Journal of Nanoparticle Research ( IF 2.5 ) Pub Date : 2019-11-28 , DOI: 10.1007/s11051-019-4694-z Caifeng Huang , Min Xu , Xiulan Huai
Thermochemical energy storage is a promising alternation in heat recovery application and concentrated solar power plants. The present work focuses on the influence of morphology and porosity of Ca(OH)2 nanomaterials on their thermochemical energy storage performances. Firstly, the Ca(OH)2 nanoparticles with the morphologies of spindle and hexagonal structure were synthesized by the deposition-precipitation method, and their performances were evaluated by thermogravimetric analysis together with three kinds of commercial nanoparticles. The BET tests demonstrate that the self-made spindle-shaped Ca(OH)2 has the highest BET-specific surface area and pore volume among these five nanomaterials. Secondly, the thermochemical energy storage performance evaluation of these materials showed that the spindle-shaped Ca(OH)2 exhibited the best heat storage and output capacities (about 1300 kJ/kg), thus bringing a convenient route in production of Ca(OH)2 with higher energy storage density. Finally, after ten dehydration/hydration cycles, the conversions of spindle-shaped Ca(OH)2 remained at above 70%.
中文翻译:
纺锤形热化学储能氢氧化钙纳米材料的合成及性能评价
热化学储能是热回收应用和集中式太阳能发电厂的一个有前途的替代方案。目前的工作集中在Ca(OH)2纳米材料的形貌和孔隙率对其热化学能量存储性能的影响。首先,通过沉积-沉淀法合成了具有纺锤形和六边形结构的Ca(OH)2纳米颗粒,并通过热重分析与三种市售纳米颗粒一起对其性能进行了评估。BET测试表明,自制的纺锤形Ca(OH)2在这五种纳米材料中,具有最高的BET比表面积和孔体积。其次,对这些材料的热化学储能性能评估表明,纺锤形的Ca(OH)2表现出最佳的储热和输出能力(约1300 kJ / kg),从而为生产Ca(OH)提供了便利的途径。2.具有更高的储能密度。最后,在十个脱水/水合循环后,纺锤形Ca(OH)2的转化率保持在70%以上。