Adsorption equilibria of krypton, xenon, nitrogen and their mixtures on molecular sieve 5A and activated charcoal
Adsorption equilibria of krypton, xenon, nitrogen and their mixtures on molecular sieve 5A and activated charcoal
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DOI：
10.1080/18811248.1999.9726272
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发表时间：
1999-09-01
影响因子：
1.2
通讯作者：
Nishikawa, M
中科院分区：
文献类型：
--
作者：
Munakata, K;Fukumatsu, T;Nishikawa, M
研究了核后处理废气组分Kr: Xe和N-2在代表性吸附剂（分子筛5A （MS5A）和活性炭）上的吸附平衡。采用填充床柱，在77 ~ 323K的温度范围内进行吸附实验。利用空位溶液模型成功地建立了活性炭吸附剂的吸附等温线。用Langmuir模型和空位溶液模型对MS5A吸附剂的吸附等温线进行了较好的关联。对二元组分体系（Kr-Xe、Kr-N-2体系）进行了吸附实验，结果表明，Xe的共存极大地抑制了Kr的吸附，大量N-2的共存也抑制了Kr的吸附，空白溶液模型无需参数拟合即可很好地再现了二元组分体系在活性炭吸附剂上的吸附平衡。理想吸附溶液模型无需参数拟合，可以较好地预测MS5A吸附剂上的二元吸附平衡。该吸附体系采用空位溶液模型需要优化参数，但优化后的参数能很好地再现二元吸附平衡。
The adsorption equilibria of Kr: Xe and N-2, which are constituents of the off-gas from nuclear reprocessing processes, on representative adsorbents (Molecular Sieve 5A (MS5A) and activated charcoal) were studied. Adsorption experiments were conducted in the temperature range of 77 to 323K using a packed bed column. The adsorption isotherms for the activated charcoal adsorbent were successfully correlated by the vacancy solution model. The adsorption isotherms for the MS5A adsorbent were properly correlated by the Langmuir model and the vacancy solution model. The adsorption experiments for the binary component systems (Kr-Xe, Kr-N-2 systems) were also performed, and the results suggest that the coexistence of Xe greatly inhibits the adsorption of Kr. The coexistence of large amounts of N-2 was also found to inhibit the adsorption of Kr. The experimental results for the adsorption equilibrium of binary component systems on the activated charcoal adsorbent were well reproduced by the vacancy solution model without parameter fitting. The binary adsorption equilibrium on the MS5A adsorbent is rather well predicted by the ideal adsorbed solution model without parameter fitting. The use of the vacancy solution model for this adsorption system requires the optimization of parameters, but the binary adsorption equilibrium is well reproduced with the optimized parameters.