Conferences

Kinetic Features of the Reduction of Iron Oxides Used for Hydrogen Production in Various Gases

 
.Pasichnyy
 

I. M. Frantsevich Institute for Problems of Materials Science of the NAS of Ukraine, Krzhizhanovsky str., 3, Kyiv, 03142, Ukraine
Powder Metallurgy - Kiev: Frantsevich Institute for Problems of Materials Science NASU, 2010, #03/04
http://www.materials.kiev.ua/article/1558

Abstract

The paper examines the physicochemical features of the reduction of iron oxides (as multicomponent scale waste) in various gases: H2, CH4, CO, and generator gas containing 33% CO and 67% N2. At the initial stage of reduction, the activity of the gases decreases in above sequence. It is studied how surface blocking of iron oxides by carbon formed in the conversion of methane and carbon monoxide influences the reduction processes. The deposition of carbon in these media is intensified when the degree of reduction achieves more than 70%. The thermodynamic dependencies of ox-ide reduction on the ratio of РСО2СО partial pressures are given. Noteworthy is high sensitivity of Fe3O4 and FeO reducing reactions to the change in СО2 content.


IRON OXIDES, REDOX CYCLE, REDUCING GASES, REDUCTION MECHANISM, SCALE WASTE