Interactions in Ammonia and Hydrogen Oxidation Examined in a Flow Reactor and a Shock Tube.

Ammonia (NH) is a promising fuel, because it is carbon-free and easier to store and transport than hydrogen (H). However, an ignition enhancer such as H might be needed for technical applications, because of the rather poor ignition properties of NH. The combustion of pure NH and H has been explored widely.

Influences of the molecular fuel structure on combustion reactions towards soot precursors in selected alkane and alkene flames.

In this study, we experimentally investigate the high-temperature oxidation kinetics of n-pentane, 1-pentene and 2-methyl-2-butene (2M2B) in a combustion environment using flame-sampling molecular beam mass spectrometry. The selected C5 fuels are prototypes for linear and branched, saturated and unsaturated fuel components, featuring different C-C and C-H bond structures. It is shown that the formation tendency of species, such as polycyclic aromatic hydrocarbons (PAHs), yielded through mass growth reactions increases drastically in the sequence n-pentane < 1-pentene < 2M2B.

Quantification of the Keto-Hydroperoxide (HOOCHOCHO) and Other Elusive Intermediates during Low-Temperature Oxidation of Dimethyl Ether.

This work provides new temperature-dependent mole fractions of elusive intermediates relevant to the low-temperature oxidation of dimethyl ether (DME). It extends the previous study of Moshammer et al. [ J.