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 effect of biodiesel on activity of diesel oxidation catalyst and selective catalytic reduction catalysts in diesel engine
The effect of biodiesel on activity of diesel oxidation catalyst and selective catalytic reduction catalysts
Resitoglu, Ibrahim Aslan
NOx emission is one of the most important pollutants and held responsible for damages on human health and environment worldwide. Undoubtedly, diesel engines, which are widely used in many fields, are the most important sources of NOx emissions. Currently, SCR technology is the most effective method used to eliminate NOx emissions from diesel engines. Thanks to SCR technology, NOx emissions can be eliminated at very high rates by using a reductant and a catalyst. The NOx conversion efficiency of SCR system can be significantly improved using a DOC before the SCR system. This study focused on the effect of biodiesel, which is the primary fuel that can be an alternative to diesel fuel, on DOC and SCR efficiency. In the study, besides the traditional SCR catalyst (V2O5-WO3/TiO2), Ag/Al2O3 cata...
Reduction of Pollutant Emissions in Diesel Engines Through Metal-Based Fuel Additives and Aftertreatment Emission Control Technologies
Metal-Based Fuel Additives and Aftertreatment Emission Control Technologies
Resitoglu, Ibrahim Aslan | Sugozu, Banu
Pollutant emissions such as carbon monoxide (CO), hydrocarbons (HCs), nitrogen oxides (NOx), and particulate matter (PM) from diesel engines have serious adverse effects on both human health and the environment. Advanced post-engine emission control systems, such as the diesel oxidation catalyst (DOC) and selective catalytic reduction (SCR), have proven effective in substantially reducing or minimizing emissions of CO, HC, and NOx. Additionally, the use of metal-based fuel additives in diesel fuel has been widely studied and applied in practice to improve engine performance and optimize emission outcomes. The interaction between metal-based fuel additives and the performance of DOC and SCR systems has become a key area of research focus. This study investigates the impact of metal-based fu...
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...