Effect of gas composition on the kinetics of iron oxide reduction in a hydrogen production process

The limitations on organic detection in Mars-like soils by thermal volatilization–gas chromatography–MS and their implications for the Viking results

“…This water originates from the oxidation of hydrogen catalyzed by hematite. This result is consistent with previous studies on the reduction of pure hematite, where the highest reduction rates occur at temperatures of Ն910°C (28).…”

“…and This process takes place at temperatures of Ͻ1,000°C (27)(28)(29), but the reduction is kinetically controlled by hydrogen pressure (29) and temperature (27,28,30). We have experimentally studied the oxidation of hydrogen to water by the hematite present in the NASA Mars-1 martian soil simulant in the temperature range from 200°C to 1,200°C.…”

Electroreduction of Iron(III) Oxide Pellets to Iron in Alkaline Media: A Typical Shrinking-Core Reaction Process

“…[20][21][22][23][24][25][26][27][28][29][30][31][32] Moreover, the gaseous reduction of iron oxides to metal iron by hydrogen gas has also been recognized as an environmental friendly way. [33][34][35][36] However, high cost of hydrogen production is still a challenge for iron and steel industry. [34][35][36] On the contrary, the inherent advantage of the electrochemical process is its environmental compatibility since the electron is a ''clean/green'' reagent.…”

“…[33][34][35][36] However, high cost of hydrogen production is still a challenge for iron and steel industry. [34][35][36] On the contrary, the inherent advantage of the electrochemical process is its environmental compatibility since the electron is a ''clean/green'' reagent. [37][38][39] Li et al [17] and Haarberg et al [40] successively obtained pure iron metal from iron(III) oxide by the direct electroreduction/electrodeposition routes in molten salts at temperature >1073 K (800°C).…”

Flash Suspension Reduction of Ultra-fine Fe₂O₃ Powders and the Kinetic Analyzing

“…In other words, the internal diffusion resistance is negligible at initial stage and becomes more and more significant at later stage. 25,26) Simultaneously, the intercepts of the lines decrease with the reaction progress, which indicates that the k + increases while the η c (reaction resistance) decreases with the reaction progress for each reduction temperatures. Moreover, the intercepts at initial stages generally declined with the increase of temperature, so it provides evidence that the reaction resistance generally declined with the increase of temperature.…”