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For the design and operation of fixed bed gasifiers the understanding of the occurring physicochemical phenomena is essential. In this work, to study the fluid flow, heat and mass transfer as well as chemical reactions a particle-resolved CFD-model is presented. The two-dimensional approach was validated against experiments and simulations for different conditions were conducted and the resulting...
The newly developed HITECOM reactor provides the possibility of in-situ analysis of single particle reactions. It combines the capabilities of a magnetic suspension thermobalance with state of the art optical analysis. The surface temperature and carbon conversion of single particles are measured under well-defined flow conditions. The generated data enables the detailed validation of CFD single particle...
Thermogravimetric analysis is a standard experimental method to determine kinetic data for heterogeneous coal char reactions. However, it is necessary to implement a sample holder to weigh the char sample, which may influence the mass and heat transfer towards the crucible. Thus, in this work the heat and mass transfer phenomena in a TGA were investigated. Experiments were carried out with hearth...
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