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May 31st 2018
Seminar
The salinity difference between river- and sea-water gives rise to a free energy difference of 2kJ per liter river water, which corresponds to a waterfall of 200 meter. This “blue energy” can be harvested fully sustainably in principle, and nowadays also largely in practise with the use of ion-selective membranes or supercapacitors. Most experiments so far involve cold river- and sea water, but our calculations show that warm river water (heated by waste heat) of 50 degrees can double the amount of harvestable blue energy.
May 24th 2018
Seminar
Recently, electrochemistry and the so-called electrification of the chemical industry have gained a prominent position on the agenda of governments, industry and academics. The majority of the research focusses on fundamentals of the electrochemistry and the accompanying selection and optimization of materials. Far less attention is paid to process technological issues such as: scale of operation, overall mass and energy balances, equipment design and economics.
May 17th 2018
Seminar
Electrolytes respond to contact with a charged solid surface (metal electrode, semiconductor or insulating ionic solids) by formation of an electric double layer. The modelling of electric double layers at an atomistic level remains a major challenge. A well known technical problem is of course how to fit models of electric double layers in the periodic cells commonly used in atomistic simulation. However, there remain even open questions of a more fundamental nature.
May 15th 2018
Seminar
NOTE: different day and time: Tuesday 10h00  The National Spherical Torus Experiment – Upgrade (NSTX-U), will be one of the highest power-density magnetic fusion experiments when operating at full parameters.  Following a failure in a poloidal field coil, the NSTX-U entered the Recovery Project which is redesigning several key components in order to increase operational reliability.  Among these are the plasma-facing components for both high-heat flux and low-heat flux regions of the machine.  Building on previous design experience with castellated tiles, the new high-heat
April 26th 2018
Seminar
The combination of a widely tunable infrared laser source with tandem mass spectrometry enables the routine recording of IR spectra of gaseous molecular ions. With the aid of theoretically predicted vibrational spectra, these IR spectra can be used to derive molecular structure information on the ionized species. As an example, the sites of protonation, deprotonation or metal ion attachment in a molecule can be accurately determined using “infrared ion spectroscopy” (IRIS).

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