scholarly journals Study of Relationship between Combustion Characteristics and Carbon Bond Structures in Marine Heavy Fuel Oil

2005 ◽  
Vol 40 (4) ◽  
pp. 548-555
Author(s):  
Takaaki Hashimoto ◽  
Hiromi Shiihara
Keyword(s):  
Combustion Characteristics ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Carbon Bond

Effect of Chemical Fuel Additives on Liquid Fuel Saving, and Emissions for Heavy Fuel Oil

2016 ◽  
Author(s):  
Ahmed Emara
Keyword(s):  
Mass Flow ◽  
Acoustic Noise ◽  
Combustion Process ◽  
Combustion Characteristics ◽  
Fuel Oil ◽  
Mass Spectrometry Analysis ◽  
Fuel Additive ◽  
Fuel Saving ◽  
Fuel Additives ◽  
Heavy Fuel Oil

As fossil fuel resources are considered non-renewable sources of fuel, they will be totally consumed in the near or far future. Due to the intensive and extensive consumption of these fossil fuels in all life sectors such as transportation, power generation, industrial processes, and residential consumption, it is important to find other new methods to cover this fuel demand. Fuel additives are chemicals used to enhance fuel combustion performance, save fuel amounts required for combustion, and correct deficiencies in power and efficiency during consumption. The fuel additives are blended with the traditional fuel even by parts per million range for controlling chemical contaminants and emission reduction. In the present work, the experimental measurements were done, to evaluate the effect of fuel additive blending with the raw heavy fuel oil (Mazut) on fuel saving which is of a great significance, emissions control, and combustion characteristics as well as the combustion efficiency. These measurements are as follows: initial temperature of Mazut, exhaust gas temperature at the end of combustor, air and fuel mass flow rates to determine the heat load, inlet and outlet temperatures of cooling water, mass flow rate of water, concentration of different exhaust gases, acoustic (noise level) measurements, smoke number, and flame length. These measurements are performed using swirled vanes, co-axial, and double heavy fuel nozzle (1.5 gal/hr for each one) burner with maximum heating load of 550 kW. GC-MS (Gas chromatography-mass spectrometry) analysis was performed by using Hewlett Packard model 5890 equipped with a flame ionization detector (FID) to identify the fuel additives substances within the tested samples. The results reveal that the use of fuel additives improves the combustion characteristics and play an important role in fuel saving as well as emission and combustion process.

Study on the Relationship Between Combustion Characteristics and Properties of Marine Heavy Fuel Oil

2003 ◽  
Author(s):  
Takaaki Hashimoto ◽  
Senichi Sasaki
Keyword(s):  
Ignition Delay ◽  
Average Molecular Weight ◽  
Poor Quality ◽  
Combustion Characteristics ◽  
Carbon Residue ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Marine Fuel ◽  
Fuel Oils ◽  
Flame Retardation

The combustion characteristics (ignition delay and combustion period in this paper) of marine heavy fuel oil are affected by many factors such as density, carbon residue, asphaltene, aromaticity and carbon/hydrogen (C/H) ratio. When investigating the causes of operational problems in diesel engines, what properties should we check to find whether the main causes of the problems are related to fuel oil or not? What is the threshold of ignition delay and combustion period of fuel oil? The authors studied these topics using a combustion test apparatus called FIA 100, and arrived at the following conclusions: 1. The aromaticity index (CCAI) and the C/H ratio have good correlation with the combustion characteristics of marine fuel oil. These factors cannot be ignored during troubleshooting. 2. The carbon residue and asphaltene in fuel oil have no correlation with ignition delay, but have some correlation with the combustion period. 3. There is practically no correlation between the average molecular weight of fuel oil, and both ignition delay and combustion period. 4. Tentative threshold values of ignition delay and combustion period can be set for fuel oils of poor quality (flame retardation).

scholarly journals Evaluation of Combustion Characteristics of Heavy Fuel Oil by Single Droplet Combustion

1998 ◽  
Vol 33 (6) ◽  
pp. 441-447
Author(s):  
Kazuyuki Maeda ◽  
Shin-ichi Morishita ◽  
Koji Takasaki ◽  
Tomoaki Kirihata
Keyword(s):  
Combustion Characteristics ◽  
Fuel Oil ◽  
Droplet Combustion ◽  
Single Droplet ◽  
Heavy Fuel Oil

Study of the combustion characteristics of sewage sludge pyrolysis oil, heavy fuel oil, and their blends

Energy ◽  
2020 ◽  
Vol 201 ◽  
pp. 117559 ◽  
Author(s):  
Yong-Hao Kuan ◽  
Fang-Hsien Wu ◽  
Guan-Bang Chen ◽  
Hsien-Tsung Lin ◽  
Ta-Hui Lin
Keyword(s):  
Sewage Sludge ◽  
Combustion Characteristics ◽  
Fuel Oil ◽  
Pyrolysis Oil ◽  
Heavy Fuel Oil

Numerical Simulation of Heavy Fuel Oil Combustion Characteristics and NOx Emissions in Calciner in Cement Industry

2015 ◽  
Author(s):  
Hisham Abou ElSoad ◽  
Essam E. Khalil
Keyword(s):  
Mixture Fraction ◽  
Radiation Heat Transfer ◽  
Combustion Characteristics ◽  
Cement Industry ◽  
Fuel Oil ◽  
Combustion Model ◽  
Injection Velocity ◽  
Nox Emissions ◽  
Heavy Fuel Oil ◽  
Probability Density Function Pdf

The aim of the present study is to numerically investigate the combustion characteristics of Heavy Fuel Oil (HFO) and NOx emissions inside a Calciner used in cement industry. The combustion model was based on the conserved scalar (mixture fraction) and prescribed Probability Density Function (PDF) approach. The (RNG) k-ε turbulence model has been used. The HFO droplet trajectories were predicted by solving the momentum equations for the droplets using Lagrangian treatment. The radiation heat transfer equation was solved using P1 method. A swirl number greater than 0.6 was found to be optimal for good combustion characteristics and NOx emissions concentration. Meanwhile, it was found that the HFO viscosity value assumption has a significant effect on the injection velocity and must be considered as a function of temperature during the analysis as this will significantly affect the combustion characteristics.

Numerical Simulation of Heavy Fuel Oil Combustion Characteristics and NOx Emissions in Calciner in Cement Industry

2015 ◽  
Author(s):  
Hisham Aboelsaod ◽  
Essam E. Khalil
Keyword(s):  
Molecular Nitrogen ◽  
Combustion Characteristics ◽  
Cement Industry ◽  
Operating Conditions ◽  
Fuel Oil ◽  
Combustion Model ◽  
Injection Velocity ◽  
Nox Emissions ◽  
Heavy Fuel Oil ◽  
Swirl Number

The aim of the present study is to numerically investigate the combustion characteristics of Heavy Fuel Oil (HFO) and NOx emissions inside a calciner used in cement industry. The calciner is a furnace placed before the rotary Kiln its main objectives are the reduction of CO2 emissions and air pollutions while enhancing the cement quality through separating the calcination and clinkering processes. In order to conduct the present investigations the calciner at CEMEX Egypt Cement Company was considered and real dimensions and operating conditions were applied. The combustion model was based on the conserved scalar (mixture fraction) and prescribed Probability Density Function (PDF) approach. The (RNG) k-ε turbulence model has been used. The HFO droplet trajectories were predicted by solving the momentum equations for the droplets using Lagrangian treatment. The radiation heat transfer equation was solved using P1 method. The formation of thermal NOx from molecular nitrogen was modeled according to the extended Zeldovich mechanism. The effects of varying the burner’s swirl number and viscosity grade on the combustion performance of HFO and the resulting NOx emissions were considered. The burner’s swirl number influences the mixing rate of air and fuel. A small swirl number ≤ 0.6 is not desired as it elongates the flame; increases flue gases temperatures and increases the NOx emissions inside the calciner. A swirl number ≥ 0.6 is found optimal for good combustion characteristics and NOx emissions concentration. Meanwhile, it was found that the HFO viscosity has a significant effect on the injection velocity and must be considered as a function of temperature during the analysis as this will significantly affects the combustion characteristics.

Comparisons of combustion characteristics between bioliquid and heavy fuel oil combustion in a 0.7 MWth pilot furnace and a 75 MWe utility boiler

Energy ◽  
2020 ◽  
Vol 192 ◽  
pp. 116557 ◽  
Author(s):  
Ho Young Park ◽  
Karam Han ◽  
Hyun Hee Kim ◽  
Sangbin Park ◽  
Jihoon Jang ◽  
...  
Keyword(s):  
Combustion Characteristics ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Utility Boiler

A Comparative Study on the Combustion Characteristics of Burning Droplets of Marine Fuel Oils

1994 ◽  
Vol 38 (04) ◽  
pp. 349-353
Author(s):  
Cherng-Yuan Lin ◽  
Tze-Chin Pan ◽  
Che-Shiung Cheng
Keyword(s):  
Droplet Size ◽  
Power Plants ◽  
Flame Length ◽  
Heating Time ◽  
Combustion Characteristics ◽  
Fuel Oil ◽  
Heavy Fuel Oil ◽  
Marine Fuel ◽  
Fuel Oils ◽  
Marine Diesel

An experimental study conducted on a single oil droplet suspended on a quartz filament is carried out to investigate the effects of droplet size and heating time on the combustion characteristics of marine fuel oils. Fuel oils A and C, which approximate ASTM Nos. 2 and 6 fuel oils, respectively, are considered in this study primarily due to their frequent applications in marine power plants. The properties of these fuels are widely different; marine diesel fuel oil A is a distillate oil of miscible multi-components while heavy fuel oil C is known as a residual oil containing considerable amounts of immiscible matter. The combustion phenomena are observed by cinematography. The results show that the influences of droplet size and heating time on the combustion characteristics of flame length, flame appearance, soot, ignition delay, and overall burning rate vary for these two fuel oils to a significant extent. The reasons for these variations are discussed.

Biosorption of heavy fuel oil from aqueous solution by Eichhornia crassipes (Mart.) Solms in natura

2021 ◽  
Author(s):  
Laís A. Nascimento ◽  
Marilda N. Carvalho ◽  
Mohand Benachour ◽  
Valdemir A. Santos ◽  
Leonie A. Sarubbo ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Eichhornia Crassipes ◽  
Fuel Oil ◽  
Heavy Fuel Oil
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