Thermochemical energy storage system development utilising limestone
| Autor: | Mark Paskevicius, Craig E. Buckley, Terry D. Humphries, Kasper T. Møller, Amanda Berger |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Carbonation Scale-up Energy storage setups Calcium-looping alternative Energy storage law.invention Chemical engineering law medicine Calcination business.industry Thermochemical energy storage Fossil fuel General Medicine Limestone Thermal energy storage prototype Renewable energy TP155-156 business Gas compressor Thermal Battery Activated carbon medicine.drug |
| Zdroj: | Chemical Engineering Journal Advances, Vol 8, Iss, Pp 100168-(2021) Møller, K T, Humphries, T D, Berger, A, Paskevicius, M & Buckley, C 2021, ' Thermochemical energy storage system development utilising limestone ', Chemical Engineering Journal Advances, vol. 8, 100168 . https://doi.org/10.1016/j.ceja.2021.100168 |
| ISSN: | 2666-8211 |
| Popis: | For renewable energy sources to replace fossil fuels, large scale energy storage is required and thermal batteries have been identified as a commercially viable option. In this study, a 3.2 kg prototype (0.82 kWh th) of the limestone-based CaCO 3-Al 2O 3 (16.7 wt%) thermochemical energy storage system was investigated near 900 °C in three different configurations: (i) CaCO 3 was thermally cycled between 850 °C during carbonation and 950 °C during calcination whilst activated carbon was utilised as a CO 2 gas storage material. (ii) The CaCO 3 temperature was kept constant at 900 °C while utilising the activated carbon gas storage method to drive the thermochemical reaction. (iii) A mechanical gas compressor was used to compress CO 2 into volumetric gas bottles to achieve a significant under/overpressure upon calcination/carbonation, i.e. ≤ 0.8 bar and > 5 bar, respectively, compared to the ∼1 bar thermodynamic equilibrium pressure at 900 °C. Scenarios (i) and (iii) showed a 64% energy capacity retention at the end of the 10th cycle. The decrease in capacity was partly assigned to the formation of mayenite, Ca 12Al 14O 33, and thus the absence of the beneficial properties of the expected Ca 5Al 6O 14 while sintering was also observed. The 316L stainless-steel reactor was investigated in regards to corrosion issues after being under CO 2 atmosphere above 850 °C for approximately 1400 h, and showed no significant degradation. This study illustrates the potential for industrial scale up of catalysed CaCO 3 as a thermal battery and provides a viable alternative to the calcium-looping process. |
| Databáze: | OpenAIRE |
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