Surface Roughness-Governed Shape Stability of the Coal Fly Ash-Based Phase Change Material: Molten Salt Processing and Thermal Properties

doi:10.3390/en14051427

GIEC OpenIR

	Surface Roughness-Governed Shape Stability of the Coal Fly Ash-Based Phase Change Material: Molten Salt Processing and Thermal Properties
	Li, Denian 1,2,3; Yang, Jizhang 1,2,3; Chang, Menglei 4; Zhao, Yue 1,2,3,5; Yuan, Haoran1,2,3 ; Chen, Yong1,2,3
	2021-03-01
发表期刊	ENERGIES
卷号	14 期号:5 页码:10
通讯作者	Yuan, Haoran(yuanhr@ms.giec.ac.cn)
摘要	Coal fly ash (FA) valorization is of great significance and sustainable interests to addressing the current environmental challenges faced by coal power industry. Herein, this work attempted a novel molten salt Na2CO3 treatment for processing FA into a robust matrix to support lauric acid (LA) toward construction of latent phase change composite. Their micromorphology, physiochemical, and thermal properties were monitored with scanning and transmission microscopy, X-ray diffraction and FT-IR spectroscopy, differential scanning calorimetry, among others. As Na2CO3 dosage increased from 20% to 40%, the FA experienced firstly higher loss of SiO2 and then substantial loss of Al2O3, and yet exhibited merely varied porosity. Then, both the composites revealed a maximum LA content of 20% that doubled that of pristine FA. Nevertheless, the optimal composite was disclosed with thermal conductivity of 0.5668 W/mK, which was 69% higher than its FA-based counterpart. It was proposed that the surface roughness evidenced by the formation of tremendous grooves and gaps during thermal alkaline processing were accountable for the promoted carrying capacity toward organic component. Furthermore, the latent phase change composite revealed excellent durability, including negligibly varied phase transition temperature and enthalpy even after 1500 thermal cycling, which promised great interest in passive building cooling. Meanwhile, the finds here led to a new understanding into the structural origin of adsorption capacity by inorganic FA, and may provide guidance for better exploration of its characteristics for other applications.
关键词	fly ash molten salts surface roughness enhanced thermal conductivity phase change material
DOI	10.3390/en14051427
收录类别	SCI
语种	英语
资助项目	Key-Area Research and Development Program of Guangdong Province[2019B110209003] ; Science and Technology Project of Guangdong Province[2016A020221025] ; Natural Science Foundation of Guangdong Province[2019A1515011570] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0101]
WOS研究方向	Energy & Fuels
项目资助者	Key-Area Research and Development Program of Guangdong Province ; Science and Technology Project of Guangdong Province ; Natural Science Foundation of Guangdong Province ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
WOS类目	Energy & Fuels
WOS记录号	WOS:000628174600001
出版者	MDPI
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/32792
专题	中国科学院广州能源研究所
通讯作者	Yuan, Haoran
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Lab Integrated Technol Urban & Rural Mines Exploi, 2 Nengyuan Rd, Guangzhou 510640, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Guangzho, Guangzhou 511458, Peoples R China 3.Chinese Acad Sci, Guangdong Prov Key Lab New & Renewable Energy, Guangzhou 510640, Peoples R China 4.Foshan Univ, Sch Mat & Energy, Foshan 528225, Peoples R China 5.Wuhan Univ Technol, Sch Mat Sci & Engn, Wuhan 430070, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Li, Denian,Yang, Jizhang,Chang, Menglei,et al. Surface Roughness-Governed Shape Stability of the Coal Fly Ash-Based Phase Change Material: Molten Salt Processing and Thermal Properties[J]. ENERGIES,2021,14(5):10.
APA	Li, Denian,Yang, Jizhang,Chang, Menglei,Zhao, Yue,Yuan, Haoran,&Chen, Yong.(2021).Surface Roughness-Governed Shape Stability of the Coal Fly Ash-Based Phase Change Material: Molten Salt Processing and Thermal Properties.ENERGIES,14(5),10.
MLA	Li, Denian,et al."Surface Roughness-Governed Shape Stability of the Coal Fly Ash-Based Phase Change Material: Molten Salt Processing and Thermal Properties".ENERGIES 14.5(2021):10.