Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 15 1 2025 03 21 Analysis of molybdenite powder reaction rate and temperature effect on reaction time Analysis of molybdenite powder reaction rate and temperature effect on reaction time 83 91 3486 10.22044/jsfm.2025.14657.3869 FA Abdollah Shabani Shahrbabaki Mechanical department, Yazd University, Yazd Vali Kalantar Department of mechanical engineering, Yazd university Journal Article 2024 06 10 In this work, the reaction rate of molybdenite powder is calculated and the effects of temperature on the reaction rate and reaction time are investigated. The particle temperature is obtained by solving the heat transfer equation, including convection, conduction, and radiation terms. The particle diameter is assumed to be 100 μm and the porosity is 50%. The results show that the particle temperature reaches the fluidized bed temperature in 365 seconds and the reaction time is around 5000 seconds. According to the results, during the time interval between 500 seconds and 1800 seconds, the temperature of the particles is higher than 600 °C, which causes sintering in the molybdenum trioxide. The fluidized bed temperature must be decreased, and the gas velocity must be increased to prevent sintering. The results are in good agreement with the experimental data. This article is part of a study on the design and construction of a fluidized bed furnace. For the first time in the country, a pilot-scale fluidized bed roaster has been built based on these results. In this work, the reaction rate of molybdenite powder is calculated and the effects of temperature on the reaction rate and reaction time are investigated. The particle temperature is obtained by solving the heat transfer equation, including convection, conduction, and radiation terms. The particle diameter is assumed to be 100 μm and the porosity is 50%. The results show that the particle temperature reaches the fluidized bed temperature in 365 seconds and the reaction time is around 5000 seconds. According to the results, during the time interval between 500 seconds and 1800 seconds, the temperature of the particles is higher than 600 °C, which causes sintering in the molybdenum trioxide. The fluidized bed temperature must be decreased, and the gas velocity must be increased to prevent sintering. The results are in good agreement with the experimental data. This article is part of a study on the design and construction of a fluidized bed furnace. For the first time in the country, a pilot-scale fluidized bed roaster has been built based on these results. https://jsfm.shahroodut.ac.ir/article_3486_f5bc388dca31f7e6da81c1cc4b43eb76.pdf