The time-dependent operation of methanol, ammonia, and urea production units embedded in a steel mill environment is analyzed with dynamic simulation models. From different process concepts and gas availability scenarios, a set of simulation cases is defined with blast furnace gas as carbon and coke oven gas as hydrogen source. Dynamic simulations indicate that significant CO(2)reductions require large amounts of additional H(2)from sustainable sources. From the results, global data such as carbon footprint or energy demands and details about process unit operation are obtained and processed.