Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Emissions


Humidification Effect on the Performance and Emissions of (DI) Diesel Engine Running on Diesel Fuel with Biodiesel Blended Nano Additives

Hussein Jumaa; Mahmoud A. Mashkour

Engineering and Technology Journal, 2021, Volume 39, Issue 5A, Pages 790-803
DOI: 10.30684/etj.v39i5A.1935

The effect of humidification of the air on the performance of a compression ignition engine operating on diesel, biodiesel with nano additives was investigated. The experiment was carried out on a single-cylinder, four-stroke, naturally aspirated water-cooled, direct injection Ricardo (E6/US) diesel engine at a constant speed of 1800 rpm, and varying loads. A mixture of Biodiesel (waste cooking oil) and diesel fuel by four ratios (B5, B10, B15, and B20) was used in the experiment. Besides, five concentrations of Iron oxide nanoparticles (Fe2O3, with particle size 20 nm) as fuel-additives were prepared (10 ppm, 30 ppm, 50 ppm, 70 ppm, and 100 ppm), and added to the test fuels (Bio-Diesel).  Taguchi Method by DOE was used for the optimization in this investigation. The results of Taguchi Method experiments identified the biodiesel (B20), nano additive (100 ppm), relative humidity (65%). The experimental results manifested that BTE improved by 17.62% and BSFC decreased by 12.72%, while NOx and PM reduced by 8.45%, 24.17%, respectively.

Analytical Study of Affecting Gasoline Quality Properties on Environment and Its Conformity with Specifications

Dhuha K. Ismayyir; Lamyaa M. Dawood

Engineering and Technology Journal, 2021, Volume 39, Issue 2A, Pages 306-315
DOI: 10.30684/etj.v39i2A.1745

Gasoline is an important fuel in human life, but it is also responsible for deteriorating Ambient Air Quality (AAQ) through fugitive and exhaust emissions. In this study, chemical properties (Sulfur and Lead content) of gasoline production at Al-Daura refinery were verify based on a statistical quality control tool. Gasoline samples were examined in January/2011 and compared with samples examined in January/2019. In this study, it was concluded that the average production process and process variability for Sulfur content and added Lead value are stable. In January/2011 Sulfur content conforms to Iraqi and European standard specifications, but Lead value doesn’t conform to Iraqi standards, where internationally the use of lead to enhance engine performance has been banned since the 1970s of a century ago because it’s large dangerous on the environment. In January/2019 Sulfur content conforms to Iraqi standards but doesn’t conform to European standards specifications. The addition of lead to gasoline is stopped in 2016; imported gasoline was used by blend it with produced gasoline at al Daura refinery to raise its quality. Gasoline quality properties must be improved and tighten up according to international standards to save our environment.

Air Pollutants and Performance Characteristics of Ethanol-Diesel Blends in CI Engines

Miqdam Tariq Chaichan

Engineering and Technology Journal, 2010, Volume 28, Issue 21, Pages 6365-6383

Owing to the energy crisis and pollution problems of today,
investigations have concentrated on decreasing fuel consumption and on
lowering the concentration of toxic components in combustion products by
using non-petroleum, renewable, sustainable and non-polluting fuels. While conventional energy sources such as natural gas, oil and coal are nonrenewable, alcohol can be coupled to renewable and sustainable energy
sources. In this study, the combustion characteristics and emissions of diesel fuel and ethanol blends were compared. The tests were performed at steady state conditions in a four-cylinder DI diesel engine at full load at 1500-rpm engine speed. The experimental results showed that diesel ethanol blends provided significant reductions in CO, unburned HC, and NOx. Ethanol blends had a 13.8% increase in brake-specific fuel consumption due to its lower heating value. The results indicated that ethanol may be blended with diesel fuel to be used without any modification on the engine