Encapsulation of dodecane in gasification biochar for its prolonged thermal/shape stability, reliability, and ambient enthalpy storage

Dimberu G. Atinafu, Beom Yeol Yun, Sungwoong Yang, Sumin Kim

Research output: Contribution to journalArticlepeer-review

Abstract

Latent heat storage based on phase-changing materials (PCMs) is a promising technology for thermal energy storage because of its large heating enthalpy and isothermal phase-transition temperature. However, the practical applications of PCMs is highly restricted because of their intrinsically low thermal conductivity, which limits real-time energy storage/release, seepage during the phase-transition process, and expensive supporting materials. Therefore, the development of shape-stable composite PCMs by using renewable precursors, such as biomass, has received considerable research attention because of their low cost, environmental friendliness, and availability. In this study, waste biomass materials (food waste and wood waste) activated by KOH were pyrolyzed to produce biochar/biocarbon and subsequently used for organic PCM, dodecane, encapsulation. The obtained biochar exhibited a high specific surface area and pore size distribution. The biochar–dodecane composite (FWP) was designed by using a solvent-free facile vacuum impregnation method. The composite materials exhibited high leakage resistance, improved thermal stability, enhanced thermal conductivity, and improved PCM loading capacity (67.98%). FWP exhibited high latent heat retention of 87.7% after multiple thermal cycles and excellent chemical compatibility with composite constituents. Thus, biochar, derived from biowaste, with organic PCM can be effective in numerous thermal-regulation applications, including air conditioning, and further open avenue for converting waste-to-energy.

Original languageEnglish
Article number135407
JournalChemical Engineering Journal
Volume437
DOIs
Publication statusPublished - 2022 Jun 1

Bibliographical note

Funding Information:
This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (No. 2021R1A4A1032306).

Publisher Copyright:
© 2022 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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