Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions

International audience Clathrate hydrates are emerging as a novel storage medium for safe and compact methane storage. However, their industrial-scale applicability is hindered by sluggish formation kinetics and intense energy cooling requirements. The present study is the first report on binary met...

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Main Authors: Omran, Ahmed, Valtchev, Valentin, Nesterenko, Nikolay
Other Authors: Centre National de la Recherche Scientifique (CNRS), Laboratoire catalyse et spectrochimie (LCS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS), Normandie Université (NU), TotalEnergies SE
Format: Conference Object
Language:English
Published: HAL CCSD 2022
Subjects:
Online Access:https://hal.science/hal-04251647
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spelling ftnormandieuniv:oai:HAL:hal-04251647v1 2024-04-14T08:14:53+00:00 Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions Omran, Ahmed Valtchev, Valentin Nesterenko, Nikolay Centre National de la Recherche Scientifique (CNRS) Laboratoire catalyse et spectrochimie (LCS) Université de Caen Normandie (UNICAEN) Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN) Normandie Université (NU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS) Normandie Université (NU) TotalEnergies SE 2022-11-29 https://hal.science/hal-04251647 en eng HAL CCSD hal-04251647 https://hal.science/hal-04251647 https://hal.science/hal-04251647 2022 [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry info:eu-repo/semantics/other Proceedings 2022 ftnormandieuniv 2024-03-21T16:27:36Z International audience Clathrate hydrates are emerging as a novel storage medium for safe and compact methane storage. However, their industrial-scale applicability is hindered by sluggish formation kinetics and intense energy cooling requirements. The present study is the first report on binary methane-tetrahydrofuran (THF) formation using seawater and an unstirred reactor at ambient temperature (298.2 K) that would improve the process economics. Acidic zeolites with different Si/Al ratios (USY-40 and USY-10) as well as aliphatic (L-valine) and aromatic (L-tryptophane) amino acids are employed as environmentally benign kinetic hydrate promoters. The experimental study is combined with DFT calculations to shed light on the role of kinetic promoters in hydrate formation. The set of experimental data revealed that hydrophobic zeolites with a higher Si/Al ratio performed better than the more hydrophilic ones. Moreover, the aliphatic amino acid L-valine showed better kinetic promotion performance for hydrate formation in natural and artificial seawater than the aromatic amino acid L-tryptophan. The optimization of the experimental condition allowed a controlled hydrate growth boosting the gas uptake to 40 mmol gas/mol water, which is the highest reported under mild conditions using seawater. In addition, the induction time is reduced to less than 10 minutes, and a methane recovery of 97% is reached without any foaming signs. Thus, this study demonstrates the possibility of controlling the stochastic nature of nucleation and hydrate growth by properly manipulating the reaction system. Our results provide a better understanding of hydrate nucleation enhancement under realistic conditions and open the door for a possible application of these environmentally benign KHPs for synthetic natural gas (SGH) on a continuous process and industrial scale. Conference Object Methane hydrate Normandie Université: HAL
institution Open Polar
collection Normandie Université: HAL
op_collection_id ftnormandieuniv
language English
topic [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
spellingShingle [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
Omran, Ahmed
Valtchev, Valentin
Nesterenko, Nikolay
Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions
topic_facet [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
description International audience Clathrate hydrates are emerging as a novel storage medium for safe and compact methane storage. However, their industrial-scale applicability is hindered by sluggish formation kinetics and intense energy cooling requirements. The present study is the first report on binary methane-tetrahydrofuran (THF) formation using seawater and an unstirred reactor at ambient temperature (298.2 K) that would improve the process economics. Acidic zeolites with different Si/Al ratios (USY-40 and USY-10) as well as aliphatic (L-valine) and aromatic (L-tryptophane) amino acids are employed as environmentally benign kinetic hydrate promoters. The experimental study is combined with DFT calculations to shed light on the role of kinetic promoters in hydrate formation. The set of experimental data revealed that hydrophobic zeolites with a higher Si/Al ratio performed better than the more hydrophilic ones. Moreover, the aliphatic amino acid L-valine showed better kinetic promotion performance for hydrate formation in natural and artificial seawater than the aromatic amino acid L-tryptophan. The optimization of the experimental condition allowed a controlled hydrate growth boosting the gas uptake to 40 mmol gas/mol water, which is the highest reported under mild conditions using seawater. In addition, the induction time is reduced to less than 10 minutes, and a methane recovery of 97% is reached without any foaming signs. Thus, this study demonstrates the possibility of controlling the stochastic nature of nucleation and hydrate growth by properly manipulating the reaction system. Our results provide a better understanding of hydrate nucleation enhancement under realistic conditions and open the door for a possible application of these environmentally benign KHPs for synthetic natural gas (SGH) on a continuous process and industrial scale.
author2 Centre National de la Recherche Scientifique (CNRS)
Laboratoire catalyse et spectrochimie (LCS)
Université de Caen Normandie (UNICAEN)
Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN)
Normandie Université (NU)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)
Normandie Université (NU)
TotalEnergies SE
format Conference Object
author Omran, Ahmed
Valtchev, Valentin
Nesterenko, Nikolay
author_facet Omran, Ahmed
Valtchev, Valentin
Nesterenko, Nikolay
author_sort Omran, Ahmed
title Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions
title_short Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions
title_full Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions
title_fullStr Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions
title_full_unstemmed Green Kinetic Promoters for Seawater-based Methane Hydrate Formation at Economic Conditions
title_sort green kinetic promoters for seawater-based methane hydrate formation at economic conditions
publisher HAL CCSD
publishDate 2022
url https://hal.science/hal-04251647
genre Methane hydrate
genre_facet Methane hydrate
op_source https://hal.science/hal-04251647
2022
op_relation hal-04251647
https://hal.science/hal-04251647
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