{"id":9741617,"date":"2023-09-11T11:58:09","date_gmt":"2023-09-11T10:58:09","guid":{"rendered":"https:\/\/kapitalis.com\/tunisie\/?p=9741617"},"modified":"2023-09-11T11:58:11","modified_gmt":"2023-09-11T10:58:11","slug":"les-mirages-de-lhydrogene-vert-en-tunisie","status":"publish","type":"post","link":"https:\/\/kapitalis.com\/tunisie\/2023\/09\/11\/les-mirages-de-lhydrogene-vert-en-tunisie\/","title":{"rendered":"Les mirages de l\u2019\u00abhydrog\u00e8ne vert\u00bb en Tunisie \u00a0\u00a0"},"content":{"rendered":"\n<p><strong><em>L\u2019hydrog\u00e8ne, qu\u2019on nous vante aujourd\u2019hui comme une \u00e9nergie alternative pour produire de l\u2019\u00e9lectricit\u00e9, n\u2019est peut-\u00eatre pas aussi verte que nous le pr\u00e9sentent les Europ\u00e9ens. Ces derniers veulent d\u00e9velopper cette technologie en Tunisie pour en faire un \u00e9l\u00e9ment cl\u00e9 pour la production et l\u2019exportation de \u00abl\u2019hydrog\u00e8ne vert\u00bb vers l\u2019Europe. Le but inavou\u00e9 \u00e9tant de baisser les \u00e9missions de carbone en Europe au prix d\u2019une destruction de l\u2019environnement au sud de la M\u00e9diterran\u00e9e. Explications\u2026<\/em><\/strong><\/p>\n\n\n\n<p>Par<strong> Imed Bahri<\/strong><\/p>\n\n\n\n<!--more-->\n\n\n\n<p>La Tunisie est l\u2019un des pays les plus secs d\u2019Afrique et vient de subir trois ann\u00e9es de s\u00e9cheresse. Pourtant, l\u2019UE consid\u00e8re que notre pays pourrait contribuer \u00e0 produire de l\u2019\u00e9lectricit\u00e9 \u00e0 partir de l\u2019hydrog\u00e8ne et l\u2019exporter vers l\u2019Europe. Le probl\u00e8me est que ce carburant est obtenu en divisant l\u2019eau en oxyg\u00e8ne et hydrog\u00e8ne avec de l\u2019\u00e9lectricit\u00e9 produite par des sources renouvelables. Mais le probl\u00e8me est que la Tunisie a beaucoup de soleil mais peu d\u2019eau douce.<\/p>\n\n\n\n<p>La seule mani\u00e8re de produire la mati\u00e8re premi\u00e8re n\u00e9cessaire \u00e0 l\u2019hydrog\u00e8ne vert est d\u2019aspirer l\u2019eau de la M\u00e9diterran\u00e9e et de la dessaler. Mais un rapport publi\u00e9 l\u2019ann\u00e9e derni\u00e8re pour la Fondation Heinrich B\u00f6ll, affili\u00e9e au mouvement politique vert allemand, pr\u00e9vient qu\u2019il s\u2019agirait d\u2019un processus sale, \u00e9nergivore et gourmand en eau \u2013 et qui ferait peser le co\u00fbt \u00e9lev\u00e9 de la d\u00e9carbonisation du monde riche sur les \u00e9paules des nations les plus pauvres.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Le carburant du futur<\/h2>\n\n\n\n<p>En d\u2019autres termes, les faibles \u00e9missions de carbone en Europe se feront demain au prix d\u2019une destruction de l\u2019environnement au sud de la M\u00e9diterran\u00e9e.<\/p>\n\n\n\n<p>De nombreux pays ensoleill\u00e9s, notamment au Maghreb, se sont vu vendre un avenir en tant que p\u00f4les d\u2019exportation de l\u2019hydrog\u00e8ne vert. Le pitch est s\u00e9duisant. \u00c9tant donn\u00e9 qu\u2019un kilo d\u2019hydrog\u00e8ne contient environ trois fois plus d\u2019\u00e9nergie qu\u2019un kilo d\u2019essence, il n\u2019est pas \u00e9tonnant que l\u2019hydrog\u00e8ne soit pr\u00e9sent\u00e9 comme le carburant du futur. Le pacte vert europ\u00e9en, qui vise \u00e0 r\u00e9duire les \u00e9missions de gaz \u00e0 effet de serre de 55% d\u2019ici la fin de la d\u00e9cennie, repose sur la production d\u2019hydrog\u00e8ne vert en Afrique du Nord et en Ukraine.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-kapitalis wp-block-embed-kapitalis\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"5YFZF46m7r\"><a href=\"https:\/\/kapitalis.com\/tunisie\/2023\/05\/26\/la-tunisie-peut-exporter-jusqua-6-millions-de-tonnes-dhydrogene-vert-vers-leurope\/\">La Tunisie peut exporter jusqu\u2019\u00e0 6 millions de tonnes d\u2019hydrog\u00e8ne vert vers l\u2019Europe<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"\u00ab\u00a0La Tunisie peut exporter jusqu\u2019\u00e0 6 millions de tonnes d\u2019hydrog\u00e8ne vert vers l\u2019Europe\u00a0\u00bb &#8212; Kapitalis\" src=\"https:\/\/kapitalis.com\/tunisie\/2023\/05\/26\/la-tunisie-peut-exporter-jusqua-6-millions-de-tonnes-dhydrogene-vert-vers-leurope\/embed\/#?secret=tQEnNJWNJE#?secret=5YFZF46m7r\" data-secret=\"5YFZF46m7r\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>Produire de l\u2019hydrog\u00e8ne vert en Europe n\u2019est pas impossible. Mais cela co\u00fbte cher par rapport aux combustibles fossiles, et m\u00eame la production \u00e9olienne n\u00e9cessite des subventions plus importantes. Sans d\u2019importantes mesures de soutien gouvernementales, la question reste ouverte de savoir si les consommateurs europ\u00e9ens seraient pr\u00eats \u00e0 supporter les hausses de prix tr\u00e8s importantes n\u00e9cessaires pour passer au vert de cette mani\u00e8re.<\/p>\n\n\n\n<p>L\u2019ann\u00e9e derni\u00e8re, l\u2019UE a propos\u00e9 de doubler les importations d\u2019hydrog\u00e8ne vert d\u2019ici 2030 pour atteindre 10 millions de tonnes par an. Les industries lourdes du continent ne peuvent pas utiliser l\u2019\u00e9lectricit\u00e9, m\u00eame respectueuse de l\u2019environnement, pour tous leurs besoins ; ils ont besoin de combustibles pour une chaleur \u00e0 haute intensit\u00e9. Alors pour s\u2019assurer que ces sources d\u2019\u00e9nergie soient moins carbon\u00e9es, Bruxelles pousse les industries \u2013 comme les fabricants d\u2019acier ou de p\u00e9trochimie \u2013 \u00e0 adopter l\u2019hydrog\u00e8ne vert.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">D\u00e9gradation des \u00e9cosyst\u00e8mes marins<\/h2>\n\n\n\n<p>Les b\u00e9n\u00e9fices d\u2019une telle strat\u00e9gie \u2013 avec l\u2019objectif souhaitable de faibles \u00e9missions de carbone en Europe \u2013 ne peuvent pas se faire au prix d\u2019une destruction de l\u2019environnement \u00e0 l\u2019\u00e9tranger. Raoudha Gafrej, l\u2019un des plus grands experts tunisiens de l\u2019eau, a averti dans le rapport de la Fondation Heinrich B\u00f6ll que la d\u00e9gradation des \u00e9cosyst\u00e8mes marins due aux boues toxiques produites par les usines de dessalement serait irr\u00e9versible.<\/p>\n\n\n\n<p>L\u2019hydrog\u00e8ne produit par les \u00e9nergies renouvelables a un r\u00f4le \u00e0 jouer dans les futurs syst\u00e8mes \u00e9nerg\u00e9tiques. Sa version <em>\u00abverte\u00bb<\/em> peut \u00eatre convertie en ammoniac, une mati\u00e8re premi\u00e8re essentielle pour les engrais, avec d\u2019autres utilisations dans le transport de carburant, la production d\u2019\u00e9lectricit\u00e9 et la fabrication de l\u2019acier.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-wp-embed is-provider-kapitalis wp-block-embed-kapitalis\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"wp-embedded-content\" data-secret=\"Otztjs26dl\"><a href=\"https:\/\/kapitalis.com\/tunisie\/2023\/05\/25\/lhydrogene-vert-est-il-la-bonne-reponse-aux-besoins-energetiques-de-la-tunisie\/\">L\u2019hydrog\u00e8ne vert est-il la bonne r\u00e9ponse aux besoins \u00e9nerg\u00e9tiques de la Tunisie\u00a0?<\/a><\/blockquote><iframe loading=\"lazy\" class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"\u00ab\u00a0L\u2019hydrog\u00e8ne vert est-il la bonne r\u00e9ponse aux besoins \u00e9nerg\u00e9tiques de la Tunisie\u00a0?\u00a0\u00bb &#8212; Kapitalis\" src=\"https:\/\/kapitalis.com\/tunisie\/2023\/05\/25\/lhydrogene-vert-est-il-la-bonne-reponse-aux-besoins-energetiques-de-la-tunisie\/embed\/#?secret=MIEj86g1NE#?secret=Otztjs26dl\" data-secret=\"Otztjs26dl\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe>\n<\/div><\/figure>\n\n\n\n<p>Il faut \u00e9galement tenir compte des pertes d\u2019\u00e9nergie importantes : environ un tiers de l\u2019\u00e9nergie utilis\u00e9e pour produire le gaz par \u00e9lectrolyse est perdu. Le transport de l\u2019hydrog\u00e8ne n\u00e9cessite une \u00e9nergie suppl\u00e9mentaire, \u00e9quivalente \u00e0 10% de l\u2019\u00e9nergie du carburant lui-m\u00eame.<\/p>\n\n\n\n<p>Du point de vue des pays africains, comme le souligne le r\u00e9cent rapport sur une transition juste, l\u2019\u00e9nergie pourrait \u00eatre utilis\u00e9e localement pour r\u00e9pondre aux besoins imm\u00e9diats plut\u00f4t que d\u2019\u00eatre utilis\u00e9e pour produire de l\u2019hydrog\u00e8ne destin\u00e9 \u00e0 \u00eatre utilis\u00e9 en Europe.<\/p>\n\n\n\n<p><em>\u00abMoins de 0,04% de la production totale d\u2019hydrog\u00e8ne est \u2018\u2018verte\u2019\u2019. Cette proportion est vou\u00e9e \u00e0 augmenter \u00e0 mesure que les gouvernements du monde entier parient qu\u2019elle jouera un r\u00f4le cl\u00e9 dans la r\u00e9duction des \u00e9missions lourdes de carbone dans des industries telles que la fabrication du ciment. Avec une quantit\u00e9 de dioxyde de carbone dans l\u2019atmosph\u00e8re d\u00e9j\u00e0 de 422 parties par million (ppm) \u2013 bien plus \u00e9lev\u00e9e que les 350 ppm g\u00e9n\u00e9ralement consid\u00e9r\u00e9s comme un niveau relativement s\u00fbr \u2013 il n\u2019y a aucune possibilit\u00e9 d\u2019aggraver le probl\u00e8me\u00bb<\/em>, \u00e9crit<a href=\"https:\/\/www.theguardian.com\/commentisfree\/2023\/aug\/27\/the-guardian-view-on-hydrogen-hype-its-perhaps-not-as-green-as-you-think\" target=\"_blank\" rel=\"noreferrer noopener\"> <em>The Guardian<\/em><\/a> dans un r\u00e9cent \u00e9ditorial, Mais le journal s\u2019empresse de pr\u00e9venir: <em>\u00abLa transition vers z\u00e9ro \u00e9mission nette \u00e0 l\u2019\u00e9chelle mondiale ne devrait pas permettre aux riches de gagner au d\u00e9triment des pauvres.\u00bb<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>La production de l&rsquo;\u00e9lectricit\u00e9 \u00e0 partir de l&rsquo;hydrog\u00e8ne vert est-elle une bonne id\u00e9e en Tunisie ?   <\/p>\n","protected":false},"author":8,"featured_media":6635576,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[992,995,2433],"tags":[107056,81951,5640,86035,91928,22735,62643,107607],"class_list":["post-9741617","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-a-la-une","category-economie","category-tunisie","tag-decarbonation","tag-emissions-de-carbone","tag-energies-renouvelables","tag-fondation-heinrich-boll-2","tag-hydrogene-vert","tag-raoudha-gafrej","tag-tunisie","tag-union-europeeene"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - 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