纳米多孔碳对MgOMgOH2化学蓄热性能影响的实验研究
摘要：摘要为提高MgO/Mg(OH)2的热化学蓄/放热性能,采用焙烧法将氧化镁（MgO）负载在纳米多孔碳（NCP）材料上制备纳米碳基氧化镁（NCP-MgO）复合材料。研究结果表明,NCP载体使MgO在其表面形成粒径为10 ~ 30 nm大小的颗粒,复合材料NCP-MgO具有较高的导热系数,负载80% MgO后导热系数是纯MgO的2.6倍。在反应温度110℃、水蒸气压力57.8 kPa的实验工况下,发现水合速率的大幅提升是强化MgO/Mg(OH)2蓄热性能的主要原因,在水合反应60 min和120 min时,NCP-MgO复合材料的水合转化率分别是纯MgO的2.25倍和1.6倍。在水合反应120 min后,MgO负载率为80%的NCP-MgO复合材料的蓄热密度可达1 053 kJ/kg,是纯MgO的1.4倍。该研究可为MgO/Mg(OH)2在化学蓄热系统的应用提供一定的参考。
Abstract:：In order to improve the thermochemical heat storage and release performance of MgO/Mg(OH)2, magnesium oxide (MgO) was loaded on nanoporous carbon powder (NCP) materials by roasting method to prepare nano-carbon-based magnesium oxide (NCP-MgO) composites. Results showed that the NCP carrier enabled MgO to form 10-30 nm particles on its surface. The high thermal conductivity of composite NCP-MgO was 2.6 times that of pure MgO when loaded with 80% MgO. Under the experimental conditions of reaction temperature of 110oC and vapor pressure of 57.8 kPa, it was found that the significant increase of hydration rate was the main reason for strengthening the heat storage performance of MgO/Mg(OH)2: when the hydration reaction time was 60 min and 120 min, the hydration conversion of NCP-MgO composite was 2.25 times and 1.6 times that of pure MgO, respectively. After hydration for 120 min, the heat storage density of NCP-MgO composite with loading rate of 80% MgO reached 1 053 kJ/kg, 1.4 times that of pure MgO. This study may provide some reference for the application of MgO/Mg(OH)2 in chemical heat storage system.
中文标题：纳米多孔碳对MgOMg(OH)2化学蓄热性能影响的实验研究
英文标题：Experimental Study on the Effect of Nanoporous Carbon on the Chemical Heat Storage Performance of MgO/Mg(OH)2
发表时间：2022-03-09
作者：
肖林发, 邓立生, 李军, 曾涛, 黄宏宇, 周友
作者简介：
肖林发（1995-）,男,硕士研究生,主要从事中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,主要从事中低品位能提质高效利用方面的工作,重点开展化学储热、吸附式除湿以及制冷技术研究。
关键词：化学蓄热,氧化镁,纳米多孔碳,水化反应,复合材料,
Key words：chemical heat storage,magnesium oxide,nano-porous carbon,hydration reaction,composite material,
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