纳米多孔碳孔径对SrBr2化学蓄放热性能的影响
摘要：摘要溴化锶（SrBr2）被认为是化学蓄热领域最有前景的材料之一。为探究载体孔径大小对SrBr2蓄放热性能的影响,分别以孔径为10、30、50和100 nm的纳米多孔碳（NCP）为载体,采用浸渍法制备多孔碳基SrBr2复合材料。通过XRD、SEM和BET对复合材料的微观形貌结构进行表征,并通过水合实验和同步热分析对其蓄放热性能进行测试。结果表明,复合材料的吸水量和蓄热密度随孔径先增大后减小,存在最优载体孔径。其中,NCP50-SrBr2具有最优的平衡吸水量和蓄热密度,分别为0.703 g/g和1 198.62 kJ/kg。NCP50-SrBr2表现出更快的反应速率,在水合反应30 min后蓄热密度可达945.34 kJ/kg。研究结果可为纳米尺度定向调控化学蓄热材料性能提供理论依据。
Abstract:：Strontium bromide (SrBr2) is one of the most promising storage materials for thermochemical energy storage. To investigate the effect of pore size on thermochemical characterizations of strontium bromide (SrBr2), composites were prepared by the impregnation method loading SrBr2 on nanoporous carbon powder (NCP) with pore sizes of 10, 30, 50, and 100 nm. The microstructure of the composites was characterized by XRD, SEM and BET, and their heat storage and release performances were tested by hydration experiments and simultaneous thermal analysis. The experimental results showed that the hydration capacity and heat storage density of the composites increased and then decreased with the pore size, and there was an optimal carrier pore size. The NCP50-SrBr2 composite had an optimal equilibrium hydration capacity and heat storage density of 0.703 g/g and 1 198.62 kJ/kg, respectively. Moreover, the thermochemical heat storage performance of the NCP50-SrBr2 composite was the best at 30 min, reaching 945.34 kJ/kg, indicating that the NCP50-SrBr2 composite had a faster reaction rate. This study can provide a theoretical basis for the nanoscale directional control of chemical heat storage material properties.
中文标题：纳米多孔碳孔径对SrBr2化学蓄放热性能的影响
英文标题：Pore Size Effect of Nanoporous Carbon Powder on Thermochemical Heat Storage Performances of SrBr2
发表时间：2023-09-19
作者：
吴佳涛, 曾涛, 李军, 邓立生, 黄宏宇
作者简介：
吴佳涛（1999-）,男,硕士研究生,主要从事低温化学储能技术研究。黄宏宇（1978-）,男,博士,研究员,博士生导师,主要从事中低品位热能高效利用研究。
关键词：化学蓄热,孔径,溴化锶,纳米多孔碳,蓄放热性能,
Key words：thermochemical heat storage,pore size,strontium bromide,nanoporous carbon powder,charging/discharging characteristics,
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