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Minerals 2018, 8(4), 161; doi:10.3390/min8040161

Lauric Acid Hybridizing Fly Ash Composite for Thermal Energy Storage

1
Centre for Mineral Materials, School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China
2
Hunan Key Lab of Mineral Materials and Application, Central South University, Changsha 410083, China
3
School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
*
Authors to whom correspondence should be addressed.
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)
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Abstract

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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