CORRELATION OF SOME GAS ADSORPTION DATA EXTENDING TO LOW PRESSURES + SUPERCRITICAL TEMPERATURES
CORRELATION OF SOME GAS ADSORPTION DATA EXTENDING TO LOW PRESSURES + SUPERCRITICAL TEMPERATURES
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DOI：
10.1021/i160011a009
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发表时间：
1964-01-01
期刊：
影响因子：
--
通讯作者：
MANES, M
中科院分区：
文献类型：
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作者：
GRANT, RJ;MANES, M
在195.8 ~ 78℃的温度范围内，测定了氮气、甲烷、氩气、氢气和氖气在两种活性炭和硅胶上的吸附等温线。结果数据和已发表的数据通过修正的polanyi型相关进行了关联。在低压（至10-3托）或超临界温度下关联数据没有发现困难。此外，该方法将两篇已发表的文章中的数据进行了关联，其中报告了相关性困难。修正后的polanyi型关联似乎具有广泛的适用性，并建议在没有直接数据的情况下进行吸附系统的初步设计。尽管为了研究吸附的热力学和确定吸附剂的表面积和结构，在低至1mmhg （torr）的压力下，对普通吸附剂对永久性气体的低温吸附进行了广泛的研究，文献中包含相对较少的参考文献，这些气体在较低的压力区域中吸附，对应于百万分之几的浓度，这是气体净化应用最感兴趣的区域。这也提出了在这一地区应用哪种理论的问题。
Adsorption isotherms of nitrogen, methane, argon, hydrogen, and neon in the—195.8 to—78 C. tem-perature range have been determined on two activated carbons and a silica gel. The resulting data and published data have been correlated by a modified Polanyi-type correlation. No difficulty was found in correlating data at low pressures (to 10-3 torr) or at supercritical temperatures. Moreover, the method correlated data from each of two publishedarticles in which correlation difficulties were reported. The modified Polanyi-type correlation appears to be widely applicable and is suggested for the preliminary design of adsorption systems in the absence of direct data.A lthough the low-temperature adsorption of permanent gases on common adsorbents has been studied extensively at pressures down to 1 mm. of Hg (torr), both for investigating the thermodynamicsof adsorption and for determining surface areas and structure of adsorbents, the literature contains rela-tively few references to adsorption of such gases in the lower pressure regioncorresponding to concentrations of a few parts per million which is the region of greatest interest for gas purification applications. It also raises thequestion of which theory to apply in this region.