Journal ArticleDOI
Comparison of Emissions and Efficiency of a Turbocharged Lean-Burn Natural Gas and Hythane-Fueled Engine
J. F. Larsen,James S. Wallace +1 more
TLDR
In this paper, an experiment was conducted to evaluate the potential for reduced exhaust emissions and improved efficiency, by way of lean-burn engine fueling with hydrogen supplemented natural gas (Hythane).Abstract:
An experiment was conducted to evaluate the potential for reduced exhaust emissions and improved efficiency, by way of lean-burn engine fueling with hydrogen supplemented natural gas (Hythane). The emissions and efficiency of the Hythane fuel (15% hydrogen, 85% natural gas by volume), were compared to the emissions and efficiency of pure natural gas using a turbocharged, spark ignition, 3.1 L, V-6 engine. The feasibility of heavy duty engine fueling with Hythane was assessed through testing conducted at engine speed and load combinations typical of heavy-duty engine operation. Comparison of the efficiency and emissions at MBT spark timing revealed that Hythane fueling of the test engine resulted in consistently lower brake specific energy consumption and emissions of total hydrocarbons (THC), carbon monoxide (CO), and carbon dioxide (CO{sub 2}), at a given equivalence ratio. There was no clear trend with respect to MBT oxides of nitrogen (NO{sub x}) emissions. It was also discovered that an improved NO{sub x}-THC tradeoff resulted when Hythane was used to fuel the test engine. Consequently, Hythane engine operating parameters can be adjusted to achieve a concurrent reduction in NO{sub x} and THC emissions relative to natural gas fueling.read more
Citations
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Journal ArticleDOI
Internal combustion engines fueled by natural gas—hydrogen mixtures
TL;DR: In this article, a survey of research papers on utilization of natural gas-hydrogen mixtures in internal combustion engines is carried out, in which a mixture of low hydrogen percentage is suitable for using.
Journal ArticleDOI
Experimental study on thermal efficiency and emission characteristics of a lean burn hydrogen enriched natural gas engine
TL;DR: In this paper, the effect of hydrogen addition on a natural gas engine's thermal efficiency and emission was analyzed using variable composition hydrogen/CNG mixtures (HCNG), and the results showed that hydrogen enrichment could significantly extend the lean operation limit, improve the engine's lean burn ability, and decrease burn duration.
Journal ArticleDOI
Combustion of hydrogen-enriched methane in a lean premixed swirl-stabilized burner
TL;DR: In this paper, a premixed, swirl-stabilized flame was studied to determine the effects of enriching methane with hydrogen under fuel-lean conditions, and the results showed that the addition of a moderate amount of hydrogen to the methane/air mixture increased the peak OH concentration.
Journal ArticleDOI
Hydrogen enrichment for improved lean flame stability
TL;DR: In this paper, the authors studied the stability characteristics of a premixed, swirl-stabilized flame and determined the effects of hydrogen addition on flame stability under fuel-lean conditions.
Journal ArticleDOI
Experimental study on combustion characteristics of a spark-ignition engine fueled with natural gas–hydrogen blends combining with EGR
TL;DR: An experimental study on the effect of hydrogen fraction and EGR rate on the combustion characteristics of a spark-ignition engine fueled with natural gas-hydrogen blends was investigated in this article.
References
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Book
Internal combustion engine fundamentals
TL;DR: In this article, the authors describe real engine flow and combustion processes, as well as engine operating characteristics and their operation, including engine design and operating parameters, engine characteristics, and operating characteristics.
Journal ArticleDOI
Laminar burning velocities in stoichiometric hydrogen and hydrogenhydrocarbon gas mixtures
B.E. Milton,James C. Keck +1 more
TL;DR: In this article, the laminar burning velocities of hydrogen, acetylene, propane, and methane have been measured using a spherical combustion bomb, and the results were in good agreement with previous experimental results from combustion bombs and in reasonable agreement with theoretical calculations by Warnatz.
Journal ArticleDOI
Kinetics of engine-generated nitrogen oxides and carbon monoxide
TL;DR: In this article, a theoretical analysis of the chemical kinetics of the internal combustion engine expansion process has been undertaken as the objective of the present work, and 14 coupled non-linear differential equations based on thirty-two elementary chemical reactions were integrated numerically through use of a Runge-Kutta procedure.
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