Sodium sulfate–diatomite composite materials for high temperature thermal energy storage

Yue Qin, Guanghui Leng, Xiang Yu, Hui Cao, Geng Qiao, Yunfeng Dai, Yelong Zhang, Yulong Ding

Research output: Contribution to journalConference articlepeer-review

Abstract

This work explores the use of sodium sulfate and diatomite to formulate composite materials for high temperature thermal energy storage applications. Sodium sulfate in the composite functions as a phase change material (PCM) and diatomite as a structural skeleton for shape stabilization. It is found that sodium sulfate and diatomite have an excellent chemical compatibility with the PCM melting temperature at around 880°C. It is shown that the composite containing 45% diatomite gives an optimal formulation in terms of energy density, salt leakage and mechanical strength. The results also suggest that the composite with the optimal formulation has an application window of 890–980°C. Failures occur to the composite materials at temperatures above 1000°C.
Original languageEnglish
Pages (from-to)37-42
Number of pages6
JournalPowder Technology
Volume282
Early online date28 Sep 2014
DOIs
Publication statusPublished - 1 Sep 2015
Externally publishedYes
EventUK–China International Particle Technical Forum IV - Shanghai, China
Duration: 14 Oct 201317 Oct 2013

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