Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Combustion

Effect of Aluminum Oxide Nanoparticles Fuel Additives on the Performance and Emissions of Diesel Engine

H.A. Dhahad; A.S. Hamadi; S.A. Ali

Engineering and Technology Journal, 2017, Volume 35, Issue 9, Pages 956-960

The effect of Aluminum Oxide (AL2O3) nanoparticles fuel additives on the performance and emission characteristics of diesel engine was investigates. Diesel fuel was mixed with the (AL2O3) nanoparticles in the mass fractions of 100 and 150 ppm by using ultrasonicator. Direct injection (DI), by using fiat diesel engine that run at fixed speed (1500 rpm) and constant fuel injection pressure (400 bar) with varying the operation load. The gain result was likening with those obtain when the operation the diesel engine with normal fuel. Measurements indicated that there is enhancement in the thermal efficiency and the brake specific fuel consumption with increasing the dosing level of (AL2O3) nanoparticles in the blended fuel. The emission results at all loads showed that NOx and smoke produced by (AL2O3) blended fuels were less than those produced by diesel fuel. Diesel fuel produced CO and HC more than (AL2O3) blended fuels at high load and less at low load.

The Effect of pH on Partial Size of Ferrimagnetic Powders Prepared by Auto Combustion Method

Ghead K. Salman; Saja M. Jabaar

Engineering and Technology Journal, 2016, Volume 34, Issue 2, Pages 269-277

During the preparation of this research ferrites - copper powder chemical auto-combustion method ,has been studying the effect of changing of (pH=3, 5, 7, 9, 11) coefficient on the particle size of the powder, used Debye-ScherrerFormula, to calculate the particle size by use of the highest peak (311) in X-ray diffraction (XRD) were obtained particle size ranges (11.5-13.75) nm, and also has been compared to the values obtained in drawing curves that represent change the latticeconstant, particle size and density as a function of the (pH), and used Infrared spectroscopy (FTIR) to determine the internal structure of models, and also has been studying the microscopic structure took photos by electron scan microscopy (SEM) where indicated formation of high porosity homogeneous this change in the acidity coefficient(pH)led to change particle size and therefore a change in the properties of structural and physical .

Modeling of Pollutants Prediction from Fuel Burning in Oil and Gas Refineries

Qais A. Rishack; Salih E.Najim; Rafid M. Hannun; Nick Syred

Engineering and Technology Journal, 2013, Volume 31, Issue 18, Pages 69-87

Oxides of nitrogen (NO + NO2 , (NOx)) are emitted from refineries, not only contribute to the production of photochemical smog at ground level but also cause damage to plant life and add to the problem of acid rain. The small amounts of prompt NO produced in the furnace chambers and oil refineries because the formation of NOx can be attributed to four distinct chemical kinetic processes: thermal NOx formation, prompt NOx formation, fuel NOx formation, and intermediate N2O.
In this paper, the portions of pollutants that resulted in fuel burning (liquid or gas) in oil and gas refinery were studied by modeling of emitted gases in furnace chamber. The case study at Nassiriya power plant with different loads (70 – 210) MW was studied. The method of finite volume was studied to predict the pollutant portions by using FLUENT computer code (FLUENT is one of largest codes of computer programs which solve thousands of flow and combustion cases. The case study was drawn graphically then imported to solve by FLUENT). These types of pollution species are NOx and SOx as the important air pollutant influenced the human health. The numerical analysis in calculating the pollutants of chamber gave the findings of crude oil emission in combustion is higher than that at using gaseous fuel.
So, the methods of decreasing NOx and SOx pollution by water injection and exhaust gas recirculation are used in refinery operation were presented