Dehydrogenation and low-pressure hydrogenation properties of NaAlH4 confined in mesoporous carbon black for hydrogen storage

卷:48

Article

关键词: SODIUM ALANATE;    KINETICS;    NANOPARTICLES;    DESORPTION;    RELEASE;    SIZE;   

DOI  :  10.1016/j.ijhydene.2023.01.358

来源: SCIE

【 摘 要 】

For hydrogen to be successfully used as an energy carrier in a new renewable energy driven economy, more efficient hydrogen storage technologies have to be found. Solid-state hydrogen storage in complex metal hydrides, such as sodium alanate (NaAlH4), is a well -researched candidate for this application. A series of NaAlH4/mesoporous carbon black composites, with high NaAlH4 content (50-90 wt%), prepared via ball milling have demonstrated significantly lower dehydrogenation temperatures with intense dehydro-genation starting at-373 K compared to bulk alanate's & GE; 456 K. Dehydrogenation/hydro-genation cycling experiments have demonstrated partial hydrogenation at 6 MPa H2 and 423 K. The cycling experiments combined with temperature-programmed dehydrogena-tion and powder X-ray diffraction have given insight into the fundamental processes driving the H2 release and uptake in the NaAlH4/carbon composites. It is established that most of the hydrogenation behavior can be attributed to the Na3AlH6 4 NaH transition.& COPY; 2023 The Authors. Published by Elsevier Ltd on behalf of Hydrogen Energy Publications LLC. This is an open access article under the CC BY license (http://creativecommons.org/ licenses/by/4.0/).

【 授权许可】

Free