{"id":975,"date":"2009-04-02T13:57:36","date_gmt":"2009-04-02T13:57:36","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2009\/04\/02\/un-rapport-confirme-les-progres-energetiques-accomplis-et-attendus-dans-la-production-dethanol-de-ma\/"},"modified":"2012-07-12T11:30:18","modified_gmt":"2012-07-12T11:30:18","slug":"un-rapport-confirme-les-progres-energetiques-accomplis-et-attendus-dans-la-production-dethanol-de-ma","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2009\/04\/02\/un-rapport-confirme-les-progres-energetiques-accomplis-et-attendus-dans-la-production-dethanol-de-ma\/","title":{"rendered":"Un rapport confirme les progr\u00e8s \u00e9nerg\u00e9tiques accomplis et attendus dans la production d’\u00e9thanol de ma\u00efs en Am\u00e9rique du nord"},"content":{"rendered":"

                            I<\/strong>l avait \u00e9t\u00e9 rapport\u00e9 ici, en d\u00e9but d'ann\u00e9e, une tr\u00e8s importante \u00e9tude de terrain dirig\u00e9e par Kennett Cassman, partant de donn\u00e9es op\u00e9rationnelles, qui d\u00e9montrait que la production et la distribution d'\u00e9thanol "du champ \u00e0 la roue" avait fait de tr\u00e8s bons progr\u00e8s et disposait d'un champ d'am\u00e9lioration encore important (LIRE<\/a> cette importante \u00e9tude). Un papier de l'IEA Bioenergy vient confirmer les conclusions de cette \u00e9tude. Elle affirme que le bilan \u00e9nerg\u00e9tique des productions d'\u00e9thanol s'est nettement am\u00e9lior\u00e9 entre 2005 et 1995 avec un rendement \u00e9nerg\u00e9tique net de 1,4 et qu'il devrait atteindre pr\u00e8s de deux en 2015 (FIG.). Cette nette am\u00e9lioration du bilan \u00e9nerg\u00e9tique net de la production d'\u00e9thanol s'accompagne d'une baisse du rendement \u00e9nerg\u00e9tique de la production d'essence li\u00e9e \u00e0 la complexit\u00e9 grandissante des conditions d'extraction du p\u00e9trole.<\/p>\n

\"IEA-Bioenergy-\u00e9nergie-EtOH\"<\/a>  <\/span><\/span><\/p>\n

En relation avec ces \u00e9volutions, les \u00e9missions de CO2 par unit\u00e9 d'\u00e9nergie utilis\u00e9e deviennent franchement favorables \u00e0 l'\u00e9thanol (FIG.II).<\/p>\n

\"IEA-Bioenergy-CO2-EtOH\"<\/a>  <\/p>\n

                  Cette publication ne fait que confirmer l'\u00e9tude de Cassman. Les progr\u00e8s attendus dans la s\u00e9lection des semences de ma\u00efs g\u00e9n\u00e9tiquement modifi\u00e9es, dans la gestion de l'\u00e9nergie des proc\u00e9d\u00e9s dans les usines, dans l'introduction d'une boucle de deuxi\u00e8me g\u00e9n\u00e9ration utilisant les rafles de ma\u00efs, dans l'acheminement par pipe-line du fuel \u00e9thanol vont permettre d'am\u00e9liorer encore les rendements \u00e9nerg\u00e9tiques nets de ces productions. L'arriv\u00e9e d'industriels confirm\u00e9s comme le raffineur Valero dans le business devrait acc\u00e9l\u00e9rer les perfectionnements et les am\u00e9liorations portant sur bilan \u00e9nerg\u00e9tique et \u00e9cologique de ces proc\u00e9d\u00e9s agricoles.<\/p>\n

               Ces progr\u00e8s dans l'alcool de ma\u00efs d\u00e9notent par rapport au quasi immobilisme des projets de synth\u00e8se d'\u00e9thanol \u00e0 partir de compos\u00e9s ligno-cellulosiques qui devaient faire fureur. Il semblerait que la mise au point industrielle des multiples variantes soit plus ardue que pr\u00e9vu.<\/p>\n

LIRE<\/a> le rapport de l'IEA Bioenergy.<\/p>\n

Le 2 Avril 2009.<\/p>\n

–<\/p>\n","protected":false},"excerpt":{"rendered":"

                            Il avait \u00e9t\u00e9 rapport\u00e9 ici, en d\u00e9but d'ann\u00e9e, une tr\u00e8s importante \u00e9tude de terrain dirig\u00e9e par Kennett Cassman, partant de donn\u00e9es op\u00e9rationnelles, qui d\u00e9montrait que la production et la distribution d'\u00e9thanol "du champ \u00e0 la roue" avait fait de tr\u00e8s bons progr\u00e8s et disposait d'un champ d'am\u00e9lioration encore important (LIRE cette importante \u00e9tude). Un papier […]<\/p>\n","protected":false},"author":341,"featured_media":19942,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-975","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bio-carburants"],"yoast_head":"\nUn rapport confirme les progr\u00e8s \u00e9nerg\u00e9tiques accomplis et attendus dans la production d'\u00e9thanol de ma\u00efs en Am\u00e9rique du nord - leblogenergie.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2009\/04\/02\/un-rapport-confirme-les-progres-energetiques-accomplis-et-attendus-dans-la-production-dethanol-de-ma\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Un rapport confirme les progr\u00e8s \u00e9nerg\u00e9tiques accomplis et attendus dans la production d'\u00e9thanol de ma\u00efs en Am\u00e9rique du nord - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"                            Il avait \u00e9t\u00e9 rapport\u00e9 ici, en d\u00e9but d'ann\u00e9e, une tr\u00e8s importante \u00e9tude de terrain dirig\u00e9e par Kennett Cassman, partant de donn\u00e9es op\u00e9rationnelles, qui d\u00e9montrait que la production et la distribution d'\u00e9thanol "du champ \u00e0 la roue" avait fait de tr\u00e8s bons progr\u00e8s et disposait d'un champ d'am\u00e9lioration encore important (LIRE cette importante \u00e9tude). 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