{"id":2919,"date":"2008-03-09T11:11:50","date_gmt":"2008-03-09T11:11:50","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/03\/09\/synthse-catalyt\/"},"modified":"2012-07-12T10:29:02","modified_gmt":"2012-07-12T10:29:02","slug":"synthse-catalyt","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2008\/03\/09\/synthse-catalyt\/","title":{"rendered":"Synth\u00e8se catalytique du biodiesel en process continu"},"content":{"rendered":"

\"Mcgyan1\"<\/a>                            La r\u00e9action classique de transest\u00e9rification des huiles ou des graisses en bio carburants par r\u00e9action d’un alcool dans un milieu fortement alcalin pr\u00e9sente bien des inconv\u00e9nients: c’est une r\u00e9action en lot, qui dure plusieurs heures et qui \u00e9met des effluents (eau, K2SO4 issu de la neutralisation de la potasse) et un sous-produit le glycerol dont les d\u00e9bouchers ne sont pas assur\u00e9s. Ce genre de proc\u00e9d\u00e9 est acceptable pour des productions artisanales, mais il trouve ses limites pour de larges projets industriels. Ces raisons ont incit\u00e9 des laboratoires \u00e0 travailler sur des r\u00e9actions catalytiques en continu qui s’affranchiraient de ces contraintes. C’est le cas du Professeur Arlin Gyberg<\/strong><\/span><\/u>, du Coll\u00e8ge d’Augsburg dans le Minnesota, qui a imagin\u00e9 et \u00e9tudi\u00e9 un tel proc\u00e9d\u00e9.<\/p>\n

                                   \"Biodiesel1_2\"<\/a>                               <\/a>Dans un r\u00e9acteur rempli de sph\u00e8res d’oxydes catalytiques port\u00e9 \u00e0 350\u00b0C on injecte simultan\u00e9ment 60% de m\u00e9thanol et 40% d’huile, le temps de r\u00e9action est d’environ une minute<\/u> et l’on obtient \u00e0 la sortie du r\u00e9acteur du m\u00e9thanol et le biodiesel qui ne sont pas miscibles. Apr\u00e8s s\u00e9paration le m\u00e9thanol est r\u00e9inject\u00e9 en t\u00eate de r\u00e9acteur. <\/p>\n

                            Ce type de proc\u00e9d\u00e9 qui pourrait accepter divers types d’huiles ou de suifs (tallow en anglais) doit maintenant passer en phase pr\u00e9-industrielle pour \u00eatre qualifi\u00e9. Bien s\u00fbr, \u00e0 la mode am\u00e9ricaine, un essai de coin de paillasse est pr\u00e9sent\u00e9 comme un proc\u00e9d\u00e9 \u00e0 vendre cl\u00e9 en mains. Mais nul doute que les inventeurs trouveront les financements pour aller plus loin.<\/p>\n

                            Pour en savoir plus<\/a>.(en anglais)<\/p>\n","protected":false},"excerpt":{"rendered":"

                           La r\u00e9action classique de transest\u00e9rification des huiles ou des graisses en bio carburants par r\u00e9action d’un alcool dans un milieu fortement alcalin pr\u00e9sente bien des inconv\u00e9nients: c’est une r\u00e9action en lot, qui dure plusieurs heures et qui \u00e9met des effluents (eau, K2SO4 issu de la neutralisation […]<\/p>\n","protected":false},"author":341,"featured_media":8093,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"class_list":["post-2919","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bio-carburants"],"yoast_head":"\nSynth\u00e8se catalytique du biodiesel en process continu - 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\/2008\/03\/09\/synthse-catalyt\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Synth\u00e8se catalytique du biodiesel en process continu - 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