Forskning ved Københavns Universitet - Københavns Universitet


Atmospheric and combustion chemistry of dimethyl ether

Publikation: Bidrag til tidsskriftTidsskriftartikel

It has been demonstrated that dimethyl ether (DME) is an ideal diesel fuel alternative. DME, CH3OCH3, combines good fuel properties with low exhaust emissions and low combustion noise. Large scale production of this fuel can take place using a single step catalytic process converting CH4 to DME. The fate of DME in the atmosphere has previously been studied. The atmospheric degradation is initiated by the reaction with hydroxyl radicals, which is also a common feature of combustion processes. Spectrokinetic investigations and product analysis were used to demonstrate that the intermediate oxy radical, CH3OCH2O, exhibits a novel reaction pathway of hydrogen atom ejection. The application of tandem mass spectrometry to chemi-ions based on supersonic molecular beam sampling has recently been demonstrated. The highly reactive ionic intermediates are sampled directly from the flame and identified by collision activation mass spectrometry and ion-molecule reactions. The mass spectrum reflects the distribution of the intermediates in the flame. The atmospheric degradation of DME as well as the unique fuel properties of a oxygen containing compound will be discussed.

TidsskriftProceedings of the Air & Waste Management Association's Annual Meeting & Exhibition
StatusUdgivet - 1 dec. 1997
BegivenhedProceedings of the 1997 Air & Waste Management Association's 90th Annual Meeting & Exhibition - Toronto, Can
Varighed: 8 jun. 199713 jun. 1997


KonferenceProceedings of the 1997 Air & Waste Management Association's 90th Annual Meeting & Exhibition
ByToronto, Can

ID: 228191267