1 Catalytic oxidation of NO to NO 2 for nitric acid production over a Pt/Al 2 O 3 catalyst Ata ul Rauf Salman a , Bjørn Christian Enger b , Xavier Auvray a c , Rune Lødeng b , Mohan Menon d , David Waller d , Magnus Rønning a * a Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), Sem Sælands vei 4, NO-7491 Trondheim, Norway. b SINTEF Industry, Kinetic and Catalysis group, P.O. Box 4760 Torgarden, NO-7465 Trondheim, Norway. c Current address: Competence Centre for Catalysis, Chemical Engineering, Chalmers University of Technology, S-412 96 Gothenburg, Sweden d YARA Technology Center, Herøya Forskningspark, Bygg 92, Hydrovegen 67, NO-3936 Porsgrunn, Norway. * Corresponding author. Tel.: +47 73594121. E-mail address: magnus.ronning@ntnu.no (M. Rønning).