Preparation and characterization of modified steel slag-based composite phase change materials

IF 2.6 3区工程技术 Q2 ENGINEERING, MECHANICAL International Journal of Heat and Fluid Flow Pub Date : 2024-11-23 DOI:10.1016/j.ijheatfluidflow.2024.109666

Chenhao Yang , Zekai Zhang , Haowen Yu , Nian Xu , Zucun Rui , Huaqiang Chu

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Abstract

In order to promote the resource utilization in steel slag and reduce the environmental hazards caused by steel slag, a steel slag-based composite phase change material was prepared in this experiment. Steel slag had a porous structure with good structural stability, which could be used to prepare composite phase change materials and applied in fields such as thermal energy storage and waste heat recovery. To enhance the adsorption capacity of steel slag on phase change materials, the impact of acid or alkali modifiers on steel slag was meticulously examined. The investigation revealed that the pore structure of the modified steel slag was markedly enhanced, accompanied by a notable improvement in adsorption capacity. Among the results, the adsorption rate of the acid washed modified steel slag for paraffin reached 35 %, with the phase change temperature and latent heat of phase change being 53 °C and 60 J/g. Acid washing had a significant impact on the pore structure of the steel slag, with the adsorption rate of the acid washed modified steel slag for paraffin being approximately twice that of the unmodified steel slag.

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改性钢渣基复合相变材料的制备与表征

为了促进钢渣的资源化利用，减少钢渣对环境造成的危害，本实验制备了一种基于钢渣的复合相变材料。钢渣具有多孔结构，结构稳定性好，可用于制备复合相变材料，并应用于热能储存和余热回收等领域。为了提高钢渣对相变材料的吸附能力，实验细致研究了酸碱改性剂对钢渣的影响。研究发现，改性钢渣的孔隙结构明显改善，同时吸附能力也显著提高。其中，酸洗改性钢渣对石蜡的吸附率达到 35%，相变温度和相变潜热分别为 53 °C 和 60 J/g。酸洗对钢渣的孔隙结构有显著影响，酸洗改性钢渣对石蜡的吸附率约为未改性钢渣的两倍。

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来源期刊

International Journal of Heat and Fluid Flow 工程技术-工程：机械

CiteScore

5.00

自引率

7.70%

发文量

131

审稿时长

33 days

期刊介绍： The International Journal of Heat and Fluid Flow welcomes high-quality original contributions on experimental, computational, and physical aspects of convective heat transfer and fluid dynamics relevant to engineering or the environment, including multiphase and microscale flows. Papers reporting the application of these disciplines to design and development, with emphasis on new technological fields, are also welcomed. Some of these new fields include microscale electronic and mechanical systems; medical and biological systems; and thermal and flow control in both the internal and external environment.