Development of Fe2O3 based catalysts to control pollutant emissions in diesel engines

• Published in: Fuel (Guildford) 2017-11, Vol.208, p.111-116
• Main Authors: Resitoglu, Ibrahim Aslan, Altinisik, Kemal, Keskin, Ali, Yildirimcan, Saadet, Ocakoglu, Kasim, Omar, Muhammed Arslan
• Format: Article
• Language: English
• Subjects: Diesel engine; DOC; Emission control systems; Pollutant emissions; SCR
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2017.07.023

[Display omitted] •Development of hematite based TiO2 and Pt added catalysts for diesel engines.•The characterization of hematite based catalysts by FE-SEM, BET, XRD and XRF.•Significant conversion efficiencies in pollutant emissions with catalysts.•Slightly increase in BSFC due to use of catalysts. 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 rose up to 50°C after DOC. The use of catalysts in SCR system eliminated NOx emission by high rates. Furthermore; the use of catalysts in emission control systems led to an increase in specific fuel consumption and a decrease in excess air coefficient of engine.