The Development of Clathrate Hydrate Science

Ratcliffe, Christopher I.

doi:10.1021/acs.energyfuels.2c01723

Cited by 20 publications

(14 citation statements)

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“…Ratcliffe presented a review on the development of the clathrate hydrate science over its roughly 200 year history. 27 Zhu et al 28 reported an account of the use of Raman spectroscopy to identify the structure and molar composition of hydrate and how in situ information on the kinetics of formation, decomposition, replacement, and molecular diffusion at the molecular level is obtained. Pan et al 29 analyzed natural gas hydrate samples spatially resolved using Raman spectroscopy to identify whether these natural samples only show heterogeneity with regard to their cage occupancy and composition or whether they already show coexistent phases.…”

Section: ■ Fundamentalsmentioning

confidence: 99%

“…Ratcliffe presented a review on the development of the clathrate hydrate science over its roughly 200 year history . Zhu et al reported an account of the use of Raman spectroscopy to identify the structure and molar composition of hydrate and how in situ information on the kinetics of formation, decomposition, replacement, and molecular diffusion at the molecular level is obtained.…”

Section: Fundamentalsmentioning

confidence: 99%

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2022 Pioneers in Energy Research: John Ripmeester

Kumar

Linga

2022

Energy Fuels

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Metrics & More Article Recommendations Energy & Fuels established the annual recognition of Pioneers in Energy Research (PIERs) in 2021 to honor highly influential scientists who have made significant fundamental contributions in their respective fields of energy research. 1 Dr. John Ripmeester has been selected as the 2022 PIER in the field of unconventional energy sources for his outstanding contribution to the area of gas hydrate research. 2 We are honored to have the opportunity to celebrate his outstanding contributions to the field in this special issue. Dr. Ripmeester completed his Bachelor of Science degree with honors in chemistry at the University of British Columbia (Vancouver, Canada) in 1965 and continued in the same university to complete his Ph.D. degree in physical chemistry in 1970 under the guidance of Dr. Basil Dunell.

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Section: ■ Fundamentalsmentioning

confidence: 99%

Section: Fundamentalsmentioning

confidence: 99%

2022 Pioneers in Energy Research: John Ripmeester

Kumar

Linga

2022

Energy Fuels

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“…Gas hydrates are crystalline compounds that form when guest molecules (such as methane, ethane, and propane) are trapped in cages formed by water molecules. , The Lingshui gas field in the South China Sea is approaching production with a water depth of 1252.2–1530.5 m. The high-pressure and low-temperature environment of the deep water is prone to hydrate formation, causing pipeline blockages. − Once blockage occurs, the production will be jeopardized, causing huge economic losses and may even lead to serious accidents and casualties. − Therefore, hydrate blockage prevention is of great significance in the development of the Lingshui gas field. − …”

Section: Introductionmentioning

confidence: 99%

Investigation on Hydrate Formation and Viscosity of the Gas–Water System in Lingshui Gas Field of South China Sea

et al. 2023

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With gas production moving into the deep sea, the prediction of hydrate formation and blockage prevention are of great significance in flow assurance. In this work, hydrate formation experiments at a wide range of pressures and temperatures based on the production conditions of the Lingshui gas field were conducted by a high-pressure rheometer, and the evolution of viscosity was investigated. The experimental results showed that the slurry viscosity changed in stages during the formation of the hydrate, and the aggregation of hydrate particles was the essential cause of the significant increase in viscosity. The more severe the temperature and pressure conditions, the faster the hydrate formation and the greater the tendency of increasing viscosity. In experiments, the formation of hydrates would lead to severe blockages when the pressure exceeded 10 MPa. Compared with 100 and 300 rpm, the average hydrate formation rate was the fastest at 200 rpm. In addition, the relationship between hydrate volume fraction and viscosity was analyzed, and a critical hydrate volume fraction was proposed for a sharp increase in viscosity, which had a low value at high pressures and low temperatures and tended to cause blockages. This study can provide helpful theoretical support for hydrate formation prediction and blockage prevention in natural gas production.

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“…Clathrate hydrates are crystalline water‐based inclusion compounds with gas molecules trapped in the cavities formed by the ice–water networks. They have been extensively studied due to their technological applications 1–35 . For example, the CO 2 clathrate hydrates are of interest driven by their potential use in CO 2 gas capture and storage from the Earth's atmosphere, and control climate change, 36–38 while in an astrophysical context their formation and presence could influence the composition and stability of planetary ices and comets 39–41 .…”

Section: Introductionmentioning

confidence: 99%

Confining CO₂ inside sI clathrate‐hydrates: The impact of the CO₂–water interaction on quantized dynamics

2023

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We report new results on the translational‐rotational (T‐R) states of the CO2 molecule inside the sI clathrate‐hydrate cages. We adopted the multiconfiguration time‐dependent Hartree methodology to solve the nuclear molecular Hamiltonian, and to address issues on the T‐R couplings. Motivated by experimental X‐ray observations on the CO2 orientation in the D and T sI cages, we aim to evaluate the effect of the CO2–water interaction on quantum dynamics. Thus, we first compared semiempirical and ab initio‐based pair interaction model potentials against first‐principles DFT‐D calculations for ascertaining the importance of nonadditive many‐body effects on such guest–host interactions. Our results reveal that the rotational and translational excited states quantum dynamics is remarkably different, with the pattern and density of states clearly affected by the underlying potential model. By analyzing the corresponding the probability density distributions of the calculated T‐R eigenstates on both semiempirical and ab initio pair CO2–water nanocage potentials, we have extracted information on the altered CO2 guest local structure, and we discussed it in connection with experimental data on the orientation of the CO2 molecule in the D and T sI clathrate cages available from neutron diffraction and 13C solid‐state NMR studies, as well as in comparison with previous molecular dynamics simulations. Our calculations provide a very sensitive test of the potential quality by predicting the low‐lying T‐R states and corresponding transitions for the encapsulated CO2 molecule. As such spectroscopic observables have not been measured so far, our results could trigger further detailed experimental and theoretical investigations leading to a quantitative description of the present guest–host interactions.

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The Development of Clathrate Hydrate Science

Cited by 20 publications

References 227 publications

2022 Pioneers in Energy Research: John Ripmeester

2022 Pioneers in Energy Research: John Ripmeester

Investigation on Hydrate Formation and Viscosity of the Gas–Water System in Lingshui Gas Field of South China Sea

Confining CO₂ inside sI clathrate‐hydrates: The impact of the CO₂–water interaction on quantized dynamics

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The Development of Clathrate Hydrate Science

Cited by 20 publications

References 227 publications

2022 Pioneers in Energy Research: John Ripmeester

2022 Pioneers in Energy Research: John Ripmeester

Investigation on Hydrate Formation and Viscosity of the Gas–Water System in Lingshui Gas Field of South China Sea

Confining CO2 inside sI clathrate‐hydrates: The impact of the CO2–water interaction on quantized dynamics

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Confining CO₂ inside sI clathrate‐hydrates: The impact of the CO₂–water interaction on quantized dynamics