{"id":1152,"date":"2021-08-21T00:00:55","date_gmt":"2021-08-21T00:00:55","guid":{"rendered":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/?p=1152"},"modified":"2021-08-20T23:08:10","modified_gmt":"2021-08-20T23:08:10","slug":"lavion-a-hydrogene-une-vraie-fausse-promesse-ecologique","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/sao-tome-e-principe\/toutes-les-actualites\/lavion-a-hydrogene-une-vraie-fausse-promesse-ecologique","title":{"rendered":"L&rsquo;avion \u00e0 hydrog\u00e8ne, une vraie fausse promesse \u00e9cologique ?"},"content":{"rendered":"<p><span style=\"color: #ff6600\"><strong><a href=\"https:\/\/www.africa-press.net\/\">Africa-Press<\/a> &#8211; <a href=\"https:\/\/www.africa-press.net\/sao-tome-e-principe\">S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/a>. <\/strong><\/span><b>C&rsquo;est l&rsquo;\u00e9l\u00e9ment le plus abondant sur Terre : l&rsquo;hydrog\u00e8ne. Pourrait-il alimenter des avions de ligne sans \u00e9missions de Co2 d&rsquo;ici 2035 ? C&rsquo;est la promesse faite par Airbus alors que le secteur de l&rsquo;aviation est confront\u00e9 \u00e0 une crise sans pr\u00e9c\u00e9dent depuis la pand\u00e9mie de Covid-19 et les appels \u00e0 une relance verte. Mais l&rsquo;hydrog\u00e8ne est un produit gourmand en \u00e9nergie et volumineux \u00e0 stocker. Est-ce donc une promesse viable ?<\/b><\/p>\n<p>Airbus a fait la une des journaux en annon\u00e7ant en septembre son projet d\u2019avion z\u00e9ro \u00e9mission dans les quinze prochaines ann\u00e9es. Trois \u00ab\u00a0concept planes\u00a0\u00bb ont \u00e9t\u00e9 pr\u00e9sent\u00e9s, dont le plus prometteur est une \u00ab\u00a0aile volante\u00a0\u00bb. Tous seraient aliment\u00e9s \u00e0 l&rsquo;hydrog\u00e8ne.<\/p>\n<p>Jean-Brice Dumont, directeur de l&rsquo;ing\u00e9nierie d&rsquo;Airbus, reconna\u00eet que l&rsquo;hydrog\u00e8ne utilis\u00e9 doit \u00eatre vert, \u00ab\u00a0sinon on a perdu dans la production d\u2019hydrog\u00e8ne qui \u00e9mettra du dioxyde de carbone ce qu\u2019on a gagn\u00e9 dans l\u2019avion, donc c\u2019est un peu hypocrite\u00a0\u00bb.<\/p>\n<p><b>Des chiffres vertigineux<\/b><\/p>\n<p>La fa\u00e7on la plus propre de produire de l&rsquo;hydrog\u00e8ne est via l\u2019\u00e9lectrolyse de l&rsquo;eau, qui s\u00e9pare les atomes d&rsquo;hydrog\u00e8ne et d&rsquo;oxyg\u00e8ne dans une mol\u00e9cule d&rsquo;eau. Mais pour que l&rsquo;hydrog\u00e8ne soit consid\u00e9r\u00e9 comme vert, l&rsquo;\u00e9lectricit\u00e9 utilis\u00e9e dans le processus doit provenir de sources renouvelables.<\/p>\n<p>Un collectif de chercheurs a fait les calculs pour estimer la quantit\u00e9 d&rsquo;\u00e9lectricit\u00e9 n\u00e9cessaire pour l\u2019a\u00e9roport de Roissy, le plus gros de France. L&rsquo;astrophysicien Mickael Coriat parle de chiffres vertigineux : \u00ab\u00a0Il faudrait couvrir 5 000 km\u00b2 d\u2019\u00e9oliennes, ce qui correspond \u00e0 la taille d\u2019un d\u00e9partement fran\u00e7ais entier. Converti en panneaux photovolta\u00efques, \u00e7a voudrait dire 1 000 km\u00b2 de panneaux photovolta\u00efques. Et si on d\u00e9cide d\u2019utiliser l\u2019\u00e9nergie nucl\u00e9aire \u00e0 la place, il faudrait utiliser 16 r\u00e9acteurs nucl\u00e9aires pour alimenter l\u2019a\u00e9roport Roissy-Charles-de-Gaulle\u00a0\u00bb.<\/p>\n<p><b>L&rsquo;horizon 2035, trop tard ?<\/b><\/p>\n<p>Selon les militants \u00e9cologistes, la promesse d&rsquo;avions \u00e0 hydrog\u00e8ne est un leurre cr\u00e9\u00e9 par l\u2019industrie de l\u2019aviation pour ne pas r\u00e9duire imm\u00e9diatement le trafic a\u00e9rien. Pour eux, 2035 est une date bien trop \u00e9loign\u00e9e pour un premier avion commercial \u00e0 hydrog\u00e8ne. Il faudrait d\u2019ailleurs rajouter de nombreuses ann\u00e9es pour que des flottes enti\u00e8res et des infrastructures a\u00e9roportuaires du monde entier s&rsquo;adaptent.<\/p>\n<p>Ces derniers mois, des militants ont d\u2019ailleurs d\u00e9ploy\u00e9 les grands moyens, envahissant les tarmacs des a\u00e9roports du monde entier pour demander une r\u00e9duction drastique du trafic a\u00e9rien. \u00c0 l&rsquo;a\u00e9roport d&rsquo;Orly, au sud de Paris, les manifestants ont franchi les cl\u00f4tures de l&rsquo;a\u00e9roport, rapidement arr\u00eat\u00e9s par la police.<\/p>\n<p>La porte-parole de l&rsquo;association Alternatiba, Pauline Boyer, n&rsquo;est pas mont\u00e9e \u00e0 bord d&rsquo;un avion depuis sept ans. Elle affirme que c&rsquo;est un sacrifice n\u00e9cessaire pour prot\u00e9ger la plan\u00e8te. \u00ab\u00a0Pour l&rsquo;instant et \u00e0 tr\u00e8s court terme, il n\u2019y a pas d\u2019avion \u00e9cologique qui permettrait de continuer sur la trajectoire actuelle d\u2019augmentation du trafic a\u00e9rien\u00a0\u00bb, explique-t-elle. \u00ab\u00a0Aujourd\u2019hui, c\u2019est l\u2019usage de l\u2019avion qu\u2019il faut repenser en m\u00eame temps que la r\u00e9organisation globale de la soci\u00e9t\u00e9.\u00a0\u00bb<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Africa-Press &#8211; S\u00e3o Tom\u00e9 e Pr\u00edncipe. C&rsquo;est l&rsquo;\u00e9l\u00e9ment le plus abondant sur Terre : l&rsquo;hydrog\u00e8ne. Pourrait-il alimenter des avions de ligne sans \u00e9missions de Co2 d&rsquo;ici 2035 ? C&rsquo;est la promesse faite par Airbus alors que le secteur de l&rsquo;aviation est confront\u00e9 \u00e0 une crise sans pr\u00e9c\u00e9dent depuis la pand\u00e9mie de Covid-19 et les appels [&hellip;]<\/p>\n","protected":false},"author":82,"featured_media":1151,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,20,10],"tags":[36,55,162,163,105,104,97,56],"class_list":["post-1152","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-top-nouvelles","category-toutes-les-actualites","tag-africa-press","tag-africa-press-sao-tome-e-principe","tag-airbus","tag-aviation","tag-ecologie","tag-environnement","tag-pollution","tag-sao-tome-e-principe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v26.1 (Yoast SEO v27.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>L&#039;avion \u00e0 hydrog\u00e8ne, une vraie fausse promesse \u00e9cologique ? - S\u00e3o Tom\u00e9 e Pr\u00edncipe<\/title>\n<meta name=\"description\" content=\"C&#039;est l&#039;\u00e9l\u00e9ment le plus abondant sur Terre : l&#039;hydrog\u00e8ne. 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