hossein hemmati - Academia.edu (original) (raw)
Uploads
Papers by hossein hemmati
The devolatilization of a non-coking coal and the reduction of iron oxide fines by volatile matte... more The devolatilization of a non-coking coal and the reduction of iron oxide fines by volatile matter (VM) were studied non-isothermally using thermogravimetry(TG) inargon atmosphere. The devolatilization of the coal showed five differentregions in terms of the rate of devolatilization. The maximum rate of devolatilization and the maximum weight loss occur between 640 o C and 725 o C furnace temperature.The effect of the heating rate and the coal particle size on devolatilizatoin were studied. Increasing the heating rate and theparticle size resulted in lower devolatilization.Non-isothermally reduction of iron oxide by VM in a multi-layered array was investigated. A reduction degree of 40 percent was reached while heating the pack from room temperature to 950 o C.Three distinct regions of reduction were observed for reduction of Fe2O3. The XRD patterns were confirmed the stepwise reduction of iron oxide.
The devolatilization of a non-coking coal and the reduction of iron oxide fines by volatile matte... more The devolatilization of a non-coking coal and the reduction of iron oxide fines by volatile matter (VM) were studied non-isothermally using thermogravimetry(TG) inargon atmosphere. The devolatilization of the coal showed five differentregions in terms of the rate of devolatilization. The maximum rate of devolatilization and the maximum weight loss occur between 640 o C and 725 o C furnace temperature.The effect of the heating rate and the coal particle size on devolatilizatoin were studied. Increasing the heating rate and theparticle size resulted in lower devolatilization.Non-isothermally reduction of iron oxide by VM in a multi-layered array was investigated. A reduction degree of 40 percent was reached while heating the pack from room temperature to 950 o C.Three distinct regions of reduction were observed for reduction of Fe2O3. The XRD patterns were confirmed the stepwise reduction of iron oxide.