Heat Release Kinetics upon Water Vapor Sorption Using Cation-Exchanged Zeolites and Prussian Blue Analogues as Adsorbents: Application to Short-Term Low-Temperature Thermochemical Storage of Energy

Salma Benzaria, Ekaterina Mamontova, Yannick Guari, Joulia Larionova, Jérôme Long, Philippe Trens, Fabrice Salles and Jerzy Zajac
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Salma Benzaria: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Ekaterina Mamontova: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Yannick Guari: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Joulia Larionova: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Jérôme Long: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Philippe Trens: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Fabrice Salles: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France
Jerzy Zajac: Institut Charles Gerhardt (ICGM), Univ Montpellier, CNRS, ENSCM, 34090 Montpellier, France

Energies, 2021, vol. 14, issue 12, 1-18

Abstract: In view of potential uses in short-term thermochemical heat storage by sorption of water vapor, the capacity to release a sufficient heat amount at the appropriate rate of a Prussian blue analogue (PBA) containing hexacyanocobaltate vacancies has been compared with those of 13X type zeolites possessing Na + , Ce 3+ , Ce 4+ , or Tb 3+ extra-framework compensating cations. The extended structural and surface characterization demonstrated good reproducibility of the preparation procedures performed on a 10-g scale. The adsorbents were tested under dynamic conditions of gas flow with the aid of either a gas flow calorimeter (120 mL h −1 helium flow) to measure the amount and rate of the integral heat release or a laboratory-scale test rig (15,000 to 22,800 mL h −1 nitrogen flow) to monitor the outlet temperature of nitrogen heated by adsorption. For a regeneration temperature of 353 K and a partial H 2 O pressure of 2.8 kPa in helium, the PBA sample yielded an integral heat ranging between 900 and 1020 kJ kg −1 with a very slow heat release lasting for even 12–14 h. The zeolite-based materials generated between 350 and 950 kJ kg −1 more rapidly (up to 6–7 h), depending on the nature and the content of compensating cations, as well as on the dehydration state achieved during regeneration. With the laboratory-scale test rig, the efficiency of heat extraction by convection was about 65% for Na-13X and only 38% for PBA, and it diminished with decreasing flow rate.

Keywords: short-term thermochemical heat storage; water vapor adsorption; porous adsorbents; cation-exchanged zeolites; Prussian blue analogues; integral heat of adsorption; heat release kinetics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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