The effects of Fe2O3 based DOC and SCR catalyst on the exhaust emissions of diesel engines
Resitoglu, Ibrahim Aslan
The effects of Fe2O3 based DOCs (Diesel Oxidation Catalyst) and SCR (Selective Catalytic Reduction) catalysts on the exhaust emissions of diesel engine were investigated in this experimental study. The investigated catalysts, Al2O3 - TiO2/CeO2/Fe2O3 (ATCF) and Al2O3- Nb2O5/CeO2/Fe2O3 (ANCF), were produced with impregnation method and aged for 6 h at 600 degrees C. FE-SEM (Field Emission Scanning Electron Microscopy), XRD (X-Ray Diffraction), XRF (X-Ray Fluorescence) and BET (Brunauer-Emmett-Teller) Surface Area analyzes were carried out to determine the specifications of catalysts. The catalytic performances of the DOCs were tested for the oxidation of CO, HC, PM, NO while SCR catalysts were tested for SCR of NOx using NH3. An individual exhaust system was built up and mounted to the engin...
Development of Fe2O3 based catalysts to control pollutant emissions in diesel engines
Resitoglu, Ibrahim Aslan | Yıldırımcan, Saadet
Exhaust after treatment systems have become a necessity to eliminate pollutant emissions as required by standard. Nowadays, DOC and SCR are widely used after treatment technologies in diesel vehicles. In this experimental study carried on DOC and SCR systems, two different catalysts as Al2O3-TiO2/Fe2O3 and Al2O3-Pt/Fe2O3 were produced with impregnation method. The catalysts were characterized by Field Emission-Scanning Electron Microscope (FE-SEM), X-ray diffraction (XRD), X-ray fluorescence (XRF) and Brauner-Emmett-Teller (BET). Each catalyst was tested as DOC and SCR in real working state to see the effect of catalyst on pollutant emissions in diesel engine. Results showed that the use catalysts as DOC led to significant decrease in CO, HC, NO and smoke emissions. The exhaust temperature...
The pollutant emissions from diesel-engine vehicles and exhaust aftertreatment systems
Resitoglu, Ibrahim Aslan
Diesel engines have high efficiency, durability, and reliability together with their low-operating cost. These important features make them the most preferred engines especially for heavy-duty vehicles. The interest in diesel engines has risen substantially day by day. In addition to the widespread use of these engines with many advantages, they play an important role in environmental pollution problems worldwide. Diesel engines are considered as one of the largest contributors to environmental pollution caused by exhaust emissions, and they are responsible for several health problems as well. Many policies have been imposed worldwide in recent years to reduce negative effects of diesel engine emissions on human health and environment. Many researches have been carried out on both diesel e...
DEVELOPMENT OF SEMI-SPHERICAL POROUS METAL MATRIX BURNER FOR COMBIES
Resitoglu, Ibrahim Aslan
In this study, a semi-spherical porous metal matrix burner was developed for boiler combies and other combustion systems. Unlike the conventional ceramic porous medium, metal matrix has been used as porous medium. Experimental investigations on performance of the burner have been carried out. Burner was tested at four different flow rates (0,048 kg/s, 0,075 kg/s, 0,105 kg's and 0,125 kg/s). Tests showed the temperature on the burner surface has reached up to 1174 K. Value of CO emission dropped under the limit values, and the value of 99,2% was obtained for the efficiency of combustion. As a result, because of excellent combustion, the emission values reduced, and the energy saving was obtained.