CASE STUDY: EFFECT OF ZIRCONIUM ON THE TEXTURAL AND CATALYTIC PROPERTIES OF MAGNETITE

MARIA DO CARMO RANGEL; SERGIO GUSTAVO MARCHETTI; AMALIA LUZ COSTA PEREIRA; PETERSON SANTOS QUERINO; ALBERTO ALBORNOZ

Advanced Solid Catalysts for Renewable Energy Production

IGI Global

Lugar: Pennsylvania ; Año: 2018; p. 216 - 241

The effect of zirconium on the textural and catalytic properties of magnetite for the water gas shift reaction (WGSR) at high temperatures was studied in this work. The reaction is an important step in the industrial production of pure hydrogen. Samples with different amounts of zirconium (Zr/Fe (molar)= 0.1; 0.2;0.3; 0.4 and 0.5) were prepared from the decomposition of iron(III)hydroxoacetate doped with zirconium. It was found that zirconium increased the specific surface area of magnetite acting as spacer on the surface where it keeps the particles apart. Except for the zirconium-poorest solid, tetragonal zirconia was detected besides magnetite for all solids. Zirconium decreased the intrinsic activity of the catalysts but stabilized the specific surface areas during reaction and made the magnetite reduction to metallic iron more difficult. The zirconium-poorest is as active as magnetite and more resistant against deactivation by sintering and overreduction being attractive for WGSR.