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首页> 外文期刊>Energy Conversion & Management >Development of dense Ca-based, Al-stabilized composites with high volumetric energy density for thermochemical energy storage of concentrated solar power
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Development of dense Ca-based, Al-stabilized composites with high volumetric energy density for thermochemical energy storage of concentrated solar power

机译：高容量能量密度为集中太阳能储存的高容量能量密度的致密CA，Al稳定复合材料

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摘要

Thermochemical energy storage based on the Calcium-Looping process characterized high energy density, low cost, and scalability, which is an advantageous candidate for the heat storage systems of Concentrated Solar Power plants. The main disadvantage of Calcium-Looping technology is the rapid decrease in the reactivity of CaO during cycling due to sintering. Many methods have been developed to synthesize high-cycling-behavior CaO-based materials. However, the state-of-the-art synthesized CaO-based materials remain far from the requirements due to the lack of consideration from an application perspective, which not only demands highcycling-behavior but also needs to consider volumetric energy density. In this work, dense CaO/Al2O3 composites were fabricated using the space-confined chemical vapor deposition method and considering both stability and volumetric energy density. Among different Ca-precursors, calcium formate does not expand during calcination, thus possesses a relatively dense structure, and taken together with the deposition of Al2O3 on the surface of CaO grains obtained composites possessing high density and excellent stability. The optimized composite with 10 mol.% Al achieves a high volumetric energy density of 2.07 GJ/m(3) after 20 cycles, which is 1.58, 4.31, and 6.68 times of the capacity of limestone-derived CaO, sol-gel based CaO/Al2O3 composites, and wet-mixing based CaO/Al2O3 composites, respectively. This study presents a design principle for CaO-based heat storage materials, which are becoming denser and more stable.
机译：基于钙环化过程的热化学能量存储特征在于高能量密度，低成本和可扩展性，这是集中的太阳能发电厂的蓄热系统的有利候选者。钙循环技术的主要缺点是由于烧结导致循环期间CAO反应性的快速降低。已经开发了许多方法来合成高循环行为CaO的材料。然而，由于缺乏申请角度缺乏考虑，最先进的基于CAO基材料仍然远离要求，这不仅要求高循环行为，而且需要考虑体积能量密度。在这项工作中，使用空间限制化学气相沉积方法制造致密的CaO / Al2O3复合材料，并考虑稳定性和体积能密度。在不同的Ca-前体中，钙甲酸钙在煅烧期间不会膨胀，因此具有相对致密的结构，并与Al 2 O 3的沉积一起在CaO晶粒的表面上沉积，得到具有高密度和优异稳定性的复合材料。具有10 mol的优化复合材料。％Al在20个循环后的高容量能量密度为2.07 gj / m（3），该循环为1.58,4.31和6.68倍的石灰石衍生的CaO，溶胶基溶胶的Cao / Al 2O3复合材料，分别和湿式混合的CaO / Al2O3复合材料。本研究提出了CAO基蓄热材料的设计原理，变得更加密集，更稳定。

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  • 来源
    《Energy Conversion & Management》 |2020年第10期|113201.1-113201.10|共10页
  • 作者

    Han Rui; Gao Jihui; Wei Siyu; Sun Fei; Liu Qingling; Qin Yukun;

  • 作者单位

    Harbin Inst Technol Sch Energy Sci & Engn Harbin 150001 Peoples R China|Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Indoor Air Environm Qual Control Tianjin 300350 Peoples R China|Tianjin Univ Sch Mech Engn State Key Lab Engines Tianjin 300350 Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin 150001 Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin 150001 Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin 150001 Peoples R China;

    Tianjin Univ Sch Environm Sci & Engn Tianjin Key Lab Indoor Air Environm Qual Control Tianjin 300350 Peoples R China|Tianjin Univ Sch Mech Engn State Key Lab Engines Tianjin 300350 Peoples R China;

    Harbin Inst Technol Sch Energy Sci & Engn Harbin 150001 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Renewable resources; Thermochemical heat storage; Calcium-looping; Calcium oxides; Volumetric energy density;

    机译：可再生资源;热化学蓄热;钙环;氧化钙;体积能密度;

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