Thermodynamic stability and characterization of double clathrate hydrate with carbon dioxide + cyclopentane + deuterium oxide

Meku Maruyama; Shun Nagayama; Takuma Misawa; Satoshi Takeya; Ryo Ohmura

doi:10.1016/j.jct.2022.106998

Thermodynamic stability and characterization of double clathrate hydrate with carbon dioxide + cyclopentane + deuterium oxide

Meku Maruyama, Shun Nagayama, Takuma Misawa, Satoshi Takeya, Ryo Ohmura

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

This paper reports characterization of clathrate hydrate formed in CO₂ + cyclopentane + deuterium oxide (D₂O) system with the phase equilibrium determination and the powder X-ray diffraction (PXRD) measurements towards the development of hydrate-based tritium separation technology. Four-phase (CO₂ gas + liquid cyclopentane + liquid D₂O + hydrate) equilibrium conditions were measured using the isochoric procedure in the pressure range from 0.279 MPa to 2.735 MPa and the temperature range from 285.35 K to 293.65 K. The equilibrium temperature of CO₂ + cyclopentane + D₂O system is always higher by 2.0 K to 2.4 K compared to that of CO₂ + cyclopentane + H₂O system. The detailed crystallographic properties of both CO₂ + cyclopentane + D₂O hydrate and CO₂ + cyclopentane + H₂O hydrate including the lattice constants, the radii and volumes of each cage and the cage occupancy were estimated by the PXRD analysis. Based on the obtained results, implications for the development and operation of D₂O-hydrate-based process are discussed.

Original language	English
Article number	106998
Journal	Journal of Chemical Thermodynamics
Volume	179
DOIs	https://doi.org/10.1016/j.jct.2022.106998
Publication status	Published - 2023 Apr

Keywords

Carbon dioxide
Clathrate hydrate
Cyclopentane
Deuterium oxide
Phase equilibrium
Powder X-ray diffraction

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Materials Science(all)
Physical and Theoretical Chemistry

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10.1016/j.jct.2022.106998

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title = "Thermodynamic stability and characterization of double clathrate hydrate with carbon dioxide + cyclopentane + deuterium oxide",

abstract = "This paper reports characterization of clathrate hydrate formed in CO2 + cyclopentane + deuterium oxide (D2O) system with the phase equilibrium determination and the powder X-ray diffraction (PXRD) measurements towards the development of hydrate-based tritium separation technology. Four-phase (CO2 gas + liquid cyclopentane + liquid D2O + hydrate) equilibrium conditions were measured using the isochoric procedure in the pressure range from 0.279 MPa to 2.735 MPa and the temperature range from 285.35 K to 293.65 K. The equilibrium temperature of CO2 + cyclopentane + D2O system is always higher by 2.0 K to 2.4 K compared to that of CO2 + cyclopentane + H2O system. The detailed crystallographic properties of both CO2 + cyclopentane + D2O hydrate and CO2 + cyclopentane + H2O hydrate including the lattice constants, the radii and volumes of each cage and the cage occupancy were estimated by the PXRD analysis. Based on the obtained results, implications for the development and operation of D2O-hydrate-based process are discussed.",

keywords = "Carbon dioxide, Clathrate hydrate, Cyclopentane, Deuterium oxide, Phase equilibrium, Powder X-ray diffraction",

author = "Meku Maruyama and Shun Nagayama and Takuma Misawa and Satoshi Takeya and Ryo Ohmura",

note = "Funding Information: This study was supported by Keirin-racing-based research promotion fund from the JKA Foundation (grant No. 2022M-270). The authors are grateful to Taro Iwai, Risa Tokunaga and Haruki Ito for their experimental support and encouragement. Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

year = "2023",

month = apr,

doi = "10.1016/j.jct.2022.106998",

language = "English",

volume = "179",

journal = "Journal of Chemical Thermodynamics",

issn = "0021-9614",

publisher = "Academic Press Inc.",

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T1 - Thermodynamic stability and characterization of double clathrate hydrate with carbon dioxide + cyclopentane + deuterium oxide

AU - Maruyama, Meku

AU - Nagayama, Shun

AU - Misawa, Takuma

AU - Takeya, Satoshi

AU - Ohmura, Ryo

N1 - Funding Information: This study was supported by Keirin-racing-based research promotion fund from the JKA Foundation (grant No. 2022M-270). The authors are grateful to Taro Iwai, Risa Tokunaga and Haruki Ito for their experimental support and encouragement. Publisher Copyright: © 2022 Elsevier Ltd

PY - 2023/4

Y1 - 2023/4

N2 - This paper reports characterization of clathrate hydrate formed in CO2 + cyclopentane + deuterium oxide (D2O) system with the phase equilibrium determination and the powder X-ray diffraction (PXRD) measurements towards the development of hydrate-based tritium separation technology. Four-phase (CO2 gas + liquid cyclopentane + liquid D2O + hydrate) equilibrium conditions were measured using the isochoric procedure in the pressure range from 0.279 MPa to 2.735 MPa and the temperature range from 285.35 K to 293.65 K. The equilibrium temperature of CO2 + cyclopentane + D2O system is always higher by 2.0 K to 2.4 K compared to that of CO2 + cyclopentane + H2O system. The detailed crystallographic properties of both CO2 + cyclopentane + D2O hydrate and CO2 + cyclopentane + H2O hydrate including the lattice constants, the radii and volumes of each cage and the cage occupancy were estimated by the PXRD analysis. Based on the obtained results, implications for the development and operation of D2O-hydrate-based process are discussed.

AB - This paper reports characterization of clathrate hydrate formed in CO2 + cyclopentane + deuterium oxide (D2O) system with the phase equilibrium determination and the powder X-ray diffraction (PXRD) measurements towards the development of hydrate-based tritium separation technology. Four-phase (CO2 gas + liquid cyclopentane + liquid D2O + hydrate) equilibrium conditions were measured using the isochoric procedure in the pressure range from 0.279 MPa to 2.735 MPa and the temperature range from 285.35 K to 293.65 K. The equilibrium temperature of CO2 + cyclopentane + D2O system is always higher by 2.0 K to 2.4 K compared to that of CO2 + cyclopentane + H2O system. The detailed crystallographic properties of both CO2 + cyclopentane + D2O hydrate and CO2 + cyclopentane + H2O hydrate including the lattice constants, the radii and volumes of each cage and the cage occupancy were estimated by the PXRD analysis. Based on the obtained results, implications for the development and operation of D2O-hydrate-based process are discussed.

KW - Carbon dioxide

KW - Clathrate hydrate

KW - Cyclopentane

KW - Deuterium oxide

KW - Phase equilibrium

KW - Powder X-ray diffraction

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Thermodynamic stability and characterization of double clathrate hydrate with carbon dioxide + cyclopentane + deuterium oxide

Abstract

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