Contribution information

Title Simulation of RDF gasification in Aspen Plus
Status Accepted
Final type Poster
Final session WAS&BIO - Waste and biomass as sustainable energy and material sources
Authors P., Steltenpohl1, K., Nagy2, J., Haydary3
1 FCHPT, STU Bratislava, Bratislava, Slovakia
2 Slovak University of Technology, Bratislava, Slovakia
3 Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Bratislava, Slovakia
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Brief content Thermochemical processes of Municipal Solid Waste (MSW) treatment represent thermal conversion of waste to thermal energy or a process gas. Three types of processes are used for thermochemical conversion of solid waste: incineration, pyrolysis and gasification. Gasification is employed for e.g. conversion of Refuse Derived Fuel (RDF) into process gas which can be used either for synthesis gas production (material utilization of RDF) or as an energy source (energy utilization of RDF). Here, results of simulation of the RDF gasification in Aspen Plus are presented. Further, the effect of reaction conditions on the process gas composition was monitored with the aim to adjust model of the gasification reactor so that composition of the obtained products was similar to that formed under industrial conditions. For this purpose, modifications of gasification reactor were carried out. In the Aspen Plus environment gasification reactor consists of several units corresponding to the reactor zones. The first device was a reactor simulating formation of volatiles by the RDF feed heating followed by its thermochemical decomposition. The energy required for this reactor zone was obtained in a reactor in which the volatiles were partially combusted by the added gasification medium, oxygen. Original gasification reactor was modified by introducing a reactor model simulating kinetics of the most important gasification reactions, taking place between the process gas components as well as between carbon and oxygen under the gasification reactor operation conditions. Simulations using modified model of reactor for RDF gasification yielded process gas compositions largely in line with the results published in literature.
ID 342