, the lower combustion temperatures in­crease the mixture specific heat ratio by decreasing the net dissociation losses. Fourth, as the specific heat ratio increases, the cycle thermal efficiency also increases, which gives the potential for better fuel economy.

  Download NASA HHO Report



Research done in 2002 shows that the "addition of hydrogen to natural gas increases the burn rate and extends the lean burn-limit". Also concluded was that "hydrogen addition lowers HC emissions", and with properly "retarded ignition timing" also reduces NOx emissions.
Further research in 2002 achieved results showing "a reduction of NOx and CO2 emissions", by modeling an on-board hydrogen reformer and "varying the efficiency". The research was specifically a "numerical investigation" done to "foresee performances, exhaust emissions, and fuel consumption of a small, multi valve, spark ignition engine fueled by hydrogen enriched gasoline". 

HHO Test Report





In 2003 Tsolakis at Alabama University of Birmingham showed that "partial replacement of the hydrocarbon fuel by hydrogen combined with EGR resulted in simultaneous reductions of smoke and nitrogen oxides emissions (NOx) without significant changes to engine efficiency".  Similar results have been presented by a team of scientists from Zhejiang University, China, which found that "a little amount of hydrogen supplemented to the gasoline-air mixture can extend the flammability of the mixture... improving the economy and emissions of engines".





Test results in 2004 show "that the H2 rich reformate gas was an excellent NOx reductant, and can out perform raw Diesel fuel as a reductant in a wide range of operating conditions". This is referring to Diesel fuel being used in excess, as a reductant, to cool the combustion reaction, which indeed has a mitigating effect on NOx production.

In 2004 research was conducted concluding that an "SI engine system fueled by gasoline and hydrogen rich reformate gas has been demonstrated" to achieve a "dramatic reduction of pollution emissions". This was achieved by "extending EGR operation" in addition to consuming "gasoline and hydrogen rich reformate". Emissions results show that "HC-emissions as well as NOx-emissions could be reduced to near zero". Overall a 3.5% reduction in CO2 emissions was achieved during the "FTP test cycle" The research also concluded that the exhaust after treatment system can be simplified, "resulting in cost reduction for the catalysts".





Application of Hydrogen Assisted Lean Operation to Natural Gas-Fueled Reciprocating Engines (HALO)

Two key challenges facing Natural Gas Engines used for cogeneration purposes are spark plug
life and high NOx emissions. Using Hydrogen Assisted Lean Operation (HALO), these two
keys issues are simultaneously addressed. HALO operation, as demonstrated in this project,
allows stable engine operation to be achieved at ultra-lean (relative air/fuel ratios of 2) conditions, which virtually eliminates NOx production. NOx values of 10 ppm (0.07 g/bhp-hr NO) for 8% (LHV H2/LHV CH4) supplementation at an exhaust O2 level of 10% were demonstrated, which is a 98% NOx emissions reduction compared to the leanest unsupplemented operating condition. Spark ignition energy reduction (which will increase ignition system life) was carried out at an oxygen level of 9 %, leading to a NOx emission level of 28 ppm (0.13 g/bhp-hr NO). The spark ignition energy reduction testing found that spark energy could be reduced 22% (from 151 mJ supplied to the coil) with 13% (LHV H2/LHV CH4) hydrogen supplementation, and even further reduced 27% with 17% hydrogen supplementation, with no reportable effect on NOx emissions for these conditions and with stable engine torque output. Another important result is that the combustion duration was shown to be only a function of hydrogen supplementation, not a function of ignition energy (until the ignitability
limit was reached). The next logical step leading from these promising results is to see how much the spark energy reduction translates into increase in spark plug life, which may be accomplished by durability testing.

  Download the HALO report




Department of Transportation Report

  Guidelines for use of hydrogen fuel in Commercial Vehicles



Sustainable Energy Centre, School of Advanced Manufacturing and Mechanical Engineering, University of South Australia, Mawson Lakes, SA 5095, Australia

Using hydrogen as an additive to enhance the conventional diesel engine performance has been investigated by several researchers and the outcomes are very promising. However, the problems associated with the production and storage of pure hydrogen currently limits the application of pure hydrogen in diesel engine operation. On-board hydrogen–oxygen generator, which produces H2/O2 mixture through electrolysis of water, has significant potential to overcome these problems. This paper focuses on evaluating the performance enhancement of a conventional diesel engine through the addition of H2/O2 mixture, generated through water electrolysis. The experimental works were carried out under constant speed with varying load and amount of H2/O2 mixture. Results show that by using 4.84%, 6.06%, and 6.12% total diesel equivalent of H2/O2 mixture the brake thermal efficiency increased from 32.0% to 34.6%, 32.9% to 35.8% and 34.7% to 36.3% at 19 kW, 22 kW and 28 kW, respectively. These resulted in 15.07%, 15.16% and 14.96% fuel savings. The emissions of HC, CO2 and CO decreased, whereas the NOx emission increased.

  Effect of H2/O2 addition in increasing the thermal efficiency of a diesel engine






DOE GO13028-0001 DESCRIPTION/ABSTRACT This report is a summary of the work performed by Teledyne Energy Systems to understand high pressure electrolysis mechanisms, investigate and address safety concerns related to high pressure electrolysis, develop methods to test components and systems of a high pressure electrolyzer, and produce design specifications for a low cost high pressure electrolysis system using lessons learned throughout the project. Included in this report are data on separator materials, electrode materials, structural cell design, and dissolved gas tests. Also included are the results of trade studies for active area, component design analysis, high pressure hydrogen/oxygen reactions, and control systems design. Several key pieces of a high pressure electrolysis system were investigated in this project and the results will be useful in further attempts at high pressure and/or low cost hydrogen generator projects. An important portion of the testing and research performed in this study are the safety issues that are present in a high pressure electrolyzer system and that they can not easily be simplified to a level where units can be manufactured at the cost goals specified, or operated by other than trained personnel in a well safeguarded environment. The two key objectives of the program were to develop a system to supply hydrogen at a rate of at least 10,000 scf/day at a pressure of 5000psi, and to meet cost goals of $600/ kW in production quantities of 10,000/year. On these two points TESI was not successful. The project was halted due to concerns over safety of high pressure gas electrolysis and the associated costs of a system which reduced the safety concerns.

  Download the Report.



2010, May

  Effects of hydroxy (HHO) gas addition on performance and exhaust emissions in compression ignition engines (diesel).

In this study, hydroxy gas was produced by the electrolysis process of different electrolytes with various electrode designs in a leak proof plexiglass reactor (hydrogen generator). Hydroxy gas was used as a supplementary fuel in a four cylinder, four stroke, compression ignition engine without any modifications and without need for storage tanks.



To date, Hydrogen fuel enhancement products have not been specifically addressed by the United States Environmental Protection Agency. No research devices or commercial products have reports available as per the "Motor Vehicle Aftermarket Retrofit Device Evaluation Program." Ask Your self : "Why do they not use hydrogen on demand technology?

  Search for Government Documents



Page Last Edited - 04/03/2022

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