Effect of metalic and metal-oxide catalysts on LiAlH4 decomposition
Аутори
Babić, BojanaPrvulović, Milica
Rmuš, Jelena
Mitrović Rajić, Anđela
Milošević Govedarović, Sanja
Milanović, Igor
Kurko, Sandra
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Metal and complex light hydrides are the best fitted materials for hydrogen storage within the concept of hydrogen based economy [1]. They meet the basic application requirements: low-cost, safety and they are environmentally friendly. Beside their benefits, as relatively stable compounds, these materials exhibit also some undesirable properties like sluggish kinetics and high temperature of hydrogen desorption. LiAlH4 has emerged as a potential material for solid-state hydrogen storage because of its high hydrogen gravimetric capacity (10.5 wt%). It decomposes in three steps, according to the reactions [2]: 3LiAlH4 → Li3AlH6 + 2Al + H2 (R1) Li3AlH6 → 3LiH + Al + 3/2H2 (R2) 3LiH+3Al → 3LiAl + 3/2H2 (R3) The temperature of the first reaction is between 150-175°C, of the second between 180-220°C and the third between 400420°C. The first two reactions (R1 and R2) are very important from the hydrogen storage point of vi...ew: (i) both take place at a reasonable low temperatures and (ii) overall sum of theirs gravimetric hydrogen capacity is 7.8 wt.%, so the reactions (R1) and (R2) are accessible for practical hydrogen storage. However, the slow dehydrogenation kinetics and irreversibility under moderate condition hinder its imminent application. Particle refinement and catalyst or additive introduction by mechanical milling led to the significant improvement of LiAlH4 hydrogen storage properties [2]. However, during the milling process, the temperature in the milling chamber can significantly increase reaching the temperature of R1 or even R2 leading to the degradation of hydride, change in the hydrogen desorption mechanism (figure 1) and decrease in the hydrogen storage capacity of material [3]. So, in this work the impact of metallic (V, Mn an Cr) and metal oxide (Fe2O3 and Nb2O5) additives on the LiAlH4 hydrogen desorption properties with the emphasis on the hydride degradation process during milling and a consequent hydrogen desorption reaction mechanism was studied. The aim was to improve the hydrogen desorption kinetics without hydrogen capacity deterioration.
Извор:
mESC-IS 2022 : 6th International Symposium on Materials for Energy Storage and Conversion : Book of abstracts, 2022, 23-23Издавач:
- Split : University of Split
Напомена:
- 6th International Symposium on Materials for Energy Storage and Conversion : July 5-8, Bol, island of Brač, Croatia, 2022.
Колекције
Институција/група
VinčaTY - CONF AU - Babić, Bojana AU - Prvulović, Milica AU - Rmuš, Jelena AU - Mitrović Rajić, Anđela AU - Milošević Govedarović, Sanja AU - Milanović, Igor AU - Kurko, Sandra PY - 2022 UR - https://vinar.vin.bg.ac.rs/handle/123456789/12765 AB - Metal and complex light hydrides are the best fitted materials for hydrogen storage within the concept of hydrogen based economy [1]. They meet the basic application requirements: low-cost, safety and they are environmentally friendly. Beside their benefits, as relatively stable compounds, these materials exhibit also some undesirable properties like sluggish kinetics and high temperature of hydrogen desorption. LiAlH4 has emerged as a potential material for solid-state hydrogen storage because of its high hydrogen gravimetric capacity (10.5 wt%). It decomposes in three steps, according to the reactions [2]: 3LiAlH4 → Li3AlH6 + 2Al + H2 (R1) Li3AlH6 → 3LiH + Al + 3/2H2 (R2) 3LiH+3Al → 3LiAl + 3/2H2 (R3) The temperature of the first reaction is between 150-175°C, of the second between 180-220°C and the third between 400420°C. The first two reactions (R1 and R2) are very important from the hydrogen storage point of view: (i) both take place at a reasonable low temperatures and (ii) overall sum of theirs gravimetric hydrogen capacity is 7.8 wt.%, so the reactions (R1) and (R2) are accessible for practical hydrogen storage. However, the slow dehydrogenation kinetics and irreversibility under moderate condition hinder its imminent application. Particle refinement and catalyst or additive introduction by mechanical milling led to the significant improvement of LiAlH4 hydrogen storage properties [2]. However, during the milling process, the temperature in the milling chamber can significantly increase reaching the temperature of R1 or even R2 leading to the degradation of hydride, change in the hydrogen desorption mechanism (figure 1) and decrease in the hydrogen storage capacity of material [3]. So, in this work the impact of metallic (V, Mn an Cr) and metal oxide (Fe2O3 and Nb2O5) additives on the LiAlH4 hydrogen desorption properties with the emphasis on the hydride degradation process during milling and a consequent hydrogen desorption reaction mechanism was studied. The aim was to improve the hydrogen desorption kinetics without hydrogen capacity deterioration. PB - Split : University of Split C3 - mESC-IS 2022 : 6th International Symposium on Materials for Energy Storage and Conversion : Book of abstracts T1 - Effect of metalic and metal-oxide catalysts on LiAlH4 decomposition SP - 23 EP - 23 UR - https://hdl.handle.net/21.15107/rcub_vinar_12765 ER -
@conference{ author = "Babić, Bojana and Prvulović, Milica and Rmuš, Jelena and Mitrović Rajić, Anđela and Milošević Govedarović, Sanja and Milanović, Igor and Kurko, Sandra", year = "2022", abstract = "Metal and complex light hydrides are the best fitted materials for hydrogen storage within the concept of hydrogen based economy [1]. They meet the basic application requirements: low-cost, safety and they are environmentally friendly. Beside their benefits, as relatively stable compounds, these materials exhibit also some undesirable properties like sluggish kinetics and high temperature of hydrogen desorption. LiAlH4 has emerged as a potential material for solid-state hydrogen storage because of its high hydrogen gravimetric capacity (10.5 wt%). It decomposes in three steps, according to the reactions [2]: 3LiAlH4 → Li3AlH6 + 2Al + H2 (R1) Li3AlH6 → 3LiH + Al + 3/2H2 (R2) 3LiH+3Al → 3LiAl + 3/2H2 (R3) The temperature of the first reaction is between 150-175°C, of the second between 180-220°C and the third between 400420°C. The first two reactions (R1 and R2) are very important from the hydrogen storage point of view: (i) both take place at a reasonable low temperatures and (ii) overall sum of theirs gravimetric hydrogen capacity is 7.8 wt.%, so the reactions (R1) and (R2) are accessible for practical hydrogen storage. However, the slow dehydrogenation kinetics and irreversibility under moderate condition hinder its imminent application. Particle refinement and catalyst or additive introduction by mechanical milling led to the significant improvement of LiAlH4 hydrogen storage properties [2]. However, during the milling process, the temperature in the milling chamber can significantly increase reaching the temperature of R1 or even R2 leading to the degradation of hydride, change in the hydrogen desorption mechanism (figure 1) and decrease in the hydrogen storage capacity of material [3]. So, in this work the impact of metallic (V, Mn an Cr) and metal oxide (Fe2O3 and Nb2O5) additives on the LiAlH4 hydrogen desorption properties with the emphasis on the hydride degradation process during milling and a consequent hydrogen desorption reaction mechanism was studied. The aim was to improve the hydrogen desorption kinetics without hydrogen capacity deterioration.", publisher = "Split : University of Split", journal = "mESC-IS 2022 : 6th International Symposium on Materials for Energy Storage and Conversion : Book of abstracts", title = "Effect of metalic and metal-oxide catalysts on LiAlH4 decomposition", pages = "23-23", url = "https://hdl.handle.net/21.15107/rcub_vinar_12765" }
Babić, B., Prvulović, M., Rmuš, J., Mitrović Rajić, A., Milošević Govedarović, S., Milanović, I.,& Kurko, S.. (2022). Effect of metalic and metal-oxide catalysts on LiAlH4 decomposition. in mESC-IS 2022 : 6th International Symposium on Materials for Energy Storage and Conversion : Book of abstracts Split : University of Split., 23-23. https://hdl.handle.net/21.15107/rcub_vinar_12765
Babić B, Prvulović M, Rmuš J, Mitrović Rajić A, Milošević Govedarović S, Milanović I, Kurko S. Effect of metalic and metal-oxide catalysts on LiAlH4 decomposition. in mESC-IS 2022 : 6th International Symposium on Materials for Energy Storage and Conversion : Book of abstracts. 2022;:23-23. https://hdl.handle.net/21.15107/rcub_vinar_12765 .
Babić, Bojana, Prvulović, Milica, Rmuš, Jelena, Mitrović Rajić, Anđela, Milošević Govedarović, Sanja, Milanović, Igor, Kurko, Sandra, "Effect of metalic and metal-oxide catalysts on LiAlH4 decomposition" in mESC-IS 2022 : 6th International Symposium on Materials for Energy Storage and Conversion : Book of abstracts (2022):23-23, https://hdl.handle.net/21.15107/rcub_vinar_12765 .