四氢呋喃
化学
氢气储存
拉曼光谱
笼状水合物
水合物
氢
分子
摩尔分数
化学工程
分析化学(期刊)
无机化学
结晶学
物理化学
有机化学
光学
物理
工程类
溶剂
作者
Takeshi Sugahara,Joanna C. Haag,Pandey Sameer Prasad,Ashleigh A. Warntjes,E. Dendy Sloan,Amadeu K. Sum,Carolyn A. Koh
摘要
Hydrogen hydrates with tetrahydrofuran (THF) as a promoter molecule are investigated to probe critical unresolved observations regarding cage occupancy and storage capacity. We adopted a new preparation method, mixing solid powdered THF with ice and pressurizing with hydrogen at 70 MPa and 255 ± 2 K (these formation conditions are insufficient to form pure hydrogen hydrates). All results from Raman microprobe spectroscopy, powder X-ray diffraction, and gas volumetric analysis show a strong dependence of hydrogen storage capacity on THF composition. Contrary to numerous recent reports that claim it is impossible to store H2 in large cages with promoters, this work shows that, below a THF mole fraction of 0.01, H2 molecules can occupy the large cages of the THF+H2 structure II hydrate. As a result, by manipulating the promoter THF content, the hydrogen storage capacity was increased to ∼3.4 wt % in the THF+H2 hydrate system. This study shows the tuning effect may be used and developed for future science and practical applications.
科研通智能强力驱动
Strongly Powered by AbleSci AI