Modeling and Economic Assessment of Integrated Gasification with Sorbent CO2 Capture

TL;DRAbstract

Uncertainty in the price of conventional energy sources, such as oil and natural gas, along with increasing evidence of climate change have rekindled great interest in the development of processes that can produce clean synthetic gasses (hydrogen and carbon monoxide). In this context, gasification of carbonaceous solids followed by syngas conversion processes have taken a center stage. In the first part of this study, two approaches for simulation of coal gasification process in a bubbling fluidized bed reactor are studied. The first method is an equilibrium model based on minimization of Gibbs free energy which predicts the thermodynamic limits of the product gas composition for an air-blown coal gasifier. The thermodynamic equilibrium model is further modified by introducing an approach temperature which corresponds to the deviation from equilibrium condition. The major components in produced gas, H2, H2O, CH4, CO, CO2, and N2 have been determined and compared with the pure equilibri

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