Effect of Hydrogen Peroxide on Premixed Iso-Octane/Air Combustion

2003 ◽  
Author(s):  
Mwila C. Mulenga ◽  
David S.-K. Ting ◽  
Graham T. Reader ◽  
Ming Zheng
Keyword(s):  
Hydrogen Peroxide ◽  
Internal Combustion Engines ◽  
Initial Conditions ◽  
Burning Velocity ◽  
Flame Temperature ◽  
Premixed Flame ◽  
Emissions Reduction ◽  
Combustion Engines ◽  
Detailed Chemical Kinetics ◽  
Co Reduction

The effect of hydrogen peroxide (H2O2) on premixed isooctane/air combustion was numerically investigated using detailed chemical kinetics (Peters’ mechanism) via CHEMKIN. Two cases were examined: one-dimensional, planar, adiabatic, premixed flame, which is of fundamental importance to many combustion systems including internal combustion engines, and zero-dimension, adiabatic Homogeneous Charge Compression Ignition (HCCI). Initial conditions investigated were at 298 K and 1 atm for the premixed flame and 343 K and 1 atm for the HCCI. The effects of H2O2 addition on combustion characteristics including burning velocity, flame temperature, species concentration and ignition delay were deduced. Hydrogen peroxide was utilized as a possible means of emissions reduction. Specifically, the potential of CO reduction due to increased intermediate OH species was studied. The utilization of H2O2 as a means of controlling ignition timing was also explored.

scholarly journals Analysis of thermodynamic parameters in spark ignition VCR engine

2019 ◽  
Vol 294 ◽  
pp. 05001
Author(s):  
Patryk Urbański ◽  
Maciej Bajerlein ◽  
Jerzy Merkisz ◽  
Andrzej Ziółkowski ◽  
Dawid Gallas
Keyword(s):  
Thermodynamic Parameters ◽  
Motion Analysis ◽  
Internal Combustion Engines ◽  
Initial Conditions ◽  
Combustion Process ◽  
Internal Combustion ◽  
3D Models ◽  
Spark Ignition ◽  
Combustion Engines ◽  
Combustion Processes

3D models of Szymkowiak and conventional engines were created in the Solidworks program. During the motion analysis, the characteristics of the piston path were analyzed for the two considered engine units. The imported file with the generated piston routes was used in the AVL Fire program, which simulated combustion processes in the two engines with identical initial conditions. The configurations for two different compression ratios were taken into account. The basic thermodynamic parameters occurring during the combustion process in internal combustion engines were analyzed.

Analysis of Nitrogen Oxides Formation in CH4/Air Laminar Premixed Flame

2013 ◽  
Vol 750-752 ◽  
pp. 1734-1737
Author(s):  
Jun Xia Zhang ◽  
Bing Biao Yang
Keyword(s):  
Nitrogen Oxides ◽  
Turbulent Diffusion ◽  
Mass Fraction ◽  
Burning Velocity ◽  
Flame Temperature ◽  
Premixed Flame ◽  
Model Parameters ◽  
Turbulent Diffusion Flame ◽  
Chemical Reaction Kinetics ◽  
Combustion Processes

Many combustion processes seriously pollute the environment because of producing nitrogen oxides emission, which abstracts wide attention from researchers. How to reduce nitrogen oxides emission is important to protect the environment. At the present work, a reduction mechanism based on a detailed chemical reaction kinetics mechanism, Gri_Mech3.0 was adopted to analyze nitrogen oxides formation in a CH4/air laminar premixed and turbulent diffusion flames, a two dimensional turbulent diffusion flame was simulated with the EDC model. Parameters were obtained, including flame temperature, burning velocity and mass fraction of nitrogen oxides. The results of laminar premixed flame show that nitrogen oxides emission mainly comes from the thermal and prompt NO mechanisms. A large amount of free radicals O, H and OH produced by combustion processes provide reactants for the reactions of nitrogen oxides formation. Mole fraction of nitrogen oxides increases with the increasing of both flame temperature and chemical equivalence ratios. By contrast, there is a lower mass fraction of nitrogen oxides formation for the fuel-lean flame.

Laminar Flame Characteristics of 2,5-Dimethylfuran (DMF) Biofuel: A Comparative Review with Ethanol and Gasoline

2021 ◽  
Vol 11 (1) ◽  
pp. 237-254
Author(s):  
Long Vuong Hoang ◽  
Danh Chan Nguyen ◽  
Thanh Hai Truong ◽  
Huu Cuong Le ◽  
Minh Nhat Nguyen
Keyword(s):  
Environmental Pollution ◽  
Internal Combustion Engines ◽  
Laminar Flame ◽  
Initial Conditions ◽  
Internal Combustion ◽  
Alternative Fuel ◽  
Early Years ◽  
Combustion Engines ◽  
Comparative Review ◽  
Potential Alternative

Since the early years of the 21st century, the whole world has faced two very urgent problems: the depletion of fossil energy sources and climate change due to environmental pollution. Among the solutions sought, 2,5-Dimethylfuran (DMF) emerged as a promising solution. DMF is a 2nd generation biofuel capable of mass production from biomass. There have been many studies confirming that DMF is a potential alternative fuel for traditional fuels (gasoline and diesel) in internal combustion engines, contributing to solving the problem of energy security and environmental pollution. However, in order to apply DMF in practice, more comprehensive studies are needed. Not out of the above trend, this paper analyzes and discusses in detail the characteristics of DMF's combustible laminar flame and its instability under different initial conditions. The evaluation results show that the flame characteristics of DMF are similar to those of gasoline, although the burning rate of DMF is much higher than that of gasoline. This shows that DMF can become a potential alternative fuel in internal combustion engines.

A review on emissions reduction techniques used in internal combustion engines

2021 ◽  
Vol 20 (3/4) ◽  
pp. 232
Author(s):  
Digambar Singh ◽  
Dilip Sharma ◽  
S.L. Soni ◽  
Sumit Sharma ◽  
Pushpendra Kumar Sharma ◽  
...  
Keyword(s):  
Internal Combustion Engines ◽  
Internal Combustion ◽  
Emissions Reduction ◽  
Combustion Engines ◽  
Reduction Techniques

Hydrogen Peroxide Effect on HCCI Performance

2001 ◽  
Author(s):  
Cüneyt Uykur ◽  
Andrew L. Zuccato ◽  
Graham T. Reader ◽  
David S.-K. Ting
Keyword(s):  
Hydrogen Peroxide ◽  
Internal Combustion Engines ◽  
Kinetic Mechanism ◽  
Chemical Kinetic ◽  
Operating Conditions ◽  
Combustion Engines ◽  
Flexible Control ◽  
Hcci Combustion ◽  
Stirred Reactor ◽  
H2o2 Addition

Abstract Methane fueled Homogeneous Charged Compression Ignition (HCCI) combustion is investigated using detailed kinetic modeling. Control of heat release rate is identified as the biggest challenge against HCCI operation. A new control strategy, hydrogen peroxide (H2O2) addition, along with intake mixture preheating, is proposed to resolve this problem. A single-zone perfectly stirred reactor type formulation is employed with detailed chemical kinetic mechanism to predict homogeneous gas-phase chemical kinetics. The effects of H2O2 addition on the performance parameters of a methane-fueled HCCI engine are simulated. The results show that HCCI performance can be improved radically by the addition of H2O2 since it lowers the ignition delay time substantially. The resulting NOx concentration in high IMEP operating conditions is significantly less than that emitted from conventional internal combustion engines. Possibility of increasing NOx emissions with increasing initial temperature has been shown. Reduction in carbon monoxide emission is predicted with the addition of H2O2 via the increased hydroxyl chemistry. More flexible control of HCCI operation is possible by regulating the amount of H2O2 added.

scholarly journals Effect of Refrigeration Assisted Intercooler Turbocharging on Engine’s Horse Power

2021 ◽  
Vol 79 (2) ◽  
pp. 95-111
Author(s):  
Saba Arif ◽  
Adil Qadeer ◽  
Juntakan Taweekun ◽  
Zamri Noranai ◽  
Roman Kalvin
Keyword(s):  
Air Temperature ◽  
Internal Combustion Engines ◽  
Cooling System ◽  
Emissions Reduction ◽  
Air Cooling ◽  
Combustion Engines ◽  
Performance Gain ◽  
Transportation Sector ◽  
Air Cooling System ◽  
Horse Power

The stringent regulations on fuel saving and emissions reduction in the transportation sector have become game-raisers in the development of present internal combustion engines for road applications, even if under-the-hood space constraints, downsizing and down-weighting prevent from adopting radical changes in the engine layout. In current research, objective is to find a viable and pragmatic solution to reduce the turbo-charged engine intake air temperature by a large value as compared to traditional air-to-air intercoolers to increase Engine Horsepower. In undergoing research, a refrigerated intercooler is designed on the basis of refrigeration cycle, which further decreases the intake air temperature of the engine, resulting in increased horsepower, and improved Formula 1 lap times. Additionally, Formula 1, 2014 (V6 Turbo-Charged) Engine is used. According to the results, horse power of 1209.74HP is obtained by using refrigeration assisted intercooler. However, 1061HP is obtained for air to air intercooler. So, performance gain of 15 to 20% over present intake air cooling system in Formula 1 engine cars is successfully achieved. Additionally, Research will be utilized to decrease lap time in formula 1 racing cars.

scholarly journals Experimental Study of Premixed Gasoline Surrogates Burning Velocities in a Spherical Combustion Bomb at Engine Like Conditions

Energies ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 3430
Author(s):  
Miriam Reyes ◽  
Francisco V. Tinaut ◽  
Alexandra Camaño
Keyword(s):  
Equivalence Ratio ◽  
Internal Combustion Engines ◽  
Initial Conditions ◽  
Burning Velocity ◽  
Initial Pressure ◽  
Power Laws ◽  
Liquid Fuels ◽  
Diagnostic Model ◽  
Positive Dependence ◽  
Thermodynamic Variables

In this work are presented experimental values of the burning velocity of iso-octane/air, n-heptane/air and n-heptane/toluene/air mixtures, gasoline surrogates valid over a range of pressures and temperatures similar to those obtained in internal combustion engines. The present work is based on a method to determine the burning velocities of liquid fuels in a spherical constant volume combustion bomb, in which the initial conditions of pressure, temperature and fuel/air equivalence ratios can be accurately established. A two-zone thermodynamic diagnostic model was used to analyze the combustion pressure trace and calculate thermodynamic variables that cannot be directly measured: the burning velocity and mass burning rate. This experimental facility has been used and validated before for the determination of the burning velocity of gaseous fuels and it is validated in this work for liquid fuels. The values obtained for the burning velocity are expressed as power laws of the pressure, temperature and equivalence ratio. Iso-octane, n-heptane and mixtures of n-heptane/toluene have been used as surrogates, with toluene accounting for the aromatic part of the fuel. Initially, the method is validated for liquid fuels by determining the burning velocity of iso-octane and then comparing the results with those corresponding in the literature. Following, the burning velocity of n-heptane and a blend of 50% n-heptane and 50% toluene are determined. Results of the burning velocities of iso-octane have been obtained for pressures between 0.1 and 0.5 MPa and temperatures between 360 and 450 K, for n-heptane 0.1–1.2 MPa and 370–650 K, and for the mixture of 50% n-heptane/50% toluene 0.2–1.0 MPa and 360–700 K. The power law correlations obtained with the results for the three different fuels show a positive dependence with the initial temperature and the equivalence ratio, and an inverse dependence with the initial pressure. Finally, the comparison of the burning velocity results of iso-octane and n-heptane with those obtained in the literature show a good agreement, validating the method used. Analytical expressions of burning velocity as power laws of pressure and unburned temperature are presented for each fuel and equivalence ratio.

Sign in / Sign up

Export Citation Format

Share Document