Photon Tools for Physical Chemistry 2014

Session

Session 3 Spray and particulate matter (Ossler)

30 Sept 2014, 08:00

15. Developments of in-situ X-ray scattering diagnostic tools for studies of combustion and reactive systems

Prof. Frederik Ossler (Combustion Physics, Lund University, Sweden)

30/09/2014, 08:00

Talk

Emerging high brilliance X-ray radiation at different accelerator facilities around the world will give access to many types of new studies in-situ under complex experimentally challenging dynamic conditions: High temperatures, pressures, and densities, which also can present strong gradients. During the last decade our group has been performing experiments at MAX-lab, the APS, and the ESRF....

11. X-Ray Diagnostics of Cavitation and Sprays

Dr Christopher Powell (Argonne National Laboratory)

30/09/2014, 08:25

Talk

Scientists at Argonne National Laboratory have been developing synchrotron-based diagnostics for fuel injection, cavitation, and sprays. This presentation will outline the capabilities of several diagnostics, including time-resolved radiography, small-angle scattering, x-ray flourescence, and phase contrast imaging. Applications of these techniques to measurements of droplet size, cavitating...

42. Barrierless proton transfer across weak CH•••O hydrogen bonds in dimethyl ether dimer

Prof. Ruth Signorell (Laboratory of Physical Chemistry, ETH Zürich, Zürich, 8093, Switzerland)

30/09/2014, 08:50

Talk

Proton transfer is of general interest due to the important role it plays in biological, chemical and atmospheric sciences. Hydrogen bonds are known to facilitate inter- and intra-molecular proton transfer, defining a coordinate for the transfer to proceed. The observation of protonated cluster fragments upon photoionization is typically explained by a fast intermolecular proton transfer...

16. In-situ Soft X-Ray Absorption Spectroscopy of Flames

Dr Jonathan Frank (Combustion Research Facility, Sandia National Laboratories)

30/09/2014, 09:15

Talk

The feasibility of in-situ soft x-ray absorption spectroscopy for imaging carbonaceous species in hydrocarbon flames is demonstrated using synchrotron radiation. Soft x-rays are absorbed by core level electrons in all carbon atoms regardless of their molecular structure. Core electron spectroscopy affords distinct advantages over valence spectroscopy, which forms the basis of traditional...

26. VUV Photoelectron Spectroscopy of Aqueous Aerosols

Prof. Chia Wang (National Sun Yat-sen University)

30/09/2014, 10:10

Talk

The crucial roles of aerosols have been increasingly recognized in a variety of important research fields, encompassing the atmospheric chemistry, the environmental science and the planetary science. Recently, the implications of aerosols in the biomedical science, pharmaceutical administration and micro-fabrications of nano-structured novel materials have also been actively explored. To probe...

27. Studies of combustion engine exhaust: An in-situ laser induced fluorescence oil consumption method and simulations of Diesel particulate matter via laser desorption time of flight mass spectrometry.

Mr Eduardo Alonso-Gil (Technische Universität München)

30/09/2014, 10:35

Talk

Combustion engines are still largely the most commonly used in the automobile industry. Higher efficiency and a better knowledge of internal processes are constantly pursued by engineers. Optimization and improvements can be made by monitoring the exhaust stream. Oil consumption method is one of the most interesting techniques to reach that goal. In-situ and on-line techniques based in SO2...

8. SIMULTANEOUS X-RAY RADIOGRAPHY AND X-RAY FLUORESCENCE MEASUREMENTS FOR AERATED-LIQUID SPRAYS

Dr Kuo-Cheng Lin (Taitech, Inc.)

30/09/2014, 11:00

The aerated-liquid (or effervescent, or barbotage) jet is a promising fuel injection scheme for efficient combustion in high-speed air-breathing propulsion systems. By preparing a two-phase mixture inside the injector with a small amount of gas to mix with the liquid fuel, the resulting aerated-liquid jet is capable of generating a well-dispersed plume for effective mixing with the ambient air...

33. Probing Molecular Weight Growth and Decomposition of Organic Particles in Planetary Atmospheres Using Vacuum Ultraviolet Photoionization Mass Spectrometry

Dr Kevin R. Wilson (Chemical Sciences Division, Lawrence Berkeley National Laboratory)

30/09/2014, 11:25

Talk

The heterogeneous chemical transformations of organic aerosols in planetary atmospheres is governed by complex free radical chemistry. Free radical reaction pathways lead to both molecular weight growth and decomposition of the aerosol. In Earth’s atmosphere, developing a molecular level understanding of aerosol oxidation chemistry requires deeper insight into the role of peroxy and alkoxy...