Macroscopic heat release in a molecular solar thermal energy storage system†,Energy & Environmental Science

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Macroscopic heat release in a molecular solar thermal energy storage system†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-08-20 00:00:00 , DOI: 10.1039/c8ee01011k
Zhihang Wang _{1,

2,

3,

4} , Anna Roffey _{1,

2,

3,

4} , Raul Losantos _{5,

6,

7,

8,

9} , Anders Lennartson _{1,

2,

3,

4} , Martyn Jevric _{1,

2,

3,

4} , Anne U. Petersen _{1,

2,

3,

4} , Maria Quant _{1,

2,

3,

4} , Ambra Dreos _{1,

2,

3,

4} , Xin Wen _{1,

2,

3,

4} , Diego Sampedro _{5,

6,

7,

8,

9} , Karl Börjesson _{3,

4,

10,

11} , Kasper Moth-Poulsen _{1,

2,

3,

4}

Affiliation

The development of solar energy can potentially meet the growing requirements for a global energy system beyond fossil fuels, but necessitates new scalable technologies for solar energy storage. One approach is the development of energy storage systems based on molecular photoswitches, so-called molecular solar thermal energy storage (MOST). Here we present a novel norbornadiene derivative for this purpose, with a good solar spectral match, high robustness and an energy density of 0.4 MJ kg⁻¹. By the use of heterogeneous catalyst cobalt phthalocyanine on a carbon support, we demonstrate a record high macroscopic heat release in a flow system using a fixed bed catalytic reactor, leading to a temperature increase of up to 63.4 °C (83.2 °C measured temperature). Successful outdoor testing shows proof of concept and illustrates that future implementation is feasible. The mechanism of the catalytic back reaction is modelled using density functional theory (DFT) calculations rationalizing the experimental observations.

中文翻译：

分子太阳能储热系统中的宏观热量释放†

太阳能的发展有可能满足除化石燃料之外的全球能源系统不断增长的需求，但需要新的可扩展技术来存储太阳能。一种方法是开发基于分子光电开关的储能系统，即所谓的分子太阳能热能存储（MOST）。在这里，我们提出了一种新的降冰片二烯衍生物，具有良好的太阳光谱匹配性，高鲁棒性和0.4 MJ kg ^-1的能量密度。通过在碳载体上使用非均相催化剂钴酞菁，我们证明了使用固定床催化反应器的流动系统中宏观宏观的放热记录，导致温度升高至63.4°C（测量温度为83.2°C）。成功的户外测试证明了这一概念，并表明未来的实施是可行的。使用密度泛函理论（DFT）计算模型化了催化反应的机理，使实验结果合理化。

更新日期：2018-08-20

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