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{"id":1051,"date":"2010-01-08T06:41:11","date_gmt":"2010-01-08T04:41:11","guid":{"rendered":"https:\/\/energethique.be\/?p=1051"},"modified":"2010-01-07T18:54:08","modified_gmt":"2010-01-07T16:54:08","slug":"piegons-le-co2","status":"publish","type":"post","link":"https:\/\/energethique.be\/2010\/piegons-le-co2\/","title":{"rendered":"Pi\u00e9gons le CO2"},"content":{"rendered":"<p>Une des id\u00e9es retenues pour r\u00e9duire la concentration en CO2 dans l&rsquo;atmosph\u00e8re est le pi\u00e9geage artificiel.<\/p>\n<p>Mais qu&rsquo;est ce que le pi\u00e9geage artificiel ?<\/p>\n<p>Pour y voir plus clair reprenons un peu depuis le d\u00e9but &#8230;<\/p>\n<p>Le CO2 est un des gaz \u00e0 effet de serre, comme le sont la vapeur d&rsquo;eau (H2O), le m\u00e9thane (CH4), le protoxyde d&rsquo;azote (NO2) et l&rsquo;ozone (O3) pour les principaux, contribuant \u00e0 l&rsquo;augmentation de l&rsquo;effet de serre sans lequel la vie sur terre serait impossible.<\/p>\n<p>Rappelons que la vapeur d&rsquo;eau est \u00e0 l&rsquo;origine de pr\u00e8s de 75% de l&rsquo;effet de serre (<a href=\"http:\/\/www.manicore.com\/documentation\/serre\/gaz.html\" target=\"_blank\">source<\/a>).<\/p>\n<p>Le probl\u00e8me r\u00e9side dans le fait que la combustion des \u00e9nergies fossiles, qui n&rsquo;est rien d&rsquo;autre qu&rsquo;une lib\u00e9ration d&rsquo;un pi\u00e9geage ancestral, lib\u00e8re de trop grande quantit\u00e9 de CO2 (entre autre) qui accentue cet effet de serre.<\/p>\n<p>Notez en passant que l&rsquo;effet de serre \u00abs&rsquo;autoalimente\u00bb, en effet plus la temp\u00e9rature augmente plus vous avez de la vapeur d&rsquo;eau dans l&rsquo;air, plus vous offrez la possibilit\u00e9 \u00e0 des puits de m\u00e9thane de lib\u00e9rer le m\u00e9thane (dans le permafrost sib\u00e9rien), plus vous r\u00e9duisez la banquise r\u00e9flecteur solaire naturel, &#8230; bref  la cata!<\/p>\n<p>Les possibilit\u00e9s offertes de r\u00e9duction des concentrations de gaz carbonique dans l&rsquo;atmosph\u00e8re ne sont malheureusement pas nombreuses.<\/p>\n<p>On note ainsi que l&rsquo;on peut agir sur :<\/p>\n<p>\u00b0 la r\u00e9duction des \u00e9missions par la r\u00e9duction de la consommation d&rsquo;\u00e9nergie fossile combin\u00e9e \u00e0 une diminution de la consommation li\u00e9e \u00e0 l&rsquo;optimisation des performances de combustion<\/p>\n<p>\u00b0 utilisation de nouveau combustible fossile moins \u00e9metteur (remplacer le charbon par le  gaz)<\/p>\n<p>\u00b0 encourager les \u00e9nergies vertes et  renouvelables<\/p>\n<p>\u00b0 augmentation de l&rsquo;efficacit\u00e9 des puits naturels (oc\u00e9an, for\u00eat, &#8230;)<\/p>\n<ul><\/ul>\n<p>Malheureusement ces solutions ne sont que partielles et il faudra d\u00e9velopper d&rsquo;autres m\u00e9thodes pour enrayer l&rsquo;expansion croissante des concentrations en gaz \u00e0 effet de serre dans l&rsquo;atmosph\u00e8re.<\/p>\n<p>La question est pos\u00e9e et donc que faire ?<\/p>\n<p>Et bien pi\u00e9geons ce qui peut l&rsquo;\u00eatre &#8230; facile \u00e0 dire, plus difficile \u00e0 r\u00e9aliser !<\/p>\n<p>Si vous me permettez une image l&rsquo;id\u00e9e retenue est de balayer les poussi\u00e8res et de les glisser sous le tapis mais il est imp\u00e9ratif que ce type pi\u00e9geage se fasse \u00ab\u00e0 la pampers\u00bb c&rsquo;est \u00e0 dire sans fuite !<\/p>\n<p>La solution retenue dans ce cas pr\u00e9cis serait l&rsquo;injection de CO2 liqu\u00e9fi\u00e9 dans des roches basaltiques qui se transformera ainsi en solide ayant l&rsquo;aspect du carbonate de calcium (calcaire &#8211; craie) ce qui emp\u00eacherait un relargage accidentel.<\/p>\n<p>D&rsquo;apr\u00e8s les chercheurs l&rsquo;un de ces pi\u00e8ges basaltiques les plus grands, situ\u00e9 aux USA, permettrait ainsi de pi\u00e9ger l&rsquo;\u00e9quivalent de 1 milliard de tonne de CO2 soit la production de quatre centrales \u00e0 charbon d\u2019un gigawatt pendant 40 ans.<\/p>\n<p>D&rsquo;apr\u00e8s <a href=\"http:\/\/www.futura-sciences.com\/fr\/environnement\/\" target=\"_blank\">Futura-Sciences<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Une des id\u00e9es retenues pour r\u00e9duire la concentration en CO2 dans l&rsquo;atmosph\u00e8re est le pi\u00e9geage artificiel.<\/p>\n<p>Mais qu&rsquo;est ce que le pi\u00e9geage artificiel ?<\/p>\n<p>Pour y voir plus clair reprenons un peu depuis le d\u00e9but &#8230;<\/p>\n<p>Le CO2 est un des gaz \u00e0 effet de serre, comme le sont la vapeur d&rsquo;eau (H2O), le m\u00e9thane (CH4), le protoxyde d&rsquo;azote (NO2) et l&rsquo;ozone (O3) pour les principaux, contribuant \u00e0 l&rsquo;augmentation de l&rsquo;effet de serre sans lequel la vie sur terre serait impossible.<\/p>\n<p>Rappelons que la [&#8230;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[1],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/pBGwz-gX","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/1051"}],"collection":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/comments?post=1051"}],"version-history":[{"count":0,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/posts\/1051\/revisions"}],"wp:attachment":[{"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/media?parent=1051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/categories?post=1051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/energethique.be\/wp-json\/wp\/v2\/tags?post=1051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}