About This Presentation
Dr. Hong-Shig Shim – Reaction Engineering International
Summary. Gas-phase chemical reactions can be modeled with a detailed mechanism, which usually includes many chemical species and several hundred reversible elementary reactions. However, implementation of a detailed chemical mechanism into a CFD code is prohibitive from the standpoint of both computational time and memory. Thus, our approach is to develop a reduced description of the detailed chemistry and implement it into a CFD framework. CPFD’s Barracuda has been used to evaluate particle flow behavior and the related chemistry in a dense flow reactor such as chemical looping combustion system. In this effort, the reduced mechanism is developed under chemical looping combustion relevant temperature and pressure conditions and interfaced with Barracuda with CPFD’s help. A detailed mechanism with 93 chemical species and 495 reversible elementary reactions was used to generate a reduced mechanism with 25 species that was found to give excellent agreement with detailed chemistry, with acceptable computational demands using CPFD’s Barracuda implementation.
About the speaker. Dr. Shim has worked for over 20 years in the fields of energy and environment focusing on utilizations of coal, oil, gas, and biomass. He has built and managed various international projects such as ultra supercritical steam power plant design evaluation and simulator development, NOx control strategy evaluation, coal/biomass gasification kinetics, oxy-firing assessment to mitigate CO2 emission, and advanced tool development. His Ph.D. research completed at Brown University investigated thermal annealing of coal char at high temperature and developed image processing algorithm and structure parameters for nanostructure of carbonaceous material including coal char, graphite, and soot.