Storage gravimetric method

Isotherm measurements of methane at 298 K can be made either by a gravimetric method using a high pressure microbalance [31], or by using a volumetric method [32]. Both of these methods require correction for the nonideality of methane, but both methods result in the same isotherm for any specific adsorbent [20]. The volumetric method can also be used for measurement of total storage. Here it is not necessary to differentiate between the adsorbed phase and that remaining in the gas phase in void space and macropore volume, but simply to evaluate the total amount of methane in the adsorbent filled vessel. To obtain the maximum storage capacity for the adsorbent, it would be necessary to optimally pack the vessel. 

Measurements of fhe solubilify of gases in ILs are increasingly important as researchers explore the use of ILs for gas separation and gas storage, as well as a solvent media for reacfions involving permanent gases. Here we present several different methods that have been used to obtain these measurements. These include traditional synthetic and pressure drop methods, as well as gravimetric methods that are particularly well-suited for the measurement of gases in nonvolatile liquids. 

Figure 15. Method of conventional OSC measurement with TO. Conventional OSC was evaluated as the amount of 02 storage and release on a second time scale by a thermo gravimetric analysis...

Fig. 6.2 The six basic hydrogen storage methods and phenomena. The gravimetric density prr, the volumetric density pv, the working temperature T and pressure p are listed. RT stands for room temperature (25°C). From top to bottom compressed gas (molecular H2) in a lightweight composite cylinder (tensile strength of the material is 2000 MPa) liquid hydrogen (molecular H2), continuous loss of a few percent per day of hydrogen at RT physisorption...

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