Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane
292 pages In the offshore exploitation of liquid fuels, problems of line plugging often occur, especially due to gas hydrates crystallization. At the present time, operators resort to antifreeze additives, which efficiency is defeated either by harder operating conditions or by a more severe environ...
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ftunivnantes:oai:HAL:tel-00820320v1 2023-05-15T17:12:12+02:00 Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane Pic, Jean-Stéphane Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE) École des Mines de Saint-Étienne (Mines Saint-Étienne MSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) Laboratoire des Procédés en Milieux Granulaires (LPMG-EMSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS) Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation (GENERIC-ENSMSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-SPIN Ecole Nationale Supérieure des Mines de Saint-Etienne Michel Cournil(cournil@emse.fr) 2000-01-14 https://theses.hal.science/tel-00820320 https://theses.hal.science/tel-00820320/document https://theses.hal.science/tel-00820320/file/20000114-Pic-JS.pdf fr fre HAL CCSD tel-00820320 https://theses.hal.science/tel-00820320 https://theses.hal.science/tel-00820320/document https://theses.hal.science/tel-00820320/file/20000114-Pic-JS.pdf info:eu-repo/semantics/OpenAccess https://theses.hal.science/tel-00820320 Génie des procédés. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2000. Français. ⟨NNT : ⟩ PSD particle size distribution nucleation gas hydrates kinetic inhibitors crystallization antifreeze additives turbidimetric sensor hydrates de gaz inhibiteur cristallisation turbidimétrie polyvinylpyrrolidone PVP germination [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering info:eu-repo/semantics/doctoralThesis Theses 2000 ftunivnantes 2023-03-01T00:04:56Z 292 pages In the offshore exploitation of liquid fuels, problems of line plugging often occur, especially due to gas hydrates crystallization. At the present time, operators resort to antifreeze additives, which efficiency is defeated either by harder operating conditions or by a more severe environmental legislation. So research recently shifted towards a new class of "low dosage inhibitors". In order to understand the influence of such additives, we designed a high pressure reactor, fitted with a liquid injection device and an in situ . turbidimetric sensor. Access to both the particle size distribution (PSD) of the suspension during the first stages of crystallization, and the total gas consumption, allows us to characterize the kinetics of methane hydrate formation. First, we developed an original experimental procedure, which generates an initial "breeding" of the solution, and thus improves the mastering of nucleation. The induction time then becomes one of the relevant parameters to investigate the performance of inhibitors. Afterwards, we performed a first series of experiments which allowed us to determine the influence of the operating conditions (pressure and stirring) on the evolution of the PSD, in the absence of additives. Then, we pointed out the inhibiting effect of a model kinetic inhibitor, PolyVinylPyrrolidone (PVP). When dissolved in the solution before crystallisation occurs, it increases the induction delay, decreases the gas consumption rate and also slows down the birth of new particles for several hours. On the contrary, when injected in the medium during crystallization, this polymer no more affects the reaction kinetics. At last, we raise the bases for a modelling, taking into account the elementary crystallization processes of nucleation, growth and particles agglomeration. A parametric study has been confronted to the experimental data. It enables us to suggest hypotheses regarding the effect of gas hydrates kinetic inhibitors. L'exploitation de gisements pétroliers off shore ... Doctoral or Postdoctoral Thesis Methane hydrate Université de Nantes: HAL-UNIV-NANTES |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
French |
topic |
PSD particle size distribution nucleation gas hydrates kinetic inhibitors crystallization antifreeze additives turbidimetric sensor hydrates de gaz inhibiteur cristallisation turbidimétrie polyvinylpyrrolidone PVP germination [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering |
spellingShingle |
PSD particle size distribution nucleation gas hydrates kinetic inhibitors crystallization antifreeze additives turbidimetric sensor hydrates de gaz inhibiteur cristallisation turbidimétrie polyvinylpyrrolidone PVP germination [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Pic, Jean-Stéphane Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
topic_facet |
PSD particle size distribution nucleation gas hydrates kinetic inhibitors crystallization antifreeze additives turbidimetric sensor hydrates de gaz inhibiteur cristallisation turbidimétrie polyvinylpyrrolidone PVP germination [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering |
description |
292 pages In the offshore exploitation of liquid fuels, problems of line plugging often occur, especially due to gas hydrates crystallization. At the present time, operators resort to antifreeze additives, which efficiency is defeated either by harder operating conditions or by a more severe environmental legislation. So research recently shifted towards a new class of "low dosage inhibitors". In order to understand the influence of such additives, we designed a high pressure reactor, fitted with a liquid injection device and an in situ . turbidimetric sensor. Access to both the particle size distribution (PSD) of the suspension during the first stages of crystallization, and the total gas consumption, allows us to characterize the kinetics of methane hydrate formation. First, we developed an original experimental procedure, which generates an initial "breeding" of the solution, and thus improves the mastering of nucleation. The induction time then becomes one of the relevant parameters to investigate the performance of inhibitors. Afterwards, we performed a first series of experiments which allowed us to determine the influence of the operating conditions (pressure and stirring) on the evolution of the PSD, in the absence of additives. Then, we pointed out the inhibiting effect of a model kinetic inhibitor, PolyVinylPyrrolidone (PVP). When dissolved in the solution before crystallisation occurs, it increases the induction delay, decreases the gas consumption rate and also slows down the birth of new particles for several hours. On the contrary, when injected in the medium during crystallization, this polymer no more affects the reaction kinetics. At last, we raise the bases for a modelling, taking into account the elementary crystallization processes of nucleation, growth and particles agglomeration. A parametric study has been confronted to the experimental data. It enables us to suggest hypotheses regarding the effect of gas hydrates kinetic inhibitors. L'exploitation de gisements pétroliers off shore ... |
author2 |
Centre Sciences des Processus Industriels et Naturels (SPIN-ENSMSE) École des Mines de Saint-Étienne (Mines Saint-Étienne MSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT) Laboratoire des Procédés en Milieux Granulaires (LPMG-EMSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-Centre National de la Recherche Scientifique (CNRS) Département Géochimie, environnement, écoulement, réacteurs industriels et cristallisation (GENERIC-ENSMSE) Institut Mines-Télécom Paris (IMT)-Institut Mines-Télécom Paris (IMT)-SPIN Ecole Nationale Supérieure des Mines de Saint-Etienne Michel Cournil(cournil@emse.fr) |
format |
Doctoral or Postdoctoral Thesis |
author |
Pic, Jean-Stéphane |
author_facet |
Pic, Jean-Stéphane |
author_sort |
Pic, Jean-Stéphane |
title |
Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
title_short |
Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
title_full |
Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
title_fullStr |
Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
title_full_unstemmed |
Etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
title_sort |
etude du mécanisme d'action d'un inhibiteur cinétique sur la cristallisation de l'hydrate de méthane |
publisher |
HAL CCSD |
publishDate |
2000 |
url |
https://theses.hal.science/tel-00820320 https://theses.hal.science/tel-00820320/document https://theses.hal.science/tel-00820320/file/20000114-Pic-JS.pdf |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
https://theses.hal.science/tel-00820320 Génie des procédés. Ecole Nationale Supérieure des Mines de Saint-Etienne, 2000. Français. ⟨NNT : ⟩ |
op_relation |
tel-00820320 https://theses.hal.science/tel-00820320 https://theses.hal.science/tel-00820320/document https://theses.hal.science/tel-00820320/file/20000114-Pic-JS.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766068998567362560 |