{"id":112369,"date":"2024-08-22T16:33:44","date_gmt":"2024-08-22T14:33:44","guid":{"rendered":"https:\/\/www.immo-invest.ch\/eindaemmung-von-hfc-23-emissionen\/"},"modified":"2024-08-22T16:36:07","modified_gmt":"2024-08-22T14:36:07","slug":"eindaemmung-von-hfc-23-emissionen","status":"publish","type":"post","link":"https:\/\/www.immo-invest.ch\/fr\/eindaemmung-von-hfc-23-emissionen\/","title":{"rendered":"Contr\u00f4le des \u00e9missions de HFC-23"},"content":{"rendered":"\n\n<p class=\"wp-block-paragraph\">Les hydrofluorocarbures (HFC) font partie des gaz \u00e0 effet de serre les plus puissants, et le HFC-23 est le plus puissant d&rsquo;entre eux. Un kilogramme de HFC-23 provoque dans l&rsquo;atmosph\u00e8re le m\u00eame r\u00e9chauffement que 12.000 kilogrammes de CO\u2082 et reste dans l&rsquo;atmosph\u00e8re pendant environ 200 ans. Dans le cadre de l&rsquo;amendement de Kigali au Protocole de Montr\u00e9al, plus de 150 pays se sont engag\u00e9s \u00e0 r\u00e9duire drastiquement les \u00e9missions de HFC-23. Les principales sources de ce gaz sont la production industrielle de r\u00e9frig\u00e9rants et de polyt\u00e9trafluoro\u00e9th\u00e8ne (PTFE), plus connu sous le nom de t\u00e9flon.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">Depuis 2020, les fabricants de t\u00e9flon sont tenus de d\u00e9truire le HFC-23 avant qu&rsquo;il ne soit rejet\u00e9 dans l&rsquo;atmosph\u00e8re. Les \u00e9missions d\u00e9clar\u00e9es montrent des progr\u00e8s. en 2020, les donn\u00e9es officielles indiquent que seulement 2.000 tonnes de HFC-23 ont \u00e9t\u00e9 \u00e9mises dans le monde. Cependant, les mesures r\u00e9elles indiquent environ 16.000 tonnes, ce qui r\u00e9v\u00e8le un \u00e9cart consid\u00e9rable.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nouvelles connaissances gr\u00e2ce aux mesures de gaz traceur<br><\/strong>Pour expliquer cette diff\u00e9rence, des chercheurs de l&rsquo;Empa, de l&rsquo;Universit\u00e9 de Bristol et du TNO ont \u00e9tudi\u00e9 les \u00e9missions de HFC-23 d&rsquo;une usine de t\u00e9flon aux Pays-Bas. Leurs r\u00e9sultats, publi\u00e9s dans la revue scientifique Nature, reposent sur une m\u00e9thode innovante. Les chercheurs ont lib\u00e9r\u00e9 un gaz traceur qui n&rsquo;est pas pr\u00e9sent dans l&rsquo;atmosph\u00e8re et qui se d\u00e9grade rapidement. Ils ont enregistr\u00e9 les concentrations de HFC-23 \u00e0 25 kilom\u00e8tres de distance et les ont compar\u00e9es aux valeurs du traceur. De cette mani\u00e8re, ils ont pu calculer avec pr\u00e9cision les \u00e9missions r\u00e9elles de l&rsquo;usine.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">Les r\u00e9sultats montrent que les \u00e9missions de l&rsquo;usine sont plus \u00e9lev\u00e9es que les chiffres d\u00e9clar\u00e9s, mais qu&rsquo;elles restent faibles. \u00ab\u00a0Les mesures de confinement fonctionnent bien, mais il y a un potentiel d&rsquo;optimisation\u00a0\u00bb, explique Martin Vollmer de l&rsquo;Empa. Le co-auteur Kieran Stanley de l&rsquo;Universit\u00e9 de Bristol r\u00e9sume : \u00ab\u00a0Les r\u00e9sultats sont encourageants et montrent que les \u00e9missions de HFC-23 peuvent \u00eatre consid\u00e9rablement r\u00e9duites avec les bonnes mesures\u00a0\u00bb<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D\u00e9fis mondiaux pour la r\u00e9duction du HFC-23<br><\/strong>L&rsquo;\u00e9tude met en \u00e9vidence le fait que le contr\u00f4le du HFC-23 est techniquement possible, mais qu&rsquo;il n&rsquo;est pas appliqu\u00e9 de mani\u00e8re coh\u00e9rente partout. \u00ab\u00a0Les \u00e9missions \u00e9lev\u00e9es mesur\u00e9es dans l&rsquo;atmosph\u00e8re indiquent que les mesures rapport\u00e9es ne correspondent pas toujours \u00e0 la r\u00e9alit\u00e9\u00a0\u00bb, avertit Vollmer. Les chercheurs appellent \u00e0 des v\u00e9rifications ind\u00e9pendantes des \u00e9missions provenant de la production de polym\u00e8res fluor\u00e9s et de r\u00e9frig\u00e9rants afin de combler les lacunes dans la compr\u00e9hension des sources d&rsquo;\u00e9missions et de s&rsquo;assurer que les accords internationaux sur le climat sont respect\u00e9s.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prochaines \u00e9tapes de la recherche<br><\/strong>En octobre 2024, une autre \u00e9tude sera men\u00e9e \u00e0 S\u00e9oul pour mesurer les \u00e9missions de substances halog\u00e9n\u00e9es dans la capitale sud-cor\u00e9enne. Cette m\u00e9thode pourrait \u00e9galement \u00eatre utile pour la surveillance d&rsquo;autres gaz \u00e0 effet de serre. \u00ab\u00a0Une surveillance continue et des mesures pr\u00e9cises nous permettront de mieux identifier les sources d&rsquo;\u00e9mission et de concevoir des mesures de r\u00e9duction des \u00e9missions plus efficaces\u00a0\u00bb, explique Arnoud Frumau de TNO.<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Des chercheurs de l&rsquo;Empa, de l&rsquo;Universit\u00e9 de Bristol et du TNO ont \u00e9tudi\u00e9 les \u00e9missions de HFC-23, un gaz extr\u00eamement nocif pour le climat, provenant de la production de t\u00e9flon et de r\u00e9frig\u00e9rants. Malgr\u00e9 des \u00e9volutions positives, leurs r\u00e9sultats montrent que les mesures de r\u00e9duction globales ne sont pas encore appliqu\u00e9es \u00e0 grande \u00e9chelle.<\/p>\n","protected":false},"author":2,"featured_media":112364,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[22699,8747],"tags":[46266,49225,4857],"class_list":["post-112369","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-durabilite","category-energie","tag-emissionsreduktion-fr","tag-hfc-23-fr","tag-klimawandel-fr"],"acf":{"bild_mit_ki_erstellt_worden":[],"lead":"Des chercheurs de l'Empa, de l'Universit\u00e9 de Bristol et du TNO ont \u00e9tudi\u00e9 les \u00e9missions de HFC-23, un gaz extr\u00eamement nocif pour le climat, provenant de la production de t\u00e9flon et de r\u00e9frig\u00e9rants. Malgr\u00e9 des \u00e9volutions positives, leurs r\u00e9sultats montrent que les mesures de r\u00e9duction globales ne sont pas encore appliqu\u00e9es \u00e0 grande \u00e9chelle.","autor":"Quelle Empa","ort":"","bildunterschrift":"","zusammenfassung":"","bild_im_grid":false,"gallerie":"","newsim":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Des chercheurs de l&#039;Empa, de l&#039;Universit\u00e9 de Bristol et du TNO ont \u00e9tudi\u00e9 les \u00e9missions de HFC-23, un gaz extr\u00eamement nocif pour le climat, provenant de la production de t\u00e9flon et de r\u00e9frig\u00e9rants. Malgr\u00e9 des \u00e9volutions positives, leurs r\u00e9sultats montrent que les mesures de r\u00e9duction globales ne sont pas encore appliqu\u00e9es \u00e0 grande \u00e9chelle.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"immovestuser\"\/>\n\t<meta name=\"google-site-verification\" content=\"fHJKvgWpZCR2zVBHWfkQeFXC11qieUSff0HGNYfuyLA\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.immo-invest.ch\/fr\/eindaemmung-von-hfc-23-emissionen\/\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"fr_FR\" \/>\n\t\t<meta property=\"og:site_name\" content=\"immo!nvest - Die Plattform f\u00fcr Standorte und Immobilien - Die\u00a0Plattform f\u00fcr Standorte und Immobilien\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Contr\u00f4le des \u00e9missions de HFC-23 - immo!nvest - Die Plattform f\u00fcr Standorte und Immobilien\" \/>\n\t\t<meta property=\"og:description\" content=\"Des chercheurs de l&#039;Empa, de l&#039;Universit\u00e9 de Bristol et du TNO ont \u00e9tudi\u00e9 les \u00e9missions de HFC-23, un gaz extr\u00eamement nocif pour le climat, provenant de la production de t\u00e9flon et de r\u00e9frig\u00e9rants. 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