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Rapid and high hydrogen storage in epoxycyclopentane hydrate at moderate pressure
Energy ( IF 9.0 ) Pub Date : 2023-01-07 , DOI: 10.1016/j.energy.2023.126638
Siyuan Chen , Yanhong Wang , Xuemei Lang , Shuanshi Fan , Gang Li

Hydrogen storage in clathrate hydrate is considered to be a potential technology with high energy density. However, the problems of low gas storage capacity and slow hydrate formation hinder its application. In this work, several strengthen methods were investigated to improving hydrogen storage capacity and rate in epoxycyclopentane (ECP) hydrates at moderate pressure. The results showed that the ECP hydrate particles could promote the formation of hydrate. It was found that the gas storage capacity and the rate increased with the decrease in ECP hydrate particle sizes. After dispersing ECP hydrate particles on stainless steel mesh, the gas storage capacity can be further increased to 71.2 cm3/cm3hydrate (0.64 wt%), and the average gas storage rate can be further increased to 26.51 cm3/(cm3hydrate h−1). It was found that decreasing particle size of hydrate could increase the gas-solid interface area and raised the gas adsorption rate and adsorption amount. The stainless-steel mesh partitions improved the hydrogen storage capacity due to the good thermal conductivity that reduced the influence of hydrate formation heat and dispersing the hydrate particles that reduced the diffusion distance of hydrogen in the pores. These findings provide fundamental insights into the development of clathrate hydrate-based H2 storage technology.



中文翻译:

在中等压力下环氧环戊烷水合物中快速和高储氢

笼形水合物中的氢储存被认为是具有高能量密度的潜在技术。但储气量低、水合物形成缓慢等问题阻碍了其应用。在这项工作中,研究了几种强化方法来提高中等压力下环氧环戊烷 (ECP) 水合物的储氢能力和速率。结果表明,ECP水合物颗粒可以促进水合物的形成。结果发现,储气容量和速率随着 ECP 水合物粒径的减小而增加。在不锈钢网上分散ECP水合物颗粒后,储气量可进一步增加至71.2 cm 3 /cm 3水合物(0.64 wt%),平均储气率可进一步提高至26.51 cm 3 /(cm 3 hydrate h -1 )。结果表明,减小水合物的粒径可以增加气固界面面积,提高气体吸附速率和吸附量。不锈钢网状隔板具有良好的导热性,减少了水合物形成热的影响,分散了水合物颗粒,减少了氢在孔隙中的扩散距离,从而提高了储氢能力。这些发现为开发基于笼形水合物的 H 2储存技术提供了基本见解。

更新日期:2023-01-10
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