The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems
Cyclic stability is a key factor in the design of thermochemical heat storage systems. Because carbon dioxide (CO2) may react with heat storage materials and lead to a decrease in energy storage efficiency, the effect of CO2 on Ca(OH)2/CaO and Mg(OH)2/MgO systems is investigated in this study. The e...
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ftrepec:oai:RePEc:eee:energy:v:124:y:2017:i:c:p:114-123 2024-04-14T08:10:18+00:00 The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems Yan, J. Zhao, C.Y. Pan, Z.H. http://www.sciencedirect.com/science/article/pii/S0360544217302086 unknown http://www.sciencedirect.com/science/article/pii/S0360544217302086 article ftrepec 2024-03-19T10:38:19Z Cyclic stability is a key factor in the design of thermochemical heat storage systems. Because carbon dioxide (CO2) may react with heat storage materials and lead to a decrease in energy storage efficiency, the effect of CO2 on Ca(OH)2/CaO and Mg(OH)2/MgO systems is investigated in this study. The experimental results show that CO2 reacts with CaO in the water vapor that appears during the heat release process. Therefore, in the design of Ca(OH)2/CaO systems, CO2 should be cleared from the system. The results from Mg(OH)2/MgO systems show that CO2 only slightly reacts with MgO and Mg(OH)2 during heat storage and release processes. This study indicates that carbonic acid (H2CO3) could easily react with CaO/Ca(OH)2 to form CaCO3 during heat release processes. Generally, the remaining CO2 reduces the reversibility of Ca(OH)2/CaO systems but has only a slight influence on Mg(OH)2/MgO systems. In addition, the experimental results show that carbonate shell does not exist in rehydration for both of the CaO/MgO samples, but the influence of CO2 on the entire process increases after each cycle. Thermochemical heat storage; Cyclic stability; Carbon dioxide (CO2); Alkaline-earth metal oxide; Article in Journal/Newspaper Carbonic acid RePEc (Research Papers in Economics) |
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RePEc (Research Papers in Economics) |
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Cyclic stability is a key factor in the design of thermochemical heat storage systems. Because carbon dioxide (CO2) may react with heat storage materials and lead to a decrease in energy storage efficiency, the effect of CO2 on Ca(OH)2/CaO and Mg(OH)2/MgO systems is investigated in this study. The experimental results show that CO2 reacts with CaO in the water vapor that appears during the heat release process. Therefore, in the design of Ca(OH)2/CaO systems, CO2 should be cleared from the system. The results from Mg(OH)2/MgO systems show that CO2 only slightly reacts with MgO and Mg(OH)2 during heat storage and release processes. This study indicates that carbonic acid (H2CO3) could easily react with CaO/Ca(OH)2 to form CaCO3 during heat release processes. Generally, the remaining CO2 reduces the reversibility of Ca(OH)2/CaO systems but has only a slight influence on Mg(OH)2/MgO systems. In addition, the experimental results show that carbonate shell does not exist in rehydration for both of the CaO/MgO samples, but the influence of CO2 on the entire process increases after each cycle. Thermochemical heat storage; Cyclic stability; Carbon dioxide (CO2); Alkaline-earth metal oxide; |
format |
Article in Journal/Newspaper |
author |
Yan, J. Zhao, C.Y. Pan, Z.H. |
spellingShingle |
Yan, J. Zhao, C.Y. Pan, Z.H. The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems |
author_facet |
Yan, J. Zhao, C.Y. Pan, Z.H. |
author_sort |
Yan, J. |
title |
The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems |
title_short |
The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems |
title_full |
The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems |
title_fullStr |
The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems |
title_full_unstemmed |
The effect of CO2 on Ca(OH)2 and Mg(OH)2 thermochemical heat storage systems |
title_sort |
effect of co2 on ca(oh)2 and mg(oh)2 thermochemical heat storage systems |
url |
http://www.sciencedirect.com/science/article/pii/S0360544217302086 |
genre |
Carbonic acid |
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Carbonic acid |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0360544217302086 |
_version_ |
1796307813806374912 |