Flame structure and pollutant formation in premixed and non-premixed flames 1
This activity encompasses understanding the elementary physical and chemical processes that are responsible for the structure of premixed and non-premixed flames and the relationship between flame structure, propagation and pollutant formation. Towards this end, we develop and use laser-diagnostic methods for the spatially resolved measurement of gas temperature, key intermediates (OH, CH, HCN, C2H2) and particles, and analyze the results using theoretical and numerical models. A particular current emphasis is on modern combustion techniques, such as Moderate or Intense Low oxygen Dilution (MILD) combustion, which can have a high impact on reducing the carbon footprint of high-temperature industrial combustion systems.
Ignition processes in future fuels
Here we measure and analyze the ignition properties of fuels to be used in the future energy infrastructure, such as hydrogen, hydrogen/hydrocarbon mixtures, and fuels of renewable origin.
For both areas, comparison of the results with those of numerical models using detailed chemistry provides insight into the adequacy of the models and guide the improvement of the chemical mechanisms used.
Formation of nanoparticles (soot, silica) in flames 2
In this project, which is nearing completion, various light-scattering methods are applied to understanding the formation and growth of nanoscale clusters of carbonaceous (soot) and silica particles in methane flames. The impact of hydrogen in the fuel on particle formation is a specific subject of study. The results have impact both in assessing the environmental impact of hydrogen/natural gas mixtures or siloxane-containing biofuels and with an eye towards flame synthesis of nanoparticles.
Flame propagation and Ignition of future fuels
This project examines the ignition and propagation of the flames of future fuels, for example dimethyl ether (DME), which is a fuel that can be made from renewable sources. The propagation properties, i.e., the laminar burning velocity, are essential for assessing the utility of new fuels in practice. Furthermore, the ignition properties are important for determining the use of these fuels in internal combustion engines. This project is also performed with the company DNV GL, who provides their ‘dual-fuel’ rapid compression machine to study the ignition of new fuels under conditions similar to those in diesel engines.
Flame structure and pollutant formation in MILD combustion using future fuels
Here, using the ‘laminar jet in hot coflow’ burner developed at the RUG, we explore the suitability of future fuels, such as hydrogen/natural gas mixtures or DME for use in MILD combustion systems. Laser diagnostics are used to examine flame structure and pollutant formation in both ‘normal’ and MILD combustion regimes, while the experiments also show how the transition from normal to MILD combustion can be utilized in practical systems.
1funded by the Dutch Technology foundation (STW)
2funded by Energy Delta Gas Research consortium (EDGaR)
|Last modified:||22 March 2019 08.58 a.m.|