BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16b
SUMMARY:Influence of water content on the kinetics and mechanisms of hydrogen reduction using industrial iron ore pellets at 600 °C - 900 °C 
DESCRIPTION:Hydrogen reduction of iron ore, to reduce carbon emissions in the steel industry, is a plausible way forward as focus on fossil free production increase. The CO2 byproduct, generated by carbon reduction, is negated and replaced with H2O. In a Hydrogen Direct Reduction shaft, both temperature and pH2O will vary over the shaft height. Lower temperature and higher pH2O found at the top. The reduction reaction with hydrogen is highly dependent on the temperature and pH2/pH2O ratio. Lower temperature and higher pH2O would result in a lower reduction rate. Since only a few systematic studies have been conducted, this work aims to study the effect of pH2O over a temperature range relevant to industrial practice. A resistance heated furnace and a water vapor generator is employed to investigate the 0-15% pH2O range, in the 600 °C – 900 °C temperature range. To produce reliable data, the water content in the gas must be accurately controlled. A system is carefully designed to ensure precise control of the water content in the reaction gas. To further the industrial context, industrially produced iron ore pellets are utilized. Thermal Gravimetric Analysis (TGA) is used to follow the reduction. To understand the reaction mechanisms, SEM is used to study the microstructure of partially reduced pellets. Results suggest the reduction rate is profoundly affected by water at low temperatures, less so when the temperature is increased. The microstructure is highly affected by pH2O at 600 °C, at higher temperatures the microstructure is largely unaffected.  Reaction mechanisms are discussed based on the reduction curves and micrographs. The impacts of gas dilution and chemical reaction rate are evaluated. 
CLASS:PUBLIC
DTSTART:20230614T100000
DTEND:20230614T102000
END:VEVENT
END:VCALENDAR