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...
Using Pd(II) and Ni(II) complexes with N,N-dimethyl-N′-2-chlorobenzoylthiourea ligand as fuel additives in diesel engine
Resitoglu, Ibrahim Aslan | Avsar, Gokturk | Buldum, Barış
Fuel additives have been used to improve engine performance and also to reduce the pollutant emissions that occur after the combustion in engine. The effect of additions of bis-(N,N-dimethyl-N'-2-chloroben zoylthioureato) palladium (II), PdL2 and bis-(N, N-dimethyl-N'-2-chlorobenzoylthioureato) nickel (II), NiL2 complexes into diesel as metal additives was investigated experimentally. PdL2 and NiL2 complexes were added as 50 and 100 ppm to diesel and the properties (density, viscosity, calorific value, Cetane number, sulphur content, flash point, pour point and copper strip corrosion) of each test fuel were investigated. In general, the metal additives haven't led to major changes on fuel properties of diesel. However pour point values of additive blends reduced while flash ...
Esterification of oleic acid using CoFe2O4@MoS2 solid acid catalyst under microwave irradiation
Sönmez, Özgür | Gözmen, Belgin
Ensuring highly efficient biodiesel production requires catalysts. Therefore, developing heterogeneous catalysts capable of being recovered and reused without compromising effectiveness is crucial. In this context, the CoFe2O4@MoS2 heterogeneous magnetic acid catalyst was synthesized and characterized in detail by XRD, SEM-EDX, BET surface area, magnetic property and acid strength. Finally, the catalytic performance of this catalyst was evaluated for the esterification of oleic acid by microwave-assisted method. The fabricated CoFe2O4@MoS2 catalyst has a strong saturation magnetization of 15.78 emu/g, a surface area of 6.70 m2/g, and a high acid loading of 2.1 mmol H+/g, according to the characterization data. The highest oleic acid conversion of 98.2 % was achieved under the optimum condi...
Influence of the addition of various ionic liquids on coal extraction with NMP
Sönmez, Özgür | Gözmen, Belgin
In this work, two Turkish coals were extracted with N-methyl-2-pyrrolidone (NMP) and NMP containing a small amount of ionic liquids (ILs) under reflux conditions at atmospheric pressure. The effects of coal type, ionic liquid type, ionic liquid-to-coal ratio, and ultrasonic interactions on extraction yield were investigated. The ILs used were: 1-butyl-3-methylimidazolium chloride ([Bmim]Cl), 1-buty-4- methylpyridinium chloride ([Bmp]Cl), 1-ethyl-3-methylimidazolium chloride ([Emim]Cl), and 1-butyl-2,3-dimethylimidazolium chloride ([Bdmim]Cl). It was found that the extraction yield of coals using NMP/ILs varied with coal type, IL type and amount of IL. ILs were effective on the extraction of Afsin-Elbistan (AE) lignite, but not on the extraction of Üzülmez (UZ) coal. A significant in...