Huge pore volumes

The huge pore volume, surface area, and compositional flexibility of mesoporous materials can be exploited for adsorption (and retention) of a wide range of liquids or gases. Here there is a wide range of possible uses, ranging from improving the efficiency of gas (e.g., methane) storage to selective adsorption of heavy metals. For the latter, the mesoporous material has to be functionalized with appropriate adsorption sites. 

Gases that are condensable at 77K are trapped by cryocondensation . ( Cryosorption is instead the trapping of gas with a lower melting temperature inside the pores of the molecular sieve that has a huge surface/volume ratio, typically about 700m2/cm3.)... 

Although the presence of cements along fractures is indicative of water flow, precipitation does not necessarily occur by advection, but rather by ionic diffusion from the host sediments. Advective cementation requires the circulation of huge water volumes. For each pore volume of cement, 10 to 10 water volumes are required (Bathurst, 1975 Wood, 1986 Sharp et al., 1988). The distinction between cements formed by diffusive and advective... 

The observations from these studio paint out the tmportamx of volume in pares having about the size as SOC molecules, and the ability of some DOM molecules to iraetfere with the access of SOC to that pare size region. Several studies that tested DOM adsorption from various natural waters with activated carbon fibers indicated that DOM molecules are too huge to enter in pores <1 nm [43,44,109]. Some unpublished data obtained in the author s laboratory finther confirmed that this observation is valid at lower pH values (i.e, 5,5) wliich poomote DOM adsorption and for DOMs both in natural waters and after conventional treatment processes. Thereibre, it appears that ... 

However, as discussed in the paragraph below that equation, liquid water formation in hydrophobic CLs pores is virtually impossible, requiring huge liquid excess pressures. Therefore, during operation, the saturation s could increase only in secondary pores if they are hydrophilic. The volume fraction of hydrophobic pores will determine whether the CL performance depends significantly on the liquid water saturation. 

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