Storage of gases at room temperature by adsorption at high pressure
Storage of gases at room temperature by adsorption at high pressure
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DOI：
10.1016/1359-4311(95)00018-6
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发表时间：
1996-05
影响因子：
6.4
通讯作者：
P. Malbrunot;D. Vidal;J. Vermesse
中科院分区：
文献类型：
--
作者：
P. Malbrunot;D. Vidal;J. Vermesse
在室温下通过吸附储存气体不仅取决于吸附剂的吸附能力，而且取决于其体积密度和其氦密度。为了确定更好的吸附条件，我们进行了基于基本方面的系统研究。我们测量了大气压范围内流动气体的吸附等温线，同时用蒙特-卡罗方法模拟了Lennard-Jones气体在平面和微孔界面上的吸附。这两种不同方法的结果是一致的所有气体的吸附等温线显示没有饱和的吸附在高压下，但表现出最大值在中等压力和最小值，然后在较高的压力下轻的再增加。气体吸附的这种行为似乎主要受固-气相互作用的控制，微孔结构仅在吸附剂比表面积增加的水平上起作用。结合这些结果和我们自己的数据上的体积和氦密度的活性炭，以及硅胶和沸石A和X，我们已经确定，作为一个函数的压力，相应的变化的“比存储容量”的甲烷，并在不同的固态纹理，几种吸附剂。
The storage of gases by adsorption at room temperature depends not only on the adsorption capacity of the adsorbent but also on its bulk density and on its helium density. With the aim of determining better adsorption conditions, we have undertaken systematic investigations based on fundamental aspects. We have measured the adsorption isotherms of current gases in a large pressure range and, at the same time, we have obtained by Monte-Carlo simulations the adsorption of Lennard-Jones gases on plane and microporous interfaces. Results of these two different approaches are in agreement adsorption isotherms of all the gases reveal no saturation of adsorption at high pressure but exhibit a maximum at moderate pressure and a minimum followed by a light reincrease at higher pressures. Such behaviour of the adsorption of gases appears to be mainly governed by solid-gas interaction, the microporous structure contributing only at the level of an increase of the specific area of the adsorbent. Combining these results and our own data on bulk and helium densities of activated carbons, as well as silica-gel and zeolites A and X, we have determined, as a function of pressure, the corresponding variation of the ‘specific storage capacity’ of methane and that, in different solid-state textures, of several adsorbents.