Abstract
Ethane 1,2 diamineborane (EDAB) was micronized from THF solutions using Supercritical Antisolvent (SAS) process. The influence of temperature, solute concentration and carbon dioxide fraction on the final properties of EDAB particles was studied. By SAS micronization, the original prismatic EDAB particles of about 400μm with a crystallite size of 100nm were converted into microspheres of less than 2μm with a crystallite size of 50nm. This reduction in the particle and grain sizes resulted in an improvement in thermal properties. The kinetics of release of hydrogen by thermolysis at 100°C was also significantly enhanced due to the reduction in the diffusion length, reducing the time needed for the decomposition of the hydride by a factor of six. Moreover, a suppression of induction time was obtained by destabilization of the hydride after treatment. XRD and FTIR analyses showed that no chemical decomposition and no variation of the crystalline structure took place by SAS processing.
Highlights
In recent years, important efforts have been made in order to find renewable energy sources that can satisfy the current necessities
The most important limitations related to this compound are the regeneration and cyclability of the compound and the emission of some volatile byproducts as borazine, diborane or ammonia during the release of hydrogen which could be poisonous for the fuel cell [10]
Fourier Transform Infrared Spectroscopy (FT-IR) spectroscopy, X-ray diffraction, differential scanning calorimetry (DSC) analyses and the measurement of hydrogen release kinetics by thermal decomposition at 100 oC have been done in order to characterize and compare the final products obtained at different conditions in contrast to the bulk EDAB
Summary
Important efforts have been made in order to find renewable energy sources that can satisfy the current necessities. FT-IR spectroscopy, X-ray diffraction, DSC analyses and the measurement of hydrogen release kinetics by thermal decomposition at 100 oC have been done in order to characterize and compare the final products obtained at different conditions in contrast to the bulk EDAB.
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