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Title: Origin of Two Distinct Peaks of Ice in the THz Region and Its Application for Natural Gas Hydrate Dissociation

Abstract

For liquid water in the far-infrared spectrum, phonons of molecular vibrations constitute two bands with a narrow gap at around 30 meV. Interestingly, there are two distinct peaks for ice in this gap. We demonstrated that the two peaks come from two kinds of translational modes. Considering different O–O–O bending constants, we yielded two frequencies based on the ideal model of ice Ic. These two kinds of vibrational modes do not exist in liquid water due to the collapse of the rigid tetrahedral structure. Thus, a window remains for ice resonance absorption with minimum energy loss in liquid water. A new method to decompose gas hydrates was proposed by supplying two terahertz radiation energies at ~6.8 and 9.1 THz. This is also applicable to flow assurance in gas pipelines, aircraft deicers, and so on. Experimental measurements are expected to verify this finding along with the rapid development of a THz laser.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Shandong Univ., Jinan (China). School of Space Science and Physics
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Neutron Scattering Division
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1606685
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. C
Additional Journal Information:
Journal Volume: 124; Journal Issue: 1; Journal ID: ISSN 1932-7447
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Molecules; Oscillation; Solvates; Energy; Water

Citation Formats

Zhu, Xu-Liang, Cao, Jing-Wen, Qin, Xiao-Ling, Jiang, Lu, Gu, Yue, Wang, Hao-Cheng, Liu, Yang, Kolesnikov, Alexander I., and Zhang, Peng. Origin of Two Distinct Peaks of Ice in the THz Region and Its Application for Natural Gas Hydrate Dissociation. United States: N. p., 2019. Web. https://doi.org/10.1021/acs.jpcc.9b09604.
Zhu, Xu-Liang, Cao, Jing-Wen, Qin, Xiao-Ling, Jiang, Lu, Gu, Yue, Wang, Hao-Cheng, Liu, Yang, Kolesnikov, Alexander I., & Zhang, Peng. Origin of Two Distinct Peaks of Ice in the THz Region and Its Application for Natural Gas Hydrate Dissociation. United States. https://doi.org/10.1021/acs.jpcc.9b09604
Zhu, Xu-Liang, Cao, Jing-Wen, Qin, Xiao-Ling, Jiang, Lu, Gu, Yue, Wang, Hao-Cheng, Liu, Yang, Kolesnikov, Alexander I., and Zhang, Peng. Wed . "Origin of Two Distinct Peaks of Ice in the THz Region and Its Application for Natural Gas Hydrate Dissociation". United States. https://doi.org/10.1021/acs.jpcc.9b09604. https://www.osti.gov/servlets/purl/1606685.
@article{osti_1606685,
title = {Origin of Two Distinct Peaks of Ice in the THz Region and Its Application for Natural Gas Hydrate Dissociation},
author = {Zhu, Xu-Liang and Cao, Jing-Wen and Qin, Xiao-Ling and Jiang, Lu and Gu, Yue and Wang, Hao-Cheng and Liu, Yang and Kolesnikov, Alexander I. and Zhang, Peng},
abstractNote = {For liquid water in the far-infrared spectrum, phonons of molecular vibrations constitute two bands with a narrow gap at around 30 meV. Interestingly, there are two distinct peaks for ice in this gap. We demonstrated that the two peaks come from two kinds of translational modes. Considering different O–O–O bending constants, we yielded two frequencies based on the ideal model of ice Ic. These two kinds of vibrational modes do not exist in liquid water due to the collapse of the rigid tetrahedral structure. Thus, a window remains for ice resonance absorption with minimum energy loss in liquid water. A new method to decompose gas hydrates was proposed by supplying two terahertz radiation energies at ~6.8 and 9.1 THz. This is also applicable to flow assurance in gas pipelines, aircraft deicers, and so on. Experimental measurements are expected to verify this finding along with the rapid development of a THz laser.},
doi = {10.1021/acs.jpcc.9b09604},
journal = {Journal of Physical Chemistry. C},
number = 1,
volume = 124,
place = {United States},
year = {2019},
month = {12}
}

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