Application of CoFe_(2)O_(4)-NiO nanoparticle-coated foam-structured material in a high-flux solar thermochemical reactor  

作　　者：ZHANG Hao ZHANG XiaoMi YANG DaZhi SHUAI Yong GUENE LOUGOU Bachirou PAN QingHui WANG FuQiang 

机构地区：[1]School of Electrical Engineering and Automation,Harbin Institute of Technology,Harbin 150001,China [2]School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China [3]School of New Energy,Harbin Institute of Technology at Weihai,Weihai 264209,China

出　　处：《Science China(Technological Sciences)》2023年第11期3276-3286,共11页中国科学（技术科学英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2018YFA0702300);the National Natural Science Foundation of China(Grant No.52106085);the Heilongjiang Postdoctoral Fund(Grant No.LBH-Z22120)。

摘　　要：The splitting of carbon dioxide through the two-step solar thermochemical cycle presents enormous potential,for it holds the dual functionalities of solar fuel production and carbon-based energy recovery.However,the industrialization of this technology is impeded by two critical factors:The absence of fully developed oxygen carriers and advanced reaction devices that deliver exceptional performance.In order to identify a potentially effective oxygen carrier,50 wt%NiO-modified Co Fe_(2)O_(4)is selected as the active component and characterized by means of thermogravimetry,scanning electron microscopy,and energy dispersive spectroscopy,so as to clarify its oxygen exchange capacity,micromorphology and elemental composition in high-temperature thermochemical cycles.Further,nanoparticle-coated foam-structured materials are prepared in combination with Si C ceramic foam for experimental testing in a high-flux solar reactor.The results indicate that a peak CO yield of 1.96 m L min^(-1)g^(-1)can be gained in a 1500–1250 K preliminary test,demonstrating the application potential of the material.In contrast to conventional redox materials,the CO_(2)activity of the materials synthesized in this study exhibits an enhancement with rising oxidation temperature.It means that isothermal cycles can potentially achieve higher conversion and fuel yield than non-isothermal cycles,while simultaneously reducing the amount of irreversible heat loss during high-temperature cycling.Although the estimated steadystate thermal efficiency of the solar reactor can reach up to 42%,further optimization of the reactor design is necessary to enhance energy conversion efficiency,as it is partially limited by the dimensions of the reaction chamber.

关 键 词：solar thermochemistry CO_(2)splitting two-step redox cycle iron-base oxygen carrier reactor design 

分 类 号：TK519[动力工程及工程热物理—热能工程] TB383.1[一般工业技术—材料科学与工程]