1. Catalytic Processes & Materials, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
2. Ammonia Energy Association, 77 Sands Street, 6th Floor, Brooklyn, NY 11201, USA
3. Koolen Industries, Europalaan 202, 7559 SC Hengelo, The Netherlands