| Full text | |
| Author(s): |
Total Authors: 4
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| Affiliation: | [1] Univ Fed Sao Carlos, Grad Program Mat Sci & Engn PPGCEM, Rod Washington Luiz, Km 235, SP-310, BR-13565905 Sao Carlos, SP - Brazil
[2] Fed Univ Sao Carlos DEMa UFSCar, Dept Mat Engn, Rod Washington Luiz, Km 235, SP-310, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 2
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| Document type: | Journal article |
| Source: | INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 47, n. 1, p. 470-489, JAN 1 2022. |
| Web of Science Citations: | 0 |
| Abstract | |
In recent works, it was noticed that Mg/MgH2 mixed with additives by high energy ball milling allows temperature reductions of H-2 absorption/desorption without necessarily changing thermodynamic properties. Thus, the objective of this work was to investigate which additives, mixed in low fractions with MgH2 powder would act as efficient hydrogen absorption/desorption catalysts at low temperatures, mainly at room temperature (RT). MgH2 mixtures with 2 mol% additives (Fe, Nb2O5 , TiAl and TiFe) were prepared by high energy reactive ball milling (RM). MgH2-TiFe mixture showed the best results, both during desorption at 330 degrees C and absorption at RT. The hydrogen absorption was approximate to 2.67 wt% H-2 in 1 h and approximate to 4.44 wt% H-2 in 16 h (40% and 67% of maximum theoretical capacity, respectively). The MgH2 -TiFe superior performance was attributed to the hydrogen attraction by the created high energy interfaces and strong TiFe catalytic action facilitating the H-2 flow during Mg/MgH2 reactions. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU) | |
| FAPESP's process: | 13/05987-8 - Processing and characterization of amorphous, metastable and nano-structured metallic alloys |
| Grantee: | Claudio Shyinti Kiminami |
| Support Opportunities: | Research Projects - Thematic Grants |