Output details

Effect of temperature gradient on industrial gasifier coal slag infiltration into alumina refractory

Slagging gasifiers offer flexibility of feedstock and with the use of biomass can operate under conditions approaching C neutrality. Refractory walls are however corroded by the molten ash causing shutdowns. The refractory of choice is Cr-oxide based but is costly and risks forming hazardous Cr (VI). In this work, alumina is investigated in a furnace design where a temperature gradient is induced to replicate operating conditions. It is found that infiltration can be limited by locally enhancing the ash viscosity by adding silica to the refractory. Through the US-DOE (Peter.Rozelle@HQ.DOE.GOV) and industries the potential of the work is being explored.