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Development and characteristics analysis of salt-hydrate based composite sorbent for low-grade thermochemical energy storage

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU138577" target="_blank" >RIV/00216305:26210/20:PU138577 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.sciencedirect.com/science/article/abs/pii/S0960148120307606?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0960148120307606?via%3Dihub</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.renene.2020.05.062" target="_blank" >10.1016/j.renene.2020.05.062</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Development and characteristics analysis of salt-hydrate based composite sorbent for low-grade thermochemical energy storage

  • Original language description

    Salt-hydrate based thermochemical energy storage is currently a momentous technique utilized for longterm energy storage due to the reversible gas-solid reaction under low-temperature. Among available salt candidates, LiOH center dot H2O is a promising thermochemical material owing to its high heat storage density of 1400 kJ/kg and low charging temperature. The expanded graphite (EG) is selected as a host matrix owing to its excellent thermal conductivity and abundant microstructure, which can promote the heat and mass transfer. This work focuses on the thermochemical performances of the form-stable LiOH$H2O/ EG composite sorbents. Five samples were being synthesized with EG contents of 0, 5, 8, 12 and 15 wt%. These porous sorbents are characterized to understand the microstructure and thermophysical properties. Considering the comprehensive effect of thermal conductivity and storage density, as well as the adsorption kinetics, the 8 wt% EG-doped sample is the most favourable sorbent, which possesses the thermal conductivity of 6.92 W/(m K) and energy density of 1120 kJ/kg. The cyclability results also reveal the energy capacity of this composite maintains similar to 90% of the original after ten consecutive heat charging (dehydration) and discharging (hydration), suggesting good stability. Additionally, the active energy of 2.58 x 10(9) s(-1) and pre-exponential factor of 59.5 kJ/mol for the sorbent is derived. Finally, the thermal power of 123 Wand thermal efficiency of 83.6% are achieved for the storage unit in simulation. All these results further confirmed the feasibility of the developed composite sorbent in low-grade heat storage. (C) 2020 Elsevier Ltd. All rights reserved.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    20704 - Energy and fuels

Result continuities

  • Project

    <a href="/en/project/EF15_003%2F0000456" target="_blank" >EF15_003/0000456: Sustainable Process Integration Laboratory (SPIL)</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    RENEWABLE ENERGY

  • ISSN

    0960-1481

  • e-ISSN

  • Volume of the periodical

    neuveden

  • Issue of the periodical within the volume

    157

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    21

  • Pages from-to

    920-940

  • UT code for WoS article

    000541747100075

  • EID of the result in the Scopus database

    2-s2.0-85085349629