材料科学
热能储存
生物炭
复合材料
各向异性
碳化
可再生能源
化学工程
热解
光学
热力学
扫描电子显微镜
电气工程
物理
工程类
作者
Ruirui Yang,Xiran Guo,Haoyang Wu,Weizhi Kang,Kun Song,Yaqiong Li,Xiubing Huang,Ge Wang
出处
期刊:Biochar
[Springer Nature]
日期:2022-07-22
卷期号:4 (1)
被引量:23
标识
DOI:10.1007/s42773-022-00162-1
摘要
Abstract As cheap and renewable sources, the exploitation of biomass resources was of great value in phase change energy storage. In this study, hemp stems were converted into biochars with three-dimensional multi-level anisotropic pores through a temperature-controlled charring process, which were used as supports for polyethylene glycol (PEG6000) to form shape-stable composite phase change materials (ss-CPCMs). It is shown that the ss-CPCMs using anisotropic hemp-stem-derived biochar obtained at a carbonization temperature of 900 °C as a support has high PEG6000 loading rate (88.62wt%), large latent heat (170.44 J/g) and favorable thermal stability owning to its high surface area and hierarchical pores. The biochar-based ss-CPCM also has good light absorption ability with a maximum solar-thermal conversion efficiency of 97.70%. In addition, the different thermal conductivities in the transverse and longitudinal directions of ss-CPCMs reflect the unique anisotropic structure. This work can not only improve the high-value utilization of biochars, but also provide the ss-CPCMs with excellent performance for solar-thermal conversion and storage systems. Graphical Abstract
科研通智能强力驱动
Strongly Powered by AbleSci AI