Competing Occupation of Guest Molecules in Hydroquinone Clathrates Formed from Binary C2H4 and CH4 Gas Mixtures
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- 作者：Jong-Won Lee ; Seong-Pil Kang ; Ji-Ho Yoon
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：April 10, 2014
- 年：2014
- 卷：118
- 期：14
- 页码：7705-7709
- 全文大小：281K
- 年卷期：v.118,no.14(April 10, 2014)
- ISSN：1932-7455
文摘
When reacted with pure ethylene (C2H4) and pure methane (CH4) at 2.0 and 4.0 MPa, respectively, pure hydroquinone (HQ) was converted into 尾-form clathrate compounds. Experimental solid-state 13C NMR spectra and powder X-ray diffraction patterns provided direct evidence of C2H4 and CH4 enclathration in the 尾-form HQ clathrates. On the basis of cage occupancy from the solid-state 13C NMR spectra, C2H4 (cage occupancies of 0.81鈥?.88) molecules are more likely to occupy the clathrate cages than CH4 molecules (cage occupancies of 0.38鈥?.39). The selective occupation by C2H4 was also observed for HQ clathrates formed from C2H4 and CH4 gas mixtures of 10, 30, 50, 70, and 90 mol % concentrations of C2H4. The experimental results from this study could be applied to a clathrate-based process for separating and concentrating C2H4 from gas mixtures.