Influence of cerium oxide on the formation and oxidation of soot

Experimental investigation of catalytic soot oxidation and pressure drop characteristics in wall-flow diesel particulate filters

“…The overall results indicate that the presence of the catalyst in soot significantly lowers the activation energy of dry soot oxidation (Arrhenius plots at left side of the figure). This observation agrees with the results reported by Summers et al [97] and Lahaye et al [98] who found that the addition of Ce in the fuel is lowering the activation energy of soot oxidation from 170 to 120 kJ/mole. Ciambelli et al [99] also reported lower values of activation energy for soot oxidation after its impregnation with Cu/V/K catalyst.…”

“…Further interactions by the fuel additive effect on the combustion of the particulate are suspected. According to [98], increasing Cerium concentration in fuel diminishes the mean particle size of the soot during formation and lowers the ignition temperature under oxidation. The variation of particulate VOF content at the filter periphery due to the lower wall temperatures seems to have an observable effect on the calculated activation energies.…”

Effect of the presence of chlorine in bimetallic PtZn/CeO2 catalysts for the vapor-phase hydrogenation of crotonaldehyde

“…The CeO 2 support was prepared as follows: an aqueous solution of (NH 4 ) 2 gram of support). The amount of the platinum precursors was the appropriate to obtain a 2wt% Pt loading, whereas 1wt% was the nominal loading for Zn.…”

“…It is a very important constituent of three way catalysts (TWC), where it plays a major role as oxygen buffer [1]. Ceria plays also an important role in the removal of SO x from fluid catalytic cracking (FFC) flue gases and as oxidation catalyst for the removal of soot in the exhaust gases from Diesel engines [2].…”

Synthesis, Characterization of Ceria Modified ZSM-5 and Its Performance Towards NO Oxidation

“…For example, if we add cerium compound as fuel additive first they decrease the engine-out particulate [18]. The second effect of the cerium additive is that it enhances the reactivity of the soot formed [19][20][21]. If it combine with traces of precious metals such as platinum catalyst may showed synergetic effect in the oxidation of soot with NO and O 2 [22].…”