C111 PAH and Fullerene Formation Mechanism from Combustion Process of Aromatic Hydrocarbon Fuel

2005 ◽  
Vol 2005 (0) ◽  
pp. 93-94
Author(s):  
Masahiko SHIBAHARA ◽  
Hiroshi TAKADA ◽  
Tsubasa SHIMIZU
Keyword(s):  
Aromatic Hydrocarbon ◽  
Formation Mechanism ◽  
Combustion Process ◽  
Hydrocarbon Fuel ◽  
Fullerene Formation

scholarly journals PAH and Fullerene Formation from Low Pressure Combustion of Aromatic Hydrocarbon Fuel

2005 ◽  
Vol 71 (702) ◽  
pp. 682-689 ◽  
Author(s):  
Hiroaki TAKEHARA ◽  
Shunichi YOSHIKAWA ◽  
Masahiko SHIBAHARA ◽  
Nilson KUNIOSHI ◽  
Masashi KATSUKI
Keyword(s):  
Aromatic Hydrocarbon ◽  
Hydrocarbon Fuel ◽  
Low Pressure ◽  
Fullerene Formation

The Effect of the Residence Time in the High Temperature Field on the Fullerene and PAH Formation Mechanism

2011 ◽  
Author(s):  
Tatsuya Saika ◽  
Youhei Sakita ◽  
Masahiko Shibahara
Keyword(s):  
High Temperature ◽  
Residence Time ◽  
Formation Mechanism ◽  
Flue Gas ◽  
Combustion Process ◽  
Hydrocarbon Fuel ◽  
Experimental Conditions ◽  
Reduced Pressure ◽  
Reaction Field ◽  
High Temperature Reaction

Fullerenes were generated and observed in the combustion processes of hydrocarbon fuel under reduced pressure conditions however the fullerene formation mechanism from PAHs in fuel rich hydrocarbon flames under reduced pressure conditions has not been clarified yet. In the present study, the effects of the residence time in the high temperature reaction field were investigated experimentally and the effects of the residence time on the contents of fullerenes and PAHs were discussed. The experimental results showed that the contents of fullerenes as well as PAHs in the total soot collected from the flue gas decreased with the increase of the residence time in the range from 800 to 1500 degree Celsius. On the other hand, the contents of fullerenes in the total soot decreased with the increase of the residence time over 1500 degree Celsius because the total PAHs contents in the flue gas increased under the present experimental conditions. It is essential for the fullerene generation to realize the optimal residence time from 800 to 1500 degree Celsius as well as that over 1500 degree Celsius with an appropriate PAH partial pressure in the combustion process.

SPECTRAL DIAGNOSTICS OF THE HYDROCARBON FUEL COMBUSTION PROCESS

2021 ◽  
pp. 12-17
Author(s):  
M. A. Vaganov
Keyword(s):  
Combustion Process ◽  
Hydrocarbon Fuel ◽  
Combustion Products ◽  
Combustible Mixture ◽  
Fuel Combustion ◽  
Propane Combustion ◽  
Gaseous Hydrocarbon ◽  
Spectral Bands ◽  
Air Supply ◽  
Spectral Diagnostics

It is proposed to use the methods of applied optical spectroscopy to solve the problem of control and diagnostics of gaseous hydrocarbon fuel combustion in this work. The results of an experimental study of spectroscopic informative parameters characterizing the propane combustion process are presented for three modes: combustion of pure propane without air supply, stoichiometric combustion and combustion with a change in the amount of supplied air relative to stoichiometric combustion. As a result of the experiment, it was found that the most intense bands in the emission spectrum of the flame arising from the combustion of propane correspond to the spectral bands of radicals of combustion products: OH, CH, and C2. While the intensities of various systems of bands in the flame spectrum depend significantly on the composition of the combustible mixture.

scholarly journals Hydrogen application in internal combustion engines

2020 ◽  
Vol 21 (1) ◽  
pp. 14-19
Author(s):  
Arthur R. Asoyan ◽  
Igor K. Danilov ◽  
Igor A. Asoyan ◽  
Georgy M. Polishchuk
Keyword(s):  
Burning Rate ◽  
Internal Combustion Engines ◽  
Combustion Process ◽  
Hydrocarbon Fuel ◽  
Internal Combustion ◽  
Technical Solution ◽  
Combustion Engines ◽  
Environmental Friendliness ◽  
Petroleum Origin ◽  
Order Of Magnitude

A technical solution has been proposed to reduce the consumption of basic hydrocarbon fuel, to improve the technical, economic and environmental performance of internal combustion engines by affecting the combustion process of the fuel-air mixture with a minimum effective mass fraction of hydrogen additive in the fuel-air mixture. The burning rate of hydrogen-air mixtures is an order of magnitude greater than the burning rate of similar mixtures based on gasoline or diesel fuel, compared with the former, they are favorably distinguished by their greater detonation stability. With minimal additions of hydrogen to the fuel-air charge, its combustion time is significantly reduced, since hydrogen, having previously mixed with a portion of the air entering the cylinder and burning itself, effectively ignites the mixture in its entirety. Issues related to the accumulation of hydrogen on board the car, its storage, explosion safety, etc., significantly inhibit the development of mass production of cars using hydrogen fuel. The described technical solution allows the generation of hydrogen on board the car and without accumulation to use it as an additive to the main fuel in internal combustion engines. The technical result is to reduce the consumption of hydrocarbon fuels (of petroleum origin) and increase the environmental friendliness of the car due to the reduction of the emission of harmful substances in exhaust gases.

Skeletal Kinetic Modeling for the Combustion of Endothermic Hydrocarbon Fuel in Hypersonic Vehicle

2021 ◽  
pp. 1-24
Author(s):  
Hui-Sheng Peng ◽  
Bei-Jing Zhong
Keyword(s):  
Surrogate Model ◽  
Laminar Flame ◽  
Combustion Process ◽  
Hydrocarbon Fuel ◽  
Kinetic Mechanism ◽  
Chemical Kinetic ◽  
Vital Role ◽  
Reacting Flow ◽  
Combustion Properties ◽  
Endothermic Hydrocarbon Fuel

Abstract Chemical kinetic mechanism plays a vital role in the deep learning of reacting flow in practical combustors, which can help obtain many details of the combustion process. In this paper, a surrogate model and a skeletal mechanism for an endothermic hydrocarbon fuel were developed for further investigations of the combustion performance in hypersonic vehicles: (1) The surrogate model consists of 81.3 mol% decalin and 18.7 mol% n-dodecane, which were determined by both the composition distributions and key properties of the target endothermic hydrocarbon fuel. (2) A skeletal kinetic mechanism only containing 56 species and 283 reactions was developed by the method of “core mechanism​ sub mechanism”. This mechanism can be conveniently applied to the simulation of practical combustors for its affordable scale. (3) Accuracies of the surrogate model and the mechanism were systematically validated by the various properties of the target fuel under pressures of 1-20atm, temperatures of 400-1250K, and equivalence ratios of 0.5-1.5. The overall errors for the ignition and combustion properties are no more than 0.4 and 0.1, respectively. (4) Laminar flame speeds of the target fuel and the surrogate model fuel were also measured for the validations. Results show that both the surrogate model and the mechanism can well predict the properties of the target fuel. The mechanism developed in this work is valuable to the further design and optimization of the propulsion systems.

Polycyclic aromatic hydrocarbon formation mechanism in the “particle phase”. A theoretical study

2010 ◽  
Vol 12 (32) ◽  
pp. 9429 ◽  
Author(s):  
Antonius Indarto ◽  
Anna Giordana ◽  
Giovanni Ghigo ◽  
Andrea Maranzana ◽  
Glauco Tonachini
Keyword(s):  
Polycyclic Aromatic Hydrocarbon ◽  
Aromatic Hydrocarbon ◽  
Formation Mechanism ◽  
Theoretical Study ◽  
Particle Phase ◽  
Polycyclic Aromatic ◽  
Hydrocarbon Formation

scholarly journals The gaseous hydrocarbon fuel combustion process diagnostics using laser-spark emission spectrometry

2021 ◽  
Vol 2094 (2) ◽  
pp. 022055
Author(s):  
M A Vaganov ◽  
V I Kazakov
Keyword(s):  
Spectral Characteristics ◽  
Combustion Process ◽  
Hydrocarbon Fuel ◽  
Fuel Combustion ◽  
Plasma Radiation ◽  
Emission Spectrometry ◽  
Gaseous Hydrocarbon ◽  
Study Results ◽  
Laser Spark ◽  
Combustion Processes

Abstract To solve the gaseous hydrocarbon fuel combustion process control and diagnostics problem, it is proposed to apply the laser-spark emission spectrometry methods. In propane-air mixture combustion, three modes are investigated: stoichiometric combustion, an enriched mixture, and a lean mixture. A laboratory stand has been developed to study combustion processes by laser-spark emission spectrometry. The plasma radiation spectral characteristics an experimental study results formed in a flame when exposed to laser radiation are presented.

scholarly journals Verification of three-dimensional mathematical modeling when calculating the combustion of hydrocarbon fuel in an experimental cylindrical furnace enriched with a plasma fuel system

2020 ◽  
Vol 4 (315) ◽  
pp. 96-105
Author(s):  
V. E. Messerle ◽  
◽  
S. A. Bolegenova ◽  
M. K. Bodykbayeva ◽  
A. A. Kuykabayeva ◽  
...  
Keyword(s):  
Coal Combustion ◽  
Thermal Power ◽  
Combustion Process ◽  
Three Dimensional ◽  
Thermal Characteristics ◽  
Hydrocarbon Fuel ◽  
Fuel System ◽  
Two Phase ◽  
Coal Particles ◽  
Kinetics Of

In this work, the operation of the boiler in traditional and plasma-activated conditions is investigated. To test the possibility of modeling the Cinar ICE program with an understanding of the physical mechanism of the processes of electrothermochemical fuel preparation (ETCF) and combustion, a study of coal combustion in an experimental furnace with a thermal power of 3 MW equipped with a plasma fuel system was carried out. To study the combustion process of an air mixture that had undergone preliminary plasma preparation for combustion, one-dimensional plasma-coal and three-dimensional computer programs Cinar ICE were used, which study in detail the mechanism of the kinetics of thermochemical exchange in a two-phase flow, where the plasma fuel source is located, and the exact geometry of the furnace, and the kinetics of the process сombustion of coal particles. As a result of calculations, the distribution of temperature, velocity of gas and particles in the process of ETCPT, the concentration of gas-phase mixtures, the concentration of carbon and the degree of gas contamination in the remainder of alloyed coal were determined. It was found that the plasma activation of combustion affects the thermal characteristics of the Torch, the mechanical non-combustible fuel residue and the concentration of nitrogen oxide at the outlet from the furnace. It has been proven that when simulating coal combustion, it is possible to achieve an effective description of the process using the Cinar ICE program.

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