Dynamics of Adsorption of Kr and Xe on MS5A and Activated Charcoal
Dynamics of Adsorption of Kr and Xe on MS5A and Activated Charcoal
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MS5A 和活性炭对 Kr 和 Xe 的吸附动力学
DOI：
10.1252/jcej.34.853
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发表时间：
2001
影响因子：
0.8
通讯作者：
M. Nishikawa
中科院分区：
文献类型：
--
作者：
K. Munakata;Ken;Satoshi Yamatsuki;Teruki Fukumatsu;S. Kanjo;Yoshihiro Yokoyama;M. Nishikawa
采用填料床柱研究了核后处理废气中Kr和Xe在代表性吸附剂（MS5A和活性炭）上的吸附动力学。通过对质量平衡方程的直接数值计算，分析了实验突破曲线。分析结果表明，MS5A吸附剂对Kr和Xe的吸附是孔隙扩散控制。对于Kr和Xe在活性炭上的吸附，发现表面扩散对吸附物分子的迁移有很大的促进作用。这些结果表明，在较低温度下，活性炭吸附剂的动力学吸附性能在表面扩散的作用下得到增强。此外，利用不同的模型对实验结果进行了表面扩散系数的量化。
The dynamics of adsorption of Kr and Xe, which are constituents of the off-gas from the nuclear reprocessing process, on representative adsorbents (MS5A and activated charcoal) was studied using packed bed columns. The experimental breakthrough curves were analyzed by conducting direct numerical computations of the mass balance equations. The results of the analysis show that adsorption of Kr and Xe on the MS5A adsorbent is the pore diffusion control. With regard to the adsorption of Kr and Xe on the activated charcoal, it was found that the surface diffusion considerably contributes to the migration of adsorbate molecules. These results suggest that the kinetic adsorption performance of the activated charcoal adsorbent is enhanced even at lower temperatures with the help of the surface diffusion. Furthermore, the surface diffusivities were quantified from the experimental results using several models.