{"id":3625,"date":"2007-10-27T07:34:00","date_gmt":"2007-10-27T07:34:00","guid":{"rendered":"http:\/\/blogs.thesocialmedia.com\/leblogenergie\/2007\/10\/27\/le-dme-un-vecte\/"},"modified":"2012-07-12T10:06:43","modified_gmt":"2012-07-12T10:06:43","slug":"le-dme-un-vecte","status":"publish","type":"post","link":"https:\/\/blogs.thesocialmedia.com\/leblogenergie\/2007\/10\/27\/le-dme-un-vecte\/","title":{"rendered":"Le DME, un vecteur d’\u00e9nergie int\u00e9ressant"},"content":{"rendered":"

      \"Buses\"<\/a>               <\/p>\n

           L<\/span>e DME ou  dimethyl \u00e9ther est le plus simple des \u00e9thers de formule CH3-O-CH3. Il est connu, surtout au Japon et en Chine, comme un possible carburant obtenu par synth\u00e8se, \u00e0 partir de gaz ou de charbon. De plus, il serait possible que sa synth\u00e8se \u00e0 partir de cellulose, soit un jour rendue possible. C’est un futur candidat au remplacement du gasoil dans les v\u00e9hicules diesel.<\/p>\n

                C’est un gaz, liquide \u00e0 -26\u00b0C, aux propri\u00e9t\u00e9s voisines de celles du Propane. Son \u00e9nergie massique est plus faible que celle du Propane, mais comme il est plus dense \u00e0 l’\u00e9tat liquide que ce dernier, son \u00e9nergie volumique est tr\u00e8s voisine de celle du Propane. C’est donc un gaz ais\u00e9ment liqu\u00e9fiable qui peut \u00eatre conditionn\u00e9 en bouteilles ou en cuves comme le Butane ou le Propane. <\/p>\n

               Il pr\u00e9sente aussi une caract\u00e9ristique physique tr\u00e8s int\u00e9ressante: il poss\u00e8de un indice d’octane \u00e9lev\u00e9 ce qui permet de l’utiliser dans un moteur diesel en substitution du gasoil. Il n’est pas corrosif, il n’est pas agressif vis \u00e0 vis de la couche d’ozone.<\/p>\n

                Sa synth\u00e8se traditionnelle est r\u00e9alis\u00e9e \u00e0 partir du m\u00e9thanol. Mais les proc\u00e9d\u00e9s les plus modernes, largement \u00e9tudi\u00e9s par les Japonais, utilisent le gaz naturel et obtiennent le DME en une seule \u00e9tape, sans passer par le M\u00e9thanol.<\/p>\n

                Le diagrame sch\u00e9matique des flux du proc\u00e9d\u00e9 de synth\u00e8se du DME, d\u00e9velopp\u00e9 par la soci\u00e9t\u00e9  Japonaise JFE est le suivant :\"Image001\"<\/a>  <\/p>\n

                  Son utilisation comme carburant gazeux liqu\u00e9fi\u00e9 de v\u00e9hicules \u00e0 moteurs diesel est en cours d’\u00e9valuation en Chine et au Japon.<\/p>\n

                    Au Japon, neuf Soci\u00e9t\u00e9s ont cr\u00e9\u00e9 un "joint venture" pour construire une unit\u00e9 pilote de production de 80000 tonnes de DME par an, dans une usine de Mitsubishi Gas Chemical \u00e0 Niigata. Le Groupe Total<\/a> est associ\u00e9 \u00e0 ce projet. En Chine, une unit\u00e9 pilote de production \u00e0 partir de charbon est implant\u00e9e \u00e0 Shangai. Un projet industriel, de 210000 tonnes par an, aurait \u00e9t\u00e9 lanc\u00e9 avec le japonais Toyo Engineering dans le Ningxia.<\/p>\n

                   D’apr\u00e8s Total, ce produit pourrait \u00eatre int\u00e9ressant lors de l’exploitation de gisements gazeux de faibles tailles qui ne permettent pas de financer un gazoduc ou une unit\u00e9 de liqu\u00e9faction de type GNL. Une unit\u00e9 de synth\u00e8se et de conditionnement de DME au voisinage du gisement, serait une alternative beaucoup moins on\u00e9reuse. <\/p>\n","protected":false},"excerpt":{"rendered":"

                                 Le DME ou  dimethyl \u00e9ther est le plus simple des \u00e9thers de formule CH3-O-CH3. Il est connu, surtout au Japon et en Chine, comme un possible carburant obtenu par synth\u00e8se, \u00e0 partir de gaz ou de charbon. De plus, il serait possible que […]<\/p>\n","protected":false},"author":341,"featured_media":6535,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-3625","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-energie-fossile"],"yoast_head":"\nLe DME, un vecteur d'\u00e9nergie int\u00e9ressant - 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\/2007\/10\/27\/le-dme-un-vecte\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"Le DME, un vecteur d'\u00e9nergie int\u00e9ressant - leblogenergie.com\" \/>\n<meta name=\"twitter:description\" content=\"                                 Le DME ou  dimethyl \u00e9ther est le plus simple des \u00e9thers de formule CH3-O-CH3. 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