Formation of COx species during the carbothermal reduction of oxides of Zr, Si, Ti, Cr, W, and Mo

摘要: Abstract The formation of CO and 2 during the reduction ZrO , SiO TiO Cr O 3 WO MoO by carbon was studied using two methods: (1) carrier-gas hot-extraction method for oxygen determination in solids with dissolution melt just before reduction, (2) usual carbothermal carbide synthesis starting from oxide/carbon powder mixtures. In both cases, significant amounts were detected especially contrast to other oxides. kinetics a micro-scale situ analysis reaction gases . progress oxide can be qualitatively quantitatively measured at each moment experiments. Most results interpreted literature about oxide-specific mechanisms. some new aspects regarding role species discussed.