• Seftejani, Masab Naseri
• Schenk, Johannes

Abstract

<p>Hydrogen plasma smelting reduction (HPSR) has been established as an alternative to existing iron- and steelmaking processes to reduce the emission of greenhouse gases. In HPSR, hydrogen is activated in the plasma arc zone and becomes partially atomized and ionized. Activated hydrogen particles are strong reducing agents for iron oxides. This study provides an overview for generating hydrogen plasma in an arc plasma reactor by collisional processes and discusses about the reduction ability of hydrogen species in terms of kinetics and thermodynamics. Moreover, the reduction rates of molten iron oxide by various reducing agents are compared. The results show that hydrogen in the plasma state is the strongest reducing agent. In addition, the arc temperature is the main parameter influencing the degree of hydrogen ionization and consequently the reduction rate of iron oxide.</p>

Topics

• impedance spectroscopy
• Hydrogen
• iron