CAJ | 학술논문

为阐明六氟化钼(Molybdenum hexafluoride, MoF6)在氟化钠(Sodium fluoride, NaF)颗粒上的吸附机制，在静态吸附实验装置上研究了MoF6在NaF颗粒上的吸附平衡及吸附动力学行为，结果表明在50?100oC内，NaF颗粒对MoF6的吸附速率和平衡吸附量随着温度而升高，在100oC平衡吸附量达到115mg MoF6·g?1 NaF。当温度超过100oC时，NaF对MoF6的吸附作用减弱，吸附量减小。Langmuir模型能较好描述NaF颗粒对MoF6的吸附过程，并推测MoF6在NaF颗粒上的吸附为单分子层吸附。吸附动力学模型分析表明，NaF颗粒对MoF6的吸附符合准二级动力学方程，同时吸附过程受到颗粒内扩散控制，但其并不是唯一速率控制步骤。
위천명륙불화목(Molybdenum hexafluoride, MoF6)재불화납(Sodium fluoride, NaF)과립상적흡부궤제，재정태흡부실험장치상연구료MoF6재NaF과립상적흡부평형급흡부동역학행위，결과표명재50?100oC내，NaF과립대MoF6적흡부속솔화평형흡부량수착온도이승고，재100oC평형흡부량체도115mg MoF6·g?1 NaF。당온도초과100oC시，NaF대MoF6적흡부작용감약，흡부량감소。Langmuir모형능교호묘술NaF과립대MoF6적흡부과정，병추측MoF6재NaF과립상적흡부위단분자층흡부。흡부동역학모형분석표명，NaF과립대MoF6적흡부부합준이급동역학방정，동시흡부과정수도과립내확산공제，단기병불시유일속솔공제보취。
Background:The fluoride volatility processhas been developed to recover uranium from spent nuclear fuel. And the fluoride adsorption and desorption technique is usually applied to the purification of UF6 in the fluoride volatility process.Purpose: This study aims to investigate the adsorption mechanism of MoF6 on NaF adsorbent. Methods: The adsorption equilibrium and kinetics of MoF6 on NaF adsorbent at different temperatures and initial MoF6 pressure were experimentally studied by using statistic adsorption equipment. Langmuir adsorption model and adsorption kinetics model were applied to analyse experimental data.Results:The adsorption rate and equilibrium adsorption capacity of MoF6 on NaF adsorbent increased with the temperature increasing from 50 oC to 100 oC, and the adsorption capacity was 115 mg MoF6·g?1 NaF at 100 oC.The experimental data were fitted by pseudo-second-order kinetics as well as Langmuir adsorption model.Conclusion:The adsorption of MoF6on NaF adsorbent was monolayer adsorption according to Langmuir adsorption model, and was controlled by diffusion of MoF6 inside NaF adsorbent which was not the unique rate-determining step, though.