BEGIN:VCALENDAR
VERSION:2.0
METHOD:PUBLISH
BEGIN:VEVENT
ORGANIZER;CN=ESTAD 2023:mailto:info@metec-estad.com
LOCATION:Room 16b
SUMMARY:Three-dimensional model for the reduction of a single porous iron oxide pellet in a direct reduction plant
DESCRIPTION:Increasing the use of hydrogen as reducing gas in direct reduction changes the reaction and operating conditions of the plant. Particle resolved computational fluid dynamics (PRCFD) offer insights into the surrounding gas flow and the reaction-diffusion mechanisms inside each pellet. As a first step, in this work a three-dimensional model of a single porous iron ore pellet is developed.
The model represents the pore diffusion and internal stepwise reduction reactions from iron(III)-oxide to iron with hydrogen and carbon monoxide. The reactions are implemented in the gas and solid species and energy conservation equations. The model is flexible regarding the operating conditions (e.g. temperature), the initial pellet morphology, the initial gas and pellet composition and the gas composition at the pellet surface. 
The model allows the locally resolved investigation of the reduction progress inside a single porous iron oxide pellet. Radial differences in solid mass fractions go along with a varying porosity of the pellet. The influences of diffusion and reaction kinetics are investigated depending on temperature and gas and pellet composition. Especially, the diffusion of the produced water to the pellet surface can be a limiting factor and is further investigated.  
We will discuss these results with literature data and own analyzations of direct reduction pellets. In perspective, the model will be used for a PRCFD simulation of different reactor sections.

CLASS:PUBLIC
DTSTART:20230614T102000
DTEND:20230614T104000
END:VEVENT
END:VCALENDAR