1. Department of Materials Science and Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway
2. Elkem Technology, 4621 Kristiansand, Norway
3. SINTEF Industry, N-7465 Trondheim, Norway
4. Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway