Preparation of morph-genetic aluminum-doped calcium oxide templated from cotton and the calcium looping performance for energy storage in the presence of steam
Preparation of morph-genetic aluminum-doped calcium oxide templated from cotton and the calcium looping performance for energy storage in the presence of steam
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DOI：
10.1016/j.est.2023.108325
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发表时间：
2023
影响因子：
9.4
通讯作者：
Xingkang Huang;Xiaotong Ma;Jun Yu Li;Tai Feng;Xiu-de Hu;Cui-Hua Wang
中科院分区：
文献类型：
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作者：
Xingkang Huang;Xiaotong Ma;Jun Yu Li;Tai Feng;Xiu-de Hu;Cui-Hua Wang
钙环（CaL）可以与聚光太阳能（CSP）电站相结合，被认为是一种很有前途的储能技术。为了克服钙基材料随着循环次数的增加而失活的问题，以石灰石、硝酸铝和棉花为原料，采用生物质模板法制备了一种新型的形态发生铝掺杂氧化钙。研究了制备参数和蓄热条件（特别是有蒸汽存在时）对储能性能的影响。结果表明，合成材料保留了生物质模板的空心管状结构，并在Ca12Al14O33的支撑下得到稳定。空心微管结构的存在使得合成材料的孔隙体积增大，孔隙分布发生变化，促进了CO2的扩散。这一现象也解释了合成材料在表观动力学性能和抗烧结性能方面的优越性能。最佳合成材料具有较高的储能密度和碳化率，是石灰石的3倍以上。煅烧过程中蒸汽的存在降低了煅烧温度，减轻了CaO的烧结效果。基于蒸汽的积极效应，提出了太阳能蒸汽系统与CaL-CSP系统相结合的优化路线，有望实现高效储能。
Calcium looping (CaL), which can be combined with concentrated solar power (CSP) plants, is considered a promising technology for energy storage. To overcome the deactivation of calcium based materials with increasing cycles, a novel morph-genetic aluminum doped calcium oxide was prepared by a biomass template method using limestone, aluminum nitrate and cotton as raw materials. The effects of preparation parameters and heat storage conditions (especially in presence of steam) on the energy storage performance were studied. The results showed that the hollow tubular structure of the biomass template was preserved in the synthesized material and stabilized by the support of Ca12Al14O33. The presence of the hollow microtubular structure resulted in an increased pore volume of the synthesized materials and a change of the pore distribution, promoting the diffusion of CO2. This phenomenon also explained the superior performance of the synthesized material in terms of the apparent kinetic properties and resistance to sintering. The optimal synthesized material had a high energy storage density and carbonation fraction, which were more than three times those of limestone. The presence of steam during calcination served to reduce the calcination temperature and mitigate the sintering effect of CaO. An optimization route combining solar steam system and CaL-CSP system was proposed based on the positive effect of steam, which was promising for high-efficiency energy storage.