Agglomeration during reduction of MoO3

Mechanism and kinetic study of hydrogen reduction of ultra-fine spherical MoO3 to MoO2

“…It may be the reason for the phenomenon that the particles became larger as increasing the temperature. Furthermore, the agglomeration may be also resulted from the formation of eutectic between MoO 3 and Mo 4 O 11 , which has a much lower melting point (823 K to 873 K) [4]. Therefore, the agglomeration and sticking of products are due to the combination of the local temperature increase and the formation of eutectic, which are in well agreement with the results of Enneti and Wolfe [4].…”

“…The industrial production of metallic molybdenum powders is a stepwise process that begins with the reduction of MoO 3 to MoO 2 by hydrogen [3][4][5]. This step is an important stage in producing metallic molybdenum, since it has a great influence on the purity and morphology of produced metal molybdenum products [3].…”

Phase Transitions and Morphology Evolutions during Hydrogen Reduction of MoO3 to MoO2

“…An autocatalytic comproportionation mechanism was proposed by Lalik [1] The phase transitions and the morphology evolutions during the reduction of MoO 3 to MoO 2 are very important in order to obtain molybdenum powder with good sinter ing properties [18]. However, there has so far been no de tailed paper to report the morphology evolutions during the reduction.…”

Study on oxidation mechanism and kinetics of MoO2 to MoO3 in air atmosphere

“…Among these, MoO 3 and MoO 2 are the most thermodynamically stable phases. Consequently, the mechanism and kinetics of hydrogen reduction of MoO 3 to MoO 2 have been widely studied by many investigators [10][11][12][13][14][15][16][17][18][19] in the past decades. However, only several studies [20][21][22][23][24][25] have been carried out with respect to the oxidation of MoO 2 to MoO 3 .…”