Talks and Poster Presentations (with Proceedings-Entry):
C. Knoll, D. Müller, M. Deutsch, C. Jordan, M. Harasek, A. Werner, P. Weinberger:
"Oxalate and carbonate based thermochemical energy storage materials - reaction kinetics and material optimization";
Talk: 27th International Conference on Organometallic Chemistry (ICOMC) 2016,
- 2016-07-22; in: "Book of abstracts",
The problem of excessive consumption of fossil fuels and the undesirable side effects, like global warming and pollution is one of the big issues for scientists around the world in many different fields. Thermochemical energy storage (TCES) offers the potential to be a suitable technique to save fossil energy by recovering waste energy. Additionally, any other industrial chemical process generating heat is a possible application. Just as an example for energy conversion losses figure 1 shows the global electricity system losses from power plants towards the consumer. Thermochemical energy storage, based on reversible chemical reactions is an auspicious storage method, because particle related storage densities are very high, losses during storage period are negligible and new value-added product chains can be created concerning new energy distribution systems based on waste heat recovery or increased use of regenerative (solar) sources. Our studies focus on solid-gas reactions, on the one hand of alkali and earth alkali carbonates, with water and carbon dioxide as reactive component. On the other hand we found hydration and dehydration of alkali and earth alkali oxalates as very promising reactions with respect to their excellent cycle stability in the low temperature regime below 200°C, which is difficult to address with other industrial techniques like direct conversion to hot steam.
Simultaneous thermal analysis provides data on yield, temperature and pressure dependence and form the basis for kinetic modelling.
The presentation will give a detailed insight into TCES-materials characterization, optimization and kinetics, as well as our findings regarding the cycle stability of TCES-materials.
thermochemical energy storage materials
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