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Mobile and Non-mobile Catalysts for Diesel-Particulate Combustion : A Kinetic Study
Fino, Debora,Russo, Nunzio,Badini, Claudio,Saracco, Guido,Specchia, Vito 한국화학공학회 2003 Korean Journal of Chemical Engineering Vol.20 No.3
One of the potential ways to solve the problem of diesel particulate emission from both stationary and mobile sources is the use of traps carrying a suitable catalyst for promoting particulate combustion as soon as it is filtered. A Cu-K-V based catalyst, considered among the most promising in the literature, the KVO_3+C_sCl and the K_0.7Cu0.3VO_3+KCl catalysts were prepared and investigated. Their performance was compared to a reference V_2O_5 catalyst. The superior performance of the Cu-K-V catalyst is based on the grounds of both microreactor(temperature programmed combustion) and catalytic trap tests. Based on experimental data and modelling calculations, this paper elucidates how the mobility of catalyst components is the main reason for such an outcome performance and is a prerequisite to achieve an activity sufficient for trap self-regeneration.
Al2O3-ZrO2 nanocomposites produced by solution combustion synthesis followed by ultrasonic milling
Sara Biamino,Elisa Paola Ambrosio,Diego Manfredi,Paolo Fino,Claudio Badini 한양대학교 세라믹연구소 2011 Journal of Ceramic Processing Research Vol.12 No.2
Zirconia toughened alumina materials (ZTA) have been produced by solution combustion synthesis (SCS). SCS has proved to be a rather rapid and simple method to produce nano-structured ceramic oxides powders. Its main drawback is a limited sinterability of the powder due to aggregation of the nanometric grains into larger particles characterized by irregular shapes. It was found out that when coupling the preparation of ZTA nanocomposites by SCS with ultrasonic milling it is possible to improve the powder sinterability. The effect of ultrasonic irradiation on the powders was observed by BET and SEM analyses,and by its effect on the final density.