Ralf Köpsel

Catalytic influence of ash elements on NOx formation in char combustion under fluidized bed conditions

Ralf Köpsel, Sven Halang, R. Köpsel, 1997 .

The fate of nitrogen during pyrolysis of German low rank coals — a parameter study

J Friebel, Ralf Köpsel, J. Friebel, 1999 .