During the production of molybdenum, the first reduction step of molybdenum trioxide to molybdenum dioxide is crucial in directing important product properties like particle size and oxygen content. In this study, the influence of heating rate, hydrogen flow, and potassium content on the reduction of MoO₃ has been investigated viain situ X-ray powder diffraction. For low heating rates, a molybdenum bronze H_xMoO₃ could be confirmed as an intermediate, while γ-Mo₄O₁₁ can only be observed at high heating rates. Molybdenum formation at temperatures as low as 873 K can be controlled via hydrogen flow. The potassium content of reactants has a direct influence on the amount of Mo₄O₁₁ formed during the reaction as well as rates of Mo₄O₁₁ and MoO₂ formation.

中文翻译：

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钼生产过程的原位X射线衍射研究

在钼的生产过程中，将三氧化钼还原为二氧化钼的第一步对于指导重要的产品特性（如粒度和氧含量）至关重要。本研究通过原位X 射线粉末衍射研究了加热速率、氢气流量和钾含量对 MoO _{3还原的影响。}对于低加热速率，钼青铜 H _x MoO ₃可以被确认为中间体，而 γ-Mo ₄ O ₁₁只能在高加热速率下观察到。在低至 873 K 的温度下钼的形成可以通过以下方式控制氢气流量。反应物的钾含量直接影响反应过程中形成的Mo 4 O 11 的量以及Mo ₄ O _11和MoO ₂的_形成速率。