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Open AccessArticle

Lauric Acid Hybridizing Fly Ash Composite for Thermal Energy Storage

by 1,2, 1,2,*, 1,2, 1,2, 1,2 and 3,*
Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China
School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
Authors to whom correspondence should be addressed.
Minerals 2018, 8(4), 161;
Received: 27 February 2018 / Revised: 8 April 2018 / Accepted: 11 April 2018 / Published: 16 April 2018
(This article belongs to the Special Issue Mineral Materials)
Fly ash includes different mineral phases. This paper reported on the preparation of a novel lauric acid (LA)/fly ash (FA) composite by vacuum impregnation as a form-stable phase change material (PCM) for thermal energy, and especially investigated the effect of the hydrochloric acid-treated fly ash (FAh) on the thermal energy storage performance of the composites. The morphology, crystalline structure, and porous textures of the samples were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), X-ray fluorescence (XRF), and differential scanning calorimetry (DSC). The results indicated that hydrochloric acid treatment was beneficial to the increase of loading capacity and crystallinity of LA in the LA/FAh composite, which caused an enhanced thermal storage capacity with latent heats for melting and freezing of LA/FAh (80.94 and 77.39 J/g), higher than those of LA/FA (34.09 and 32.97 J/g), respectively. Furthermore, the mechanism of enhanced thermal storage properties was investigated in detail. View Full-Text
Keywords: fly ash; mineral phase; lauric acid; hybridization; thermal energy storage fly ash; mineral phase; lauric acid; hybridization; thermal energy storage
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Xu, D.; Yang, H.; Ouyang, J.; Zhang, Y.; Fu, L.; Chen, D. Lauric Acid Hybridizing Fly Ash Composite for Thermal Energy Storage. Minerals 2018, 8, 161.

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