Isotherms for Water Adsorption on Molecular Sieve 3A: Influence of Cation Composition
Isotherms for Water Adsorption on Molecular Sieve 3A: Influence of Cation Composition
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DOI：
10.1021/acs.iecr.5b01411
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发表时间：
2015-07
影响因子：
4.2
通讯作者：
Ronghong Lin;Austin P. Ladshaw;Yue Nan;Jiuxu Liu;S. Yiacoumi;C. Tsouris;D. DePaoli;L. Tavlarides
中科院分区：
文献类型：
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作者：
Ronghong Lin;Austin P. Ladshaw;Yue Nan;Jiuxu Liu;S. Yiacoumi;C. Tsouris;D. DePaoli;L. Tavlarides
这项工作是我们不断努力解决与从废核燃料后处理设施产生的废气中去除氚化水相关的工程问题的一部分。在当前的研究中，研究了水在分子筛3A珠上的吸附平衡。通过连续流动吸附系统在 298、313、333 和 353 K 测量水在 UOP 分子筛 3A 上的吸附等温线。通过广义统计热力学吸附 (GSTA) 等温线模型分析收集的实验数据。这种特殊类型的分子筛 3A 的 K+/Na+ 摩尔比为~4:6。我们的结果表明，GSTA 等温线模型可以很好地描述水在 3A 分子筛上吸附的平衡行为。当前实验数据的最佳参数数量被确定为一组四个平衡参数。该结果表明吸附剂晶体包含四个能量上不同的吸附位点。此外，它还...
This work is part of our continuing efforts to address engineering issues related to the removal of tritiated water from off-gases produced in used nuclear fuel reprocessing facilities. In the current study, adsorption equilibrium of water on molecular sieve 3A beads was investigated. Adsorption isotherms for water on the UOP molecular sieve 3A were measured by a continuous-flow adsorption system at 298, 313, 333, and 353 K. Experimental data collected were analyzed by the Generalized Statistical Thermodynamic Adsorption (GSTA) isotherm model. The K+/Na+ molar ratio of this particular type of molecular sieve 3A was ∼4:6. Our results showed that the GSTA isotherm model worked very well to describe the equilibrium behavior of water adsorption on molecular sieve 3A. The optimum number of parameters for the current experimental data was determined to be a set of four equilibrium parameters. This result suggests that the adsorbent crystals contain four energetically distinct adsorption sites. In addition, it w...