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Low temperature DPF regeneration by delafossite catalysts

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Low temperature DPF regeneration by delafossite catalysts

Authors

Samir Bensaid, N Russo

Publication date 2011/11/1 Journal Catalysis today Volume 176 Issue 1 Pages 417-423 Publisher Elsevier Description

Several Li–Cr delafossite catalysts (LiCrO2, LiCr0.9O2, LiCr0.8O2, LiCr0.7O2, Li0.9CrO2,

Li0.8CrO2 and Li0.7CrO2) were prepared via a highly exothermic and self-sustaining reaction,

the so-called “solution combustion synthesis (SCS)” method, and characterized by means of XRD, BET, FESEM-EDS, H2-temperature programmed reduction (TPR) and XPS analyses,

as catalysts for the combustion of soot, a major pollutant emitted by diesel engines. These catalysts already showed appreciable activity at 350 °C towards the catalytic combustion of soot even under loose contact conditions. The best prepared catalyst (LiCr0.9O2) could ignite

soot combustion well below 350 °C, which is inside the range of temperatures reached at the exhaust line of a diesel engine. The correlation between the activity order and the capability to provide surface adsorbed oxygen (O−) by the prepared delafossite catalysts, enabled by a …

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