Investigation of a novel shape-stabilized composite phase change material based on biocarbon

IF 3 3区工程技术 Q2 CHEMISTRY, ANALYTICAL

Journal of Thermal Analysis and Calorimetry Pub Date : 2024-12-30 DOI:10.1007/s10973-024-13938-3

Shunhua Yao, Jianong Wang, Jiarui Huang, Qili Shi, Cong Zhang, Xinghui Zhang, Weijia Xing

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引用次数: 0

Abstract

In this study, two types of biocarbons, namely CNCC and ACNCC, were developed by carbonization of corn cob (CNCC) and chemical activation of carbonization corn cob (ACNCC). CNCC and ACNCC were used as support materials mixed with composite phase change materials (cPCMs), respectively, by vacuum impregnation, which can not only prevent the leakage of cPCMs but also enhance its thermal conductivity. The measurement results showed that the specific surface area and pore volume of CNCC increased by 9.4 times and 6.4 times, respectively, after being activated. The cPCM was stably adsorbed into the pores of CNCC and ACNCC. The different components of the new shape-stable cPCMs have good chemical compatibility. Differential scanning calorimetry tests showed that the latent heat of two new cPCMs are 201.80 Jg⁻¹ and 214.02 Jg⁻¹, respectively. The thermal conductivity of two new cPCMs is 0.676 Wm⁻¹ K⁻¹ and 0.725 Wm⁻¹ K⁻¹, respectively. Furthermore, the new shape-stable cPCMs present remarkable chemical structural stability and thermal reliability after 150 heating/cooling cycles. This study provides a new type of hybrid PCM which has potential to be widely applied to heating, cooling and power industry, leading to the enhanced energy efficiency and reduced carbon emission globally.

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基于生物碳的新型形状稳定复合相变材料的研究

本研究通过玉米芯碳化（CNCC）和碳化玉米芯化学活化（ACNCC）制备了CNCC和ACNCC两种类型的生物碳。采用真空浸渍法将CNCC和ACNCC分别与复合相变材料（cPCMs）混合作为支撑材料，既能防止cPCMs泄漏，又能提高其导热性。测定结果表明，活化后CNCC的比表面积和孔体积分别增加了9.4倍和6.4倍。cPCM稳定吸附在CNCC和ACNCC的孔隙中。新型形状稳定的cpcm的不同组分具有良好的化学相容性。差示扫描量热测试表明，两种新型cpcm的潜热分别为201.80 Jg−1和214.02 Jg−1。两种新型cpcm的导热系数分别为0.676 Wm−1 K−1和0.725 Wm−1 K−1。此外，经过150次加热/冷却循环后，新型形状稳定的cpcm具有显著的化学结构稳定性和热可靠性。该研究提供了一种新型的混合PCM，具有广泛应用于供热、制冷和电力行业的潜力，从而在全球范围内提高能源效率和减少碳排放。

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来源期刊

Journal of Thermal Analysis and Calorimetry 化学-分析化学

CiteScore

8.50

自引率

9.10%

发文量

577

审稿时长

3.8 months

期刊介绍： Journal of Thermal Analysis and Calorimetry is a fully peer reviewed journal publishing high quality papers covering all aspects of thermal analysis, calorimetry, and experimental thermodynamics. The journal publishes regular and special issues in twelve issues every year. The following types of papers are published: Original Research Papers, Short Communications, Reviews, Modern Instruments, Events and Book reviews. The subjects covered are: thermogravimetry, derivative thermogravimetry, differential thermal analysis, thermodilatometry, differential scanning calorimetry of all types, non-scanning calorimetry of all types, thermometry, evolved gas analysis, thermomechanical analysis, emanation thermal analysis, thermal conductivity, multiple techniques, and miscellaneous thermal methods (including the combination of the thermal method with various instrumental techniques), theory and instrumentation for thermal analysis and calorimetry.