A synthetic method has been used to measure the bubble-point pressures of carbon dioxide (CO 2 ) and methane (CH 4 ), for a temperature range of 303.15−363.15 K and for pressures up to 14 MPa, in the following ionic liquids:and methyltrioctylammonium bis(trifluoromethylsulfonyl)imide [toa][Tf 2 N]. The solubility of CH 4 on mole fraction basis is a factor of 10 lower than that of CO 2 at similar conditions. Henry constants of CO 2 and CH 4 in all the ionic liquid (IL) systems are presented, from which the ideal CO 2 /CH 4 selectivities are obtained. The ideal CO 2 /CH 4 selectivities of the investigated ILs are in the range of the conventional solvents like Selexol, Purisol, Rectisol, Fluor Solvent, and sulfolane. The ideal CO 2 /CH 4 selectivity decreases dramatically with increasing temperature and increasing IL molecular weight. Furthermore, the experimental data has been modeled accurately with the Peng−Robinson equation of state in combination with van der Waals mixing rules.

A comparative assessment of several vibration based statistical time series methods for Structural Health Monitoring (SHM) is presented via their application to an aircraft scale skeleton structure. A concise overview of some of the main scalar and vector time series methods is provided, encompassing both non–parametric and parametric as well as response–only and excitation–response schemes. Damage detection and identification, collectively referred to as damage diagnosis, is based on single and multiple vibration response signals. The methods’ effectiveness is assessed via multiple experiments under various damage scenarios (loosened bolts). The results of the study confirm the global damage detection capability and effectiveness of scalar and vector statistical time series methods for SHM.

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Extensive global research efforts have focused on the exploitation of graphene for enhanced energy storage. Novel graphene-based composite material electrodes have been developed, in many cases with reports of outstanding performance. However, the development of these composites involve extremely complex and costly procedures/methods whose scalability and eventual commercial exploitation is extremely hard [1]. Within the present activity the use of graphene nanotechnology is exploited to manufacture electrodes for supercapacitors. The goal however is to achieve electrodes with increased specific energy density (compared to the currently commercially available products) using proven and simple manufacturing procedures that can easily be scaled-up and offer competitive products. The roadmap was developed under the framework of European Space Agency highlighting the main advantages brought up from this technology. The activity is separated in three parallel routes; the development and test planning of smallscale production of graphene based materials via the tape casting technology, the establishment of a reliable and low cost industrial production process (scale-up) for these materials and the development and testing of an energy storage demonstrator that shall incorporate the novel electrodes and exhibit their favorable characteristics in energy storage applications for use in space.