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Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders

Methane hydrates are promising materials for storage and transportation of natural gas; however, the slow kinetics and inefficient water to hydrate conversions impede its broad scale utilisation. The purpose of the present study is to demonstrate rapid (2–3 h) and efficient methane hydrate conversio...

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Autores principales: Prasad, Pinnelli S. R., Kiran, Burla Sai, Sowjanya, Kandadai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9053743/
https://www.ncbi.nlm.nih.gov/pubmed/35515598
http://dx.doi.org/10.1039/d0ra01754j
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author Prasad, Pinnelli S. R.
Kiran, Burla Sai
Sowjanya, Kandadai
author_facet Prasad, Pinnelli S. R.
Kiran, Burla Sai
Sowjanya, Kandadai
author_sort Prasad, Pinnelli S. R.
collection PubMed
description Methane hydrates are promising materials for storage and transportation of natural gas; however, the slow kinetics and inefficient water to hydrate conversions impede its broad scale utilisation. The purpose of the present study is to demonstrate rapid (2–3 h) and efficient methane hydrate conversions by utilising the water molecules confined in the intra- and inter-granular space of silica powders. All the experiments were conducted with amorphous silica (10 g) powders of 2–30 μm; 10–20 nm grain size, to mimic the hydrate formations in fine sand and clay dominated environments under moderate methane pressure (7–8 MPa). Encasing of methane molecules in hydrate cages was confirmed by Raman spectroscopic (ex situ) and thermodynamic phase boundary measurements. The present studies reveal that the water to hydrate conversion is relatively slower in 10–20 nm grain size silica, although the nucleation event is rapid in both silicas. The process of hydrate conversion is vastly diffusion-controlled, and this was distinctly observed during the hydrate growth in nanosize silica.
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spelling pubmed-90537432022-05-04 Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders Prasad, Pinnelli S. R. Kiran, Burla Sai Sowjanya, Kandadai RSC Adv Chemistry Methane hydrates are promising materials for storage and transportation of natural gas; however, the slow kinetics and inefficient water to hydrate conversions impede its broad scale utilisation. The purpose of the present study is to demonstrate rapid (2–3 h) and efficient methane hydrate conversions by utilising the water molecules confined in the intra- and inter-granular space of silica powders. All the experiments were conducted with amorphous silica (10 g) powders of 2–30 μm; 10–20 nm grain size, to mimic the hydrate formations in fine sand and clay dominated environments under moderate methane pressure (7–8 MPa). Encasing of methane molecules in hydrate cages was confirmed by Raman spectroscopic (ex situ) and thermodynamic phase boundary measurements. The present studies reveal that the water to hydrate conversion is relatively slower in 10–20 nm grain size silica, although the nucleation event is rapid in both silicas. The process of hydrate conversion is vastly diffusion-controlled, and this was distinctly observed during the hydrate growth in nanosize silica. The Royal Society of Chemistry 2020-05-07 /pmc/articles/PMC9053743/ /pubmed/35515598 http://dx.doi.org/10.1039/d0ra01754j Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Prasad, Pinnelli S. R.
Kiran, Burla Sai
Sowjanya, Kandadai
Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
title Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
title_full Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
title_fullStr Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
title_full_unstemmed Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
title_short Enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
title_sort enhanced methane gas storage in the form of hydrates: role of the confined water molecules in silica powders
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9053743/
https://www.ncbi.nlm.nih.gov/pubmed/35515598
http://dx.doi.org/10.1039/d0ra01754j
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