Work

Binder-free K2CO3 granules for thermochemical heat storage

Year: 2024

Type: conference-paper

Abstract: Thermochemical heat storage systems encounter challenges such as agglomeration within the reactor bed, which limits gas molecule movement and diminishes overall efficiency. This study proposes an approach to mitigate this issue by producing millimeter-sized potassium carbonate (K2CO3) granules without binders using the wet granulation technique. Through 10 cycles, initial hydration loading started at 0.19 molH2O/molK2CO3 in the first cycle and increased steadily to 1.42 molH2O/molK2CO3 by the 10th cycle. During 6-hour hydration periods, the released heat from the granules significantly increased from 57 J/g to 535 J/g after 10 cycles, attributed to changes in pore volume and granule structure throughout cycling. Despite pore enlargement, the granules maintained structural integrity, highlighting their stability across repeated cycles. This study underscores the potential of binder-free potassium carbonate granules to enhance heat storage efficiency, providing valuable insights for optimizing thermochemical heat storage systems, particularly in terms of scalability for mass production of these granules.

Source: University of Twente Research Information

Authors: Salehzadeh, Delaram, ten Elshof, J.E., Mehrali, Mohammad

Language: English

Topic: Adsorption and Cooling Systems

Subfield: Mechanical Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Climate action, Responsible consumption and production, Industry, innovation and infrastructure

Open Access status: green

OpenAlex ID: W7133374713

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