| The ethanol as a renewable fuel adapts to the stratagem of nationwide energy replacement and sustainable energy development, and furthermore, this fuel is favourable for the improvement of atmospheric environment. The effects of 10% (v/v) ethanol-gasoline blended fuel (E10) on exhaust emission characteristics and catalyst performances were investigated,and three-way catalyst supported over metallic honeycomb was prepared for ethanol-gasoline fueled engines. It is necessary data for ethanol-gasoline blended fuel to be applied further.Exhaust emission characteristics from two 4-stroke motorcycles were researched using CVS and GC-MS when using E10 fuel. Analysis results show that CO and HC emissions are reduced when the addition of ethanol into gasoline, whereas NOx emissions increase. No significant reduction of aromatics is observed and acetaldehyde emission increases when ethanol-gasoline blended fuel is used Used exhaust catalytic converter was studied by SEM, EPMA, XPS, TG-DTA and FTIR after a 10000 km test program when ethanol-gasoline employed. The majorities of carbonaceous species are deposited on the precious metal (PM) sites in the case of E10. Carbon deposit, which is in the form of (CH)xO, mainly results in activity decrease of catalyst when using E10.Preparation and characterization of dip-coatedγ-alumina based ceramic materials on FeCrAl foils were investigated by means of ultrasonic vibration, heat impact, BET, EPMA and TG/DTA and so on. It was found that oxidation layer on metal foil surface produced during pre-oxidation at 950℃for 10 h exhibits an excellent compatibility withγ-alumina based washcoat. Wastcoat of desired properties were obtained with slurries having pH in the range 2.5 ~ 4.5, particle size distribution with ninety percentage of particles (d90) less than 10.00μm, a solid content about 35 wt. % and Ce-Zr solid solution weight ratio toγ- Al2O3 with ranging from 10%~30%.The complex compounds of M0.1Ce0.9Ox and M0.1Ce0.6Zr0.3Ox (M=Mn, Fe, Co, Ni and Cu) prepared by sol-gel method were characterized by XRD, Raman, TPR, EPR and XPS. It was found that the portions of transition metals are inserted into the lattice of CeO2 and Ce-Zr solid solution. The reduction of transition metal oxides is improved by the interaction between Ce and transition metal. The heat stability of M0.1Ce0.6Zr0.3Ox is better than that of M0.1Ce0.9Ox. Activity test results show that the ethanol complete oxidation is easier over Mn0.1Ce0.9Ox than Mn0.1Ce0.6Zr0.3Ox. Dynamic oxygen storage/release results show that Ce-based oxides containing Cu, Mn, or Ni are characterized with better DOSC and DOSR. It is noted that M0.1Ce0.6Zr0.3Ox samples exhibit better DOSC and DOSR at 500℃, compard to M0.1Ce0.9Ox.The 0.5 wt. % Pd/M0.1Ce0.9Ox and Pd/M0.1Ce0.6Zr0.3Ox (M=Mn, Fe, Co, Ni and Cu) were prepared by dry impregnating M0.1Ce0.9Ox and M0.1Ce0.6Zr0.3Ox support with an aqueous solution of Pd(NO3)2·H2O. The catalytic activities of NO, C3H8 and CO conversion over Pd/M0.1Ce0.9Ox and Pd/M0.1Ce0.6Zr0.3Ox were carried out in a microreactor system using simulation of exhaust emissions. The experimental results show that the activity over Pd/Mn0.1Ce0.6Zr0.3Ox is highest, and Pd/Co0.1Ce0.9Ox,Pd/Co0.1Ce0.6Zr0.3Ox and Pd/Ni0.1Ce0.6Zr0.3Ox behave better activities of NO, C3H8 and CO conversion. The Pd/Mn0.1Ce0.6Zr0.3Ox supported metal monolith catalyst prepared is characterized with better performace in reducing HC, CO and NOx emissions.
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