Conversion of methane and carbon dioxide using catalytic membranes - new effective method for syngas

• Date de parution : 10/05/2011
• Editeur : Editions Universitaires Europeennes
• EAN : 9786131574863
• Série : (-)
• Support : Poche

• Nombre de pages : (-)
• Collection : (-)
• Genre : Lettres et linguistique
• Thème : Lettres et linguistique Poche
• Prix littéraire(s) : (-)

This study reports the development of a new process to convert methane and carbon dioxide into syngas from non-oil resources. The process uses membrane catalytic systems (MCS) that support heterogeneous catalytic reactions in gaseous phase in membrane channels. An active surface of the catalysts... Voir plus

This study reports the development of a new process to convert methane and carbon dioxide into syngas from non-oil resources. The process uses membrane catalytic systems (MCS) that support heterogeneous catalytic reactions in gaseous phase in membrane channels. An active surface of the catalysts formed inside the micro- channels is low in term of area, but it is characterized by a high value of the catalyst surface/volume ratio, which induces a high efficiency of heterogeneous catalysis. Such MCS, having 10 8 pores per cm2 of surface, can be considered as a set of nano reactors. MCS are formed from alkoxy derivatives and precursor metal complex containing between 0.008 and 0.055% by weight of nano- components mono-and bimetallic active distributed evenly in the channels. For systems La-Ce/Ni-Al and Pd-Mn/Ni-Al, productivities of 10500 and 7500 l/h dm3 were respectively obtained at 650ºC with a composition of syngas H2/ ranging from 0.63 to 1.25 and a conversion rate of 50% with a CH4/ 2 (1/1) feed. Thus MCS is an order of magnitude more efficient than a fixed bed reactor of the same catalyst. A catalytic synergy has been demonstrated for the system Pd-Mn.