Synthesis and characterization of salt-impregnated anodic aluminum oxide composites for low-grade heat storage  

作　　者：Bengisu Yilmaz Behiye Yüksel Gökhan Orhan Devrim Aydin Zafer Utlu 

机构地区：[1]stanbul University-Cerrahpasa,Faculty of Engineering,Department of Metallurgy and Materials Engineering,Istanbul 34320,Turkey [2]Istanbul Gedik University,Department of Mechanical Engineering,Istanbul 34876,Turkey [3]Eastern Mediterranean University,Faculty of Engineering,Department of Mechanical Engineering,Mersin 10,Turkey

出　　处：《International Journal of Minerals,Metallurgy and Materials》2020年第1期112-118,共7页矿物冶金与材料学报（英文版）

基　　金：supported by the Scientific and Technological Research Council of Turkey (TUBITAK) (Project No. 315M524);the Scientific Research Projects Coordination Unit of Istanbul University (Project No. 25427)

摘　　要：Thermochemical heat storage(THS)systems have recently attracted a lot of attention in research and development.In this study,an anodic aluminum oxide(AAO)template,fabricated by a two-step anodization method,was used for the first time as the matrix material for a THS system.Different salts were studied as thermochemical materials for their suitability in low-grade heat storage application driven by solar energy for an open system.Compositions were prepared by absorbing CaCl2,MgCl2,LiCl,LiNO3 and mixtures of these salts under a vacuum in an AAO matrix.Field Emission Scanning Electron Microscopy was used to examine the morphology of the produced AAO composites.Thermal energy storage capacities of the composites were characterized using a differential scanning calorimeter.Characterization analysis showed that anodized Al plates were suitable matrix materials for THS systems,and composite sorbent prepared with a 1:1 ratio LiCl/LiNO3 salt mixture had the highest energy value among all composites,with an energy density of 468.1 k J·kg-1.Thermochemical heat storage（THS） systems have recently attracted a lot of attention in research and development. In this study, an anodic aluminum oxide（AAO） template, fabricated by a two-step anodization method, was used for the first time as the matrix material for a THS system. Different salts were studied as thermochemical materials for their suitability in low-grade heat storage application driven by solar energy for an open system. Compositions were prepared by absorbing CaCl2, MgCl2, LiCl, LiNO3 and mixtures of these salts under a vacuum in an AAO matrix. Field Emission Scanning Electron Microscopy was used to examine the morphology of the produced AAO composites. Thermal energy storage capacities of the composites were characterized using a differential scanning calorimeter. Characterization analysis showed that anodized Al plates were suitable matrix materials for THS systems, and composite sorbent prepared with a 1:1 ratio LiCl/LiNO3 salt mixture had the highest energy value among all composites, with an energy density of 468.1 k J·kg-1.

关 键 词：thermal energy storage salt impregnation thermochemical heat storage ANODIZING salt in matrix 

分 类 号：TB33[一般工业技术—材料科学与工程]