化氧化的合成和表征用于中等热量储存应用
Nawaf Albeladi1,2, Anti Kur3, Robert Mokaya1
1School of Chemistry, University of Nottingham, Nottingham NG7 2RD, UK.
Materials (Basel, Switzerland)
|September 28, 2023
概括
研究人员通过将氧化 (Mg(OH) 2) 与酸 (KNO3) 进行兴奋剂来增强废热回收. 这降低了操作温度,并提高了用于中温应用的储能能力.
科学领域:
- 材料科学 材料科学 材料科学
- 储能 储能 储能 储能 储能 储能
- 热化学 热化学 热化学
背景情况:
- 英国每年产生大量废热,超过电力需求,需要高效的回收技术.
- 热化学储能 (TCES) 为回收和储存各种温度的废热提供了一个有前途的解决方案.
- 氧化 (Mg(OH) 2) 是一种潜在的TCES材料,但其高脱水温度限制了其在中温应用中的使用.
研究的目的:
- 研究酸 (KNO3) 兴奋剂对Mg的热化学特性的影响2.
- 为了评估中温废热储存应用中化Mg(OH) 2的潜力.
主要方法:
- 用5,10,15和20重%KNO3.3添加剂的Mg(OH) 2样本的发展和特征.
- 评估脱水温度和储能能力.
- 通过非异热测试来评估表面拓和热稳定性.
主要成果:
- 含有5重%KNO3的Mg(OH) 2样本表现出最佳的性能.
- 脱水温度从317°C降至293°C.
- 储能容量从1246 J/g增加到1317 J/g.
- 5%重量%的KNO3合样本显示出稳定的表面拓和热稳定性.
结论:
- 用5重%的KNO3合Mg(OH) 2有效降低其脱水温度并增强能量储存能力.
- 这种改性材料显示出中温储热应用 (293°C~400°C) 的巨大潜力.
- 这些发现有助于推进废热回收和利用技术.
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