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Terahertz spectroscopy was used to quantitatively assess the degree of graphitic order of the hydrocarbonaceous deposits formed during the reaction of n-butane over the catalyst ZSM-5.
The soot and NOx coming from diesel emissions can be considered as a dangerous pollutant, and have been causing serious environmental and health problems. To meet the increasingly stringent legislation for soot emission, the catalytic technology was used to eliminate soot emission from diesel exhausts. The catalysts, the perovskite-type oxides impregnated over zeolite supports (HTS, HZSM-5, RPSA,...
The present work consisted in the study of Titania/Zeolite catalyzed ozonation for nitrobenzene removal. Catalytic activity of the supported TiO2 is strongly influenced by the heat treatment temperature. Titania/Zeolite calcined at 600??C showed the best activity. An approximate increase of 21% in removal rate was achieved for catalytic ozonation compared with single ozonation. Kinetic study of dissolved...
In this study ZSM-5-type zeolite was synthesized by sol-gel and Cu-(Ce)-ZSM-5 catalysts were prepared by ion-exchange. The prepared catalysts were characterized by XRD, TPD, ICP-AES, FTIR and tested in the removal of NO in the presence of oxygen. The results showed that oxygen had obviously negative impact on activity of catalysts due most Cu+ were oxided to Cu2+ with increasing of temperature. The...
This paper investigated the catalytic ozonation of aqueous nitrobenzene (NB) in the presence of nano-TiO2/zeolite. The removal efficiency of NB was increased from ozone alone at 12.57% to in the present of catalyst at 33.76%, significantly. The optimum calcination temperature of nano-TiO2/zeolite was found out at 600degC. Catalytic ozonation of nitrobenzene was first order reaction with respect to...
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