1. German Research Centre for Geosciences (GFZ), Helmholtz Centre Potsdam, Telegrafenberg, 14473 Potsdam, Germany
2. Department of Engineering Geology and Hydrogeology, RWTH Aachen University, Lochnerstrasse 4-20, 52064 Aachen, Germany
3. Institute of Geology and Geochemistry of Petroleum and Coal, RWTH Aachen University, Lochnerstrasse 4-20, 52064 Aachen, Germany
4. Unit of Technology of Fuels, RWTH Aachen University, Wüllnerstrasse 2, 52056 Aachen, Germany
5. DMT GmbH & Co. KG, Am Technologiepark 1, 45307 Essen, Germany