{"id":5087,"date":"2009-01-09T11:15:41","date_gmt":"2009-01-09T09:15:41","guid":{"rendered":"http:\/\/staging.sillon38.com\/2009\/01\/09\/agrocarburant-lhuile-de-bois-ou-de-paille-a-letude\/"},"modified":"2009-01-09T11:15:41","modified_gmt":"2009-01-09T09:15:41","slug":"agrocarburant-lhuile-de-bois-ou-de-paille-a-letude","status":"publish","type":"post","link":"https:\/\/www.sillon38.com\/blog\/2009\/01\/09\/agrocarburant-lhuile-de-bois-ou-de-paille-a-letude\/","title":{"rendered":"Agrocarburant: l\u2019huile de bois ou de paille \u00e0 l\u2019\u00e9tude"},"content":{"rendered":"<p><span class=\"titreintpress2\"><\/span><strong>Le Cirad h\u00e9berge le premier pilote op\u00e9rationnel en France de pr\u00e9conditionnement de la biomasse par pyrolyse flash. L\u2019huile extraite servira de base \u00e0 des agrocarburants de seconde g\u00e9n\u00e9ration. Les r\u00e9sultats des tests pr\u00e9cisent \u00e9galement les sp\u00e9cifications attendues d\u2019une huile de pyrolyse pour des applications \u00e0 grande \u00e9chelle.<\/strong><br \/>\nUne installation pilote qui permet de transformer du bois ou de la paille en une huile de densit\u00e9 \u00e9nerg\u00e9tique dix fois plus importante que le mat\u00e9riau brut de d\u00e9part : c\u2019est ce dont le Cirad dispose aujourd\u2019hui dans le cadre du projet Pr\u00e9cond, une \u00e9tude sur le pr\u00e9conditionnement de la biomasse men\u00e9e en partenariat et qui s\u2019ach\u00e8vera dans les mois \u00e0 venir. Cette installation permet d\u2019obtenir plusieurs litres d\u2019huile par jour destin\u00e9s \u00e0 la synth\u00e8se d\u2019agrocarburants de seconde g\u00e9n\u00e9ration.<\/p>\n<blockquote><p>La biomasse lignocellulosique \u2013 bois et r\u00e9sidus agricoles comme la paille, la bagasse, la balle de riz, etc. \u2013 constitue une ressource \u00e9nerg\u00e9tique prometteuse pour l\u2019avenir. Sa valorisation \u00e9nerg\u00e9tique pr\u00e9sente en effet un bilan carbone bien meilleur que les voies de biocarburants de premi\u00e8re g\u00e9n\u00e9ration.<\/p><\/blockquote>\n<p>N\u00e9anmoins, la viabilit\u00e9 de cette voie n\u2019est possible que si de tr\u00e8s grandes quantit\u00e9s de ressources ligneuses sont mobilisables. Du fait de la dispersion g\u00e9ographique de ces ressources et pour limiter l\u2019impact \u00e9conomique et environnemental du transport, les chercheurs d\u00e9veloppent des techniques de pr\u00e9conditionnement de la biomasse sur sites d\u00e9centralis\u00e9s, \u00e0 proximit\u00e9 de la r\u00e9colte.<\/p>\n<p>La pyrolyse flash est une de ces techniques. Elle permet de transformer la biomasse en une huile interm\u00e9diaire. Celle-ci peut ensuite \u00eatre amen\u00e9e vers une installation centralis\u00e9e pour la production de gaz et la synth\u00e8se de carburants. Avant d\u2019en arriver l\u00e0, les huiles obtenues doivent rev\u00eatir certaines caract\u00e9ristiques, notamment en termes de viscosit\u00e9, de stabilit\u00e9, de teneur en eau mais aussi en particules solides et en cendres. L\u2019installation pilote dont dispose aujourd\u2019hui le Cirad a \u00e9t\u00e9 s\u00e9lectionn\u00e9e et am\u00e9lior\u00e9e de fa\u00e7on \u00e0 r\u00e9pondre au mieux \u00e0 ces sp\u00e9cifications. Elle sert de point d\u2019entr\u00e9e \u00e0 un travail de mod\u00e9lisation et d\u2019extrapolation vers l\u2019\u00e9chelle industrielle.<\/p>\n<p>Les chercheurs obtiennent ainsi \u00e0 partir du bois \u2013 d\u2019abord du h\u00eatre puis des r\u00e9sineux \u2013 des huiles aux caract\u00e9ristiques proches de l\u2019id\u00e9al. La paille, au rendement \u00e9nerg\u00e9tique moins \u00e9lev\u00e9 \u2013 50 % au lieu de 70 % pour le bois \u2013, passera \u00e9galement au crible de l\u2019analyse dans un proche avenir. Les chercheurs testeront pour finir des biomasses tropicales. Cette voie n\u2019a, en effet, \u00e9t\u00e9 \u00e9tudi\u00e9e principalement que dans les pays du Nord o\u00f9 existent des installations \u00e0 l\u2019\u00e9chelle de d\u00e9monstration. Elle int\u00e9resse toutefois, de plus en plus, des pays \u00e9mergents comme le Br\u00e9sil.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le Cirad h\u00e9berge le premier pilote op\u00e9rationnel en France de pr\u00e9conditionnement de la biomasse par pyrolyse flash. L\u2019huile extraite servira de base \u00e0 des agrocarburants de seconde g\u00e9n\u00e9ration. Les r\u00e9sultats des tests pr\u00e9cisent \u00e9galement les sp\u00e9cifications attendues d\u2019une huile de&#8230;<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[64],"tags":[],"class_list":["post-5087","post","type-post","status-publish","format-standard","hentry","category-recherche-scientifique"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Agrocarburant: l\u2019huile de bois ou de paille \u00e0 l\u2019\u00e9tude -<\/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:\/\/www.sillon38.com\/blog\/2009\/01\/09\/agrocarburant-lhuile-de-bois-ou-de-paille-a-letude\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Agrocarburant: l\u2019huile de bois ou de paille \u00e0 l\u2019\u00e9tude -\" \/>\n<meta property=\"og:description\" content=\"Le Cirad h\u00e9berge le premier pilote op\u00e9rationnel en France de pr\u00e9conditionnement de la biomasse par pyrolyse flash. 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