Gasification and structural behaviour of different carbon sources and resultant chars from rapid devolatilization for HIsarna alternative ironmaking process

To evaluate the potential of using renewable biomass in novel HIsarna technology, reactivity thermal coal (TC), charcoal (CC), Bana grass char (BGC) before and after rapid devolatilization at 1500 °C a drop tube furnace (DTF) was investigated. Thermogravimetric (TG) used for CO2 gasification study, high temperature confocal scanning laser microscope (HT-CSLM), Brunauer-Emmett-Teller (BET) electron microscopy (SEM) were to characterise morphology all three raw carbonaceous materials their chars produced by devolatilization. CC has fastest reaction heat treatment, BGC is more reactive than TC but have very similar behaviour. The index rapidly devolatilized reduced 84.21% (BGC), 92.11% (TC) 94.23% (CC) compared materials. This shows that severely affected devolatilization, this behaviour likely be governed ash content which will melt cause pore blockage during treatment. According HT-CSLM results average particle sizes decreased 28%, 24% 20 % TC, respectively. While SEM images shown gone through significant structural changes maintained parent shapes. BET indicate non-porous, both contain large number constricted micropores with significantly larger surface area.