A slag flow model was developed for the membrane wall gasifier by coupling the 3D gasifier model

the one-dimensional slag model and the particle trap model. The influence of particle behavior and O/C (ratio of oxygen to coal) on slagging of gasifier was demonstrated. Differences between membrane wall gasifier and refractory wall gasifier were shown. The larger particle benefited the capture efficiency and formation of slag layer

while the smaller one favored high carbon conversion. The thermal resistance of solid slag layer accounted for a large proportion in the membrane wall gasifier

thus it could protect silicon carbide layer and membrane wall from thermal corrosion.