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...
Main Authors: | , , |
---|---|
Other Authors: | , , , , , , |
Format: | Conference Object |
Language: | English |
Published: |
HAL CCSD
2022
|
Subjects: | |
Online Access: | https://hal.science/hal-04251647 |
id |
ftnormandieuniv:oai:HAL:hal-04251647v1 |
---|---|
record_format |
openpolar |
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 |
_version_ |
1796313130798678016 |