A comprehensive simulation of catalytic coal gasification in a pressurized jetting fluidized bed

A steady-state multi-zone empirical model for catalytic coal gasification in a pressurized jetting fluidized bed was developed, which took account of pressurized hydrodynamics, mass and heat transfers and catalytic reaction kinetics. The effects of combustion product distribution coefficient and steam gasification product distribution coefficient on hydrodynamic parameters, particle temperature, gas temperature and compositions were conducted to find the suitable ones. The calculated bed temperature and gas compositions showed good agreement with experimental results. The hydrodynamics behaviors and gas compositions in different zones were analyzed in detail. The effects of control parameters on catalytic reactions were further conducted. Results showed that the most important factors for methanation were particle size, bed height and catalyst loading. The effects of particle size and steam flow rate on steam gasification reaction and water gas shift reaction were also obviously. The model would provide basically information to support design and scale-up of catalytic coal gasification.

Automated summary

A steady-state multi-zone empirical model for catalytic coal gasification in a pressurized jetting fluidized bed was developed. The model took into account pressurized hydrodynamics, mass and heat transfers, and catalytic reaction kinetics. The calculated results showed good agreement with experimental data, and the effects of control parameters on catalytic reactions were analyzed. The results indicated that particle size, bed height, and catalyst loading were the most important factors for methanation.