SYNTHETIC NATURAL GAS (SNG) FROM PETCOKE: MODEL DEVELOPMENT AND SIMULATION

In this work the issue of producing SNG from petcoke was addressed by developing a complete process. First, a model for coal gasification, taking into account kinetics and mass transfer was developed; the simulation model was applied to a conceptual dual bed gasification (Sudiro et al., 2008). Then, a process to produce synthetic natural gas (SNG) from syngas was developed, facing the main issue of this process: the temperature control of the methanator. Performances of the global process simulated with Aspen PlusTM have been evaluated, with respect to product yield, CO2 emissions and overall energy efficiency.