(117k) Optimization of Synthesis Gas Cleanup and CO2 Sequestration Processes in the Igcc Plant

A high-temperature carbon dioxide removal process within the Integrated Gasification Combined Cycle (IGCC) will result in higher plant efficiency. Four different high-temperature carbon dioxide capture technologies were evaluated in an Aspen Plus® model to determine which one results in lower parasitic energy losses. An optimization scheme for the heat recovery steam generator (HRSG) power output was developed, allowing us to evaluate different technologies reviewed from literature. The model approach was to focus on the overall energy balances in the IGCC plant determined from the different technologies: pressure swing adsorption, temperature swing adsorption, hydrogen selective membranes, and carbon dioxide selective membranes. Based on our analysis, we found out that pressure swing adsorption had the best performance among all the evaluated technologies. However, carbon dioxide selective membranes and hydrogen selective membranes also showed promise and are worthy of further investigation.