Clean Combustion Winter School
Understand what makes fuels burn, and how to
design the fuels for a sustainable future. Rapid compression machines, shock
tubes, electron guns, cool flames or the newest kinetic models to understand
how fuels burn.
9:00 - 10:30 AM
Class 1: Fuel Characterization
Class 3: Fuel Design
Class 4: E-fuels and Carbon Capture
10:30 – 12:00 PM
12:00 – 01:00 PM
01:00 – 05:00 PM
Lab tour & Safety training
The twin-opposed piston RCM facility at KAUST
The students will learn how to
measure homogeneous ignition delay times using a rapid compression machine (RCM)
facility. They will prepare mixtures of fuel and air in a specially designed
mixing vessel. The students will then learn to operate the RCM and will achieve
various compressed pressures and temperatures to generate an ignition delay vs
Shock tubes may be classified as ideal zero-dimensional reactor to study fuel chemistry and autoignition behavior. In addition to ignition delay times, the shock tubes serve as idea devices to measure reaction rate constants and species time-histories. These measurements require the application of laser diagnostics in shock tubes. The students will learn how to setup an absorption diagnostic on the shock tube and will measure reaction rate constant of H-abstraction by OH radicals with the help of a UV laser at 306 nm.
Molecular beam mass spectrometer for high fidelity measurements of combustion intermediates
Electron Impact Ionisation–Molecular Beam Mass Spectrometry (EI-MBMS) is sampling system for identification and quantification of reactants, intermediates, and products. The sampling of the reactor contents is done by a quartz nozzle and a skimmer, which allows for the formation of a molecular beam. The sampled molecules are ionized by electrons generated with an electron gun whose energy and flux can be controlled. The ions are directed by optics to a Time of Flight (TOF) tube where they are separated by their mass to charge ratios. In this lab, students will apply MBMS techniques to study the complex intermediates formed in a combustion process.
Combustion mechanisms include both low and high temperature reaction classes with rate coefficients either adopted from literature or calculated using computational methods. The models are validated against experimental ignition delay data from shock tubes and rapid compression machines or speciation data from jet stirred reactors. In this lab, the students will develop learn the computational tools to develop kinetic models and to simulate chemical kinetics in ideal reactors.
A better knowledge of combustion processes in transport affected environments facilitates the understanding of ignition events in practical combustors. The counterflow facility is an atmospheric pressure setup designed to understand the interaction between flow and chemistry in diffusion flames. In this lab, the main focus is measurements of autoignition temperature, extinction limits, and flame structure of various liquid and gaseous fuels. The lab will study cool flames for various conventional and alternative fuels.