{"id":19929,"date":"2025-10-21T17:50:31","date_gmt":"2025-10-21T15:50:31","guid":{"rendered":"https:\/\/navier-lab.fr\/?p=19929"},"modified":"2025-10-21T17:53:47","modified_gmt":"2025-10-21T15:53:47","slug":"soutenance-de-these-peyman-dehghani","status":"publish","type":"post","link":"https:\/\/navier-lab.fr\/en\/soutenance-de-these-peyman-dehghani\/","title":{"rendered":"PhD Defense \u2013 Peyman Dehghani"},"content":{"rendered":"<section class=\"kc-elm kc-css-608275 kc_row\"><div class=\"kc-row-container  kc-container\"><div class=\"kc-wrap-columns\"><div class=\"kc-elm kc-css-823184 kc_col-sm-12 kc_column kc_col-sm-12\"><div class=\"kc-col-container\"><div class=\"kc-elm kc-css-631266 kc_text_block\"><\/p>\n<p style=\"text-align: justify;\">Peyman Dehghani, a PhD candidate in the Geotechnics team, will defend his dissertation titled <em>&#8220;<\/em><em>Kinetics of CO\u2082 Hydrate Formation in Porous Media under Geological Storage Conditions<\/em><em>&#8220;<\/em> on <strong>Monday, October 27th, at 2:00 PM<\/strong>, in the Sequoia amphitheater at&nbsp;l&#8217;IFPEN (Rueil Malmaison).<\/p>\n<p class=\"x_MsoNoSpacing\"><strong>Composition of the jury:<\/strong><\/p>\n<div>\n<ul type=\"disc\">\n<li data-ogsc=\"black\"><span lang=\"fr\" data-olk-copy-source=\"MessageBody\">Prof. Daniel Broseta (Universit\u00e9 de Pau et des Pays de l&#8217;Adour) \u2013&nbsp;<\/span><span data-ogsc=\"\" data-olk-copy-source=\"MessageBody\">Reviewer<\/span><\/li>\n<li data-ogsc=\"black\"><span lang=\"fr\">Prof. Lionel Mercury (Universit\u00e9 d\u2019Orl\u00e9ans) \u2013&nbsp;<\/span><span data-ogsc=\"\" data-olk-copy-source=\"MessageBody\">Reviewer<\/span><\/li>\n<li data-ogsc=\"black\"><span lang=\"fr\">Dr. Anthony Delahaye (INRAE) \u2013 Examiner<\/span><\/li>\n<li data-ogsc=\"black\"><span lang=\"fr\">Dr. Anh Minh Tang (Ecole Nationale des Ponts et Chauss\u00e9es) \u2013&nbsp;<\/span><span data-ogsc=\"\">Supervisor<\/span><\/li>\n<li data-ogsc=\"black\"><span lang=\"fr\">Dr. Anne Sinquin (IFPEN) \u2013 Co-encadrante de th\u00e8se<\/span><\/li>\n<\/ul>\n<\/div>\n<p>The defense will be broadcasted live on Microsoft Teams. You can follow it here:&nbsp;<span lang=\"pt-BR\"><a href=\"https:\/\/teams.microsoft.com\/l\/meetup-join\/19%3ameeting_NDM3YjM2MWUtNmU3Mi00ZGY4LThiNDMtYjZlYjk1ZWFiN2Vi%40thread.v2\/0?context=%7b%22Tid%22%3a%228de15a81-f1b0-42ee-86ae-ca75c1b8ba65%22%2c%22Oid%22%3a%22431d4256-06a1-45d9-85d1-f57d0913c974%22%7d\">Teams link<\/a><br \/><\/span><\/p>\n<p>\n<\/div><div data-closeall=\"true\" class=\"kc-elm kc-css-781273 kc_accordion_wrapper\">\n    <h3 class=\"kc-accordion-title\">Abstract<\/h3>\n<div class=\"kc-elm kc-css-329206 kc_accordion_section group \"><h3 class=\"kc_accordion_header ui-accordion-header\"><span class=\"ui-accordion-header-icon ui-icon\"><\/span><a href=\"#show-the-abstract\" data-prevent=\"scroll\"><i class=\"\"><\/i> Show the abstract<\/a><\/h3><div class=\"kc_accordion_content ui-accordion-content kc_clearfix\"><div class=\"kc-panel-body\"><div class=\"kc-elm kc-css-212944 kc_text_block\"><\/p>\n<p style=\"text-align: justify;\">This study presents a comprehensive experimental investigation into the formation, propagation, and dissociation of CO\u2082 hydrates across multiple scales, ranging from pore-level microfluidics to sediment-scale coreflood systems, with direct implications for geological CO\u2082 storage. In the microfluidic experiments, two high-pressure chips with distinct geometries were employed: a serpentine chip, which facilitated the generation and observation of multiple CO\u2082 droplets and bubbles, and a trap chip, designed with 70 serially connected traps to immobilize droplets under controlled static and dynamic CO\u2082 flow conditions. The onset, growth, and propagation of hydrates were systematically analyzed under both gaseous and liquid CO\u2082 conditions. Using the serpentine chip, the effect of water salinity was systematically studied with varying NaCl concentrations under static conditions. The trap-chip experiments focused on the nucleation of hydrates within water droplets exposed to dynamic CO\u2082 flow.<\/p>\n<p style=\"text-align: justify;\">At the sediment scale, dynamic CO\u2082 injection experiments were conducted in a custom-designed sandpack cell equipped with pressure sensors, differential pressure sensors, and flow control systems. To characterize the internal state of the cell at various stages\u2014including after initial sand packing and saturation, hydrate formation, and hydrate dissociation\u2014medical CT scanning was utilized.<\/p>\n<p style=\"text-align: justify;\">This multi-scale approach establishes a mechanistic connection between hydrate formation observed in microfluidic systems and that occurring in porous sediments, offering valuable insights into the nucleation and growth of hydrates.<\/p>\n<p>\n<\/div><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><\/div><\/section>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":158,"featured_media":19931,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[266,251,291],"tags":[],"class_list":["post-19929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites-en","category-annonces-en","category-annonces-geotech-en"],"acf":[],"_links":{"self":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/posts\/19929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/users\/158"}],"replies":[{"embeddable":true,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/comments?post=19929"}],"version-history":[{"count":3,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/posts\/19929\/revisions"}],"predecessor-version":[{"id":19937,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/posts\/19929\/revisions\/19937"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/media\/19931"}],"wp:attachment":[{"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/media?parent=19929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/categories?post=19929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/navier-lab.fr\/en\/wp-json\/wp\/v2\/tags?post=19929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}