{"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":"<p class=\"wp-block-paragraph\">Les hydrofluorocarbures (HFC) font partie des gaz &agrave; 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&egrave;re le m&ecirc;me r&eacute;chauffement que 12.000 kilogrammes de CO&#8322; et reste dans l&rsquo;atmosph&egrave;re pendant environ 200 ans. Dans le cadre de l&rsquo;amendement de Kigali au Protocole de Montr&eacute;al, plus de 150 pays se sont engag&eacute;s &agrave; r&eacute;duire drastiquement les &eacute;missions de HFC-23. Les principales sources de ce gaz sont la production industrielle de r&eacute;frig&eacute;rants et de polyt&eacute;trafluoro&eacute;th&egrave;ne (PTFE), plus connu sous le nom de t&eacute;flon.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">Depuis 2020, les fabricants de t&eacute;flon sont tenus de d&eacute;truire le HFC-23 avant qu&rsquo;il ne soit rejet&eacute; dans l&rsquo;atmosph&egrave;re. Les &eacute;missions d&eacute;clar&eacute;es montrent des progr&egrave;s. en 2020, les donn&eacute;es officielles indiquent que seulement 2.000 tonnes de HFC-23 ont &eacute;t&eacute; &eacute;mises dans le monde. Cependant, les mesures r&eacute;elles indiquent environ 16.000 tonnes, ce qui r&eacute;v&egrave;le un &eacute;cart consid&eacute;rable.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Nouvelles connaissances gr&acirc;ce aux mesures de gaz traceur<br><\/strong>Pour expliquer cette diff&eacute;rence, des chercheurs de l&rsquo;Empa, de l&rsquo;Universit&eacute; de Bristol et du TNO ont &eacute;tudi&eacute; les &eacute;missions de HFC-23 d&rsquo;une usine de t&eacute;flon aux Pays-Bas. Leurs r&eacute;sultats, publi&eacute;s dans la revue scientifique Nature, reposent sur une m&eacute;thode innovante. Les chercheurs ont lib&eacute;r&eacute; un gaz traceur qui n&rsquo;est pas pr&eacute;sent dans l&rsquo;atmosph&egrave;re et qui se d&eacute;grade rapidement. Ils ont enregistr&eacute; les concentrations de HFC-23 &agrave; 25 kilom&egrave;tres de distance et les ont compar&eacute;es aux valeurs du traceur. De cette mani&egrave;re, ils ont pu calculer avec pr&eacute;cision les &eacute;missions r&eacute;elles de l&rsquo;usine.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\">Les r&eacute;sultats montrent que les &eacute;missions de l&rsquo;usine sont plus &eacute;lev&eacute;es que les chiffres d&eacute;clar&eacute;s, mais qu&rsquo;elles restent faibles. &laquo;&nbsp;Les mesures de confinement fonctionnent bien, mais il y a un potentiel d&rsquo;optimisation&nbsp;&raquo;, explique Martin Vollmer de l&rsquo;Empa. Le co-auteur Kieran Stanley de l&rsquo;Universit&eacute; de Bristol r&eacute;sume : &laquo;&nbsp;Les r&eacute;sultats sont encourageants et montrent que les &eacute;missions de HFC-23 peuvent &ecirc;tre consid&eacute;rablement r&eacute;duites avec les bonnes mesures&nbsp;&raquo;<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>D&eacute;fis mondiaux pour la r&eacute;duction du HFC-23<br><\/strong>L&rsquo;&eacute;tude met en &eacute;vidence le fait que le contr&ocirc;le du HFC-23 est techniquement possible, mais qu&rsquo;il n&rsquo;est pas appliqu&eacute; de mani&egrave;re coh&eacute;rente partout. &laquo;&nbsp;Les &eacute;missions &eacute;lev&eacute;es mesur&eacute;es dans l&rsquo;atmosph&egrave;re indiquent que les mesures rapport&eacute;es ne correspondent pas toujours &agrave; la r&eacute;alit&eacute;&nbsp;&raquo;, avertit Vollmer. Les chercheurs appellent &agrave; des v&eacute;rifications ind&eacute;pendantes des &eacute;missions provenant de la production de polym&egrave;res fluor&eacute;s et de r&eacute;frig&eacute;rants afin de combler les lacunes dans la compr&eacute;hension des sources d&rsquo;&eacute;missions et de s&rsquo;assurer que les accords internationaux sur le climat sont respect&eacute;s.<\/p>\n\n\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Prochaines &eacute;tapes de la recherche<br><\/strong>En octobre 2024, une autre &eacute;tude sera men&eacute;e &agrave; S&eacute;oul pour mesurer les &eacute;missions de substances halog&eacute;n&eacute;es dans la capitale sud-cor&eacute;enne. Cette m&eacute;thode pourrait &eacute;galement &ecirc;tre utile pour la surveillance d&rsquo;autres gaz &agrave; effet de serre. &laquo;&nbsp;Une surveillance continue et des mesures pr&eacute;cises nous permettront de mieux identifier les sources d&rsquo;&eacute;mission et de concevoir des mesures de r&eacute;duction des &eacute;missions plus efficaces&nbsp;&raquo;, 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":{"pmpro_default_level":"","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","pmpro-has-access"],"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":"","bild_im_grid":false,"gallerie":"","newsim":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - 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<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\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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