Stability and Reactivity of a Polyoxymethylene Dimethyl Ether over Typical Catalysts for Diesel Emission Control

Abstract Polyoxymethylene dimethyl ethers (OME) produced from methanol are considered as potential substitutes of Diesel fuel. Emissions formaldehyde and other components have been observed, particularly under cold-start conditions in engine test-bench experiments with OME In this study, the reactivity 3 (CH O(CH 2 O) CH ) its decomposition products was studied temperature range 80–450 °C a model gas test bench over V O 5 /WO /TiO Cu-CHA SCR catalysts, platinum-coated ammonia slip catalyst (ASC) two diesel oxidation catalysts (DOC), based on platinum platinum-palladium. Already at 80 °C, largely hydrolyzed to all catalysts. At temperatures above 150 oxidized CO via formic acid intermediate. The ASC showed similar behavior but . Whereas quantitatively formaldehyde, it did not show activity range. data indicate that release significant amounts catalytic converter can be virtually ruled out cold start conditions, also low hydrolysis produces emissions.