Decomposition kinetics and recycle of binary hydrogen‐tetrahydrofuran clathrate hydrate
Decomposition kinetics and recycle of binary hydrogen‐tetrahydrofuran clathrate hydrate
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DOI：
10.1002/aic.12241
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发表时间：
2011
期刊：
影响因子：
3.7
通讯作者：
Hiroki Yoshioka;Masaki Ota;Yoshiyuki Sato;Masaru Watanabe;H. Inomata;R. Smith;C. Peters
中科院分区：
文献类型：
--
作者：
Hiroki Yoshioka;Masaki Ota;Yoshiyuki Sato;Masaru Watanabe;H. Inomata;R. Smith;C. Peters
采用压力衰减法研究了氢-四氢呋喃（H2-THF）笼形水合物在温度265.1 ~ 273.2K、初始压力3.1 ~ 8.0MPa、水合物浓度为化学计量比、粒径250 ~ 1000 μm范围内的分解动力学和循环特性。分解被建模为一个两步过程，包括氢在水合物相的扩散和解吸从水合物笼。吸附过程发生的速度大约是解吸过程的两到三倍，而形成过程中的扩散过程略高（约100%）。20%），在分解过程中。连续的形成和分解循环表明，占用似乎只有轻微的循环，并没有大的变化，水合物结构，由于循环。结果表明，H2笼形水合物的形成和分解是可逆的，并且H2笼形水合物可以在压力下循环。
Decomposition kinetics and recycle of hydrogen―tetrahydrofuran (H 2 ―THF) clathrate hydrates were investigated with a pressure decay method at temperatures from 265.1 to 273.2 K, at initial pressures from 3.1 to 8.0 MPa, and at stoichiometric THF hydrate concentrations for particle sizes between 250 and 1000 μm. The decomposition was modeled as a two-step process consisting of H 2 diffusion in the hydrate phase and desorption from the hydrate cage. The adsorption process occurred at roughly two to three times faster than the desorption process, whereas the diffusion process during formation was slightly higher (ca. 20%) than that during decomposition. Successive formation and decomposition cycles showed that occupancy seemed to decrease only slightly with cycling and that there were no large changes in hydrate structure due to cycling. Results provide evidence that the formation and decomposition of H 2 clathrate hydrates occur reversibly and that H 2 clathrate hydrates can be recycled with pressure.