ENVIRONMENTAL INTEGRATED PRODUCTION PLANNING FOR THE AMMONIA-SYNTHESIS

The efficient operation of existing plants in the process industries r equires an adjustment of the technical parameters with respect to chan ging economic or environmental constraints. In this work a model is pr esented that enlarges the well known linear optimisation models for jo int production planning problems, that are typical fbr the process ind ustries, by integrating byproducts and residues as well as emission ta xes. With respect to the technical implications of a real world proces s the model is based on thermodynamic equilibria calculations and ther efore formulated as a nonlinear optimisation model. The model is imple mented with the help of the process simulation system ASPEN PLUS and a pplied as an example to a real world ammonia synthesis plant.