摘要:
L'invention se rapporte à un procédé et à un catalyseur contenant du nickel permettant de préparer du gaz synthétique en procédant au reformage d'un composé d'hydrocarbyle à l'aide d'un composé contenant de l'oxygène.
摘要:
The present invention relates to composite materials for membrane reactors which include a gas-tight ceramic (28), a porous support (15, 16), and an interfacial zone therebetween. More particularly, this invention relates to composite materials using oxygen ion-conducting dense ceramic membranes (28) formed on a porous support (15, 16) comprising a metallic alloy to provide an interfacial zone identifiable by a gradient of composition in at least one metallic element across the interfacial zone between the dense ceramic membrane and the porous support. Processes using composite materials in accordance with the invention are, for example, used for production of synthesis gas comprising carbon monoxide and molecular hydrogen which synthesis gas is, advantageously, free of deleterious and/or inert gaseous diluents such as nitrogen.
摘要:
Composite materials of the invention, which include a gas-tight ceramic, a porous metallic support, and an interfacial zone therebetween eliminate the need for mechanical seals between two such dissimilar materials. Oxygen ion-conducting dense ceramic membranes are formed on a porous metallic alloy to provide an interfacial zone identifiable by a gradient of composition in at least one metallic element across the interfacial zone between the dense ceramic membrane and the porous support. Processes using composite materials in accordance with the invention are, for example, used for production of synthesis gas comprising carbon monoxide and molecular hydrogen, whereby the synthesis gas is, advantageously, free of deleterious and/or inert gaseous diluents such as nitrogen.
摘要:
The present invention relates to devices (11) for simultaneously conducting exothermic (31) and endothermic (41) chemical conversions with transfer of heat therebetween. More particularly, this invention relates to autothermic modules (11) using oxygen ion-conducting dense ceramic membranes (35) to selectively separate oxygen from an oxygen-containing gas and supply is directly to partial combustion (31) of gaseous organic compounds. Processes using autothermic modules in accordance with this invention are advantageously used for production of synthesis gas comprising carbon monoxide and molecular hydrogen which synthesis gas is substantially free of deleterious and/or inert gaseous diluents such as nitrogen. In particular, they are used for conversions, within the integral autothermic module, of natural gas or other forms of gaseous lower alkanes to synthesis gas by means of partial combustion followed by steam and/or carbon dioxide reforming.
摘要:
A direct, simplified and relatively salt-free process is described for making anionic, hydrotalcite-type pillared clay compositions which contain nickel, and their heat-treated derivatives. Compositions of the invention are manufactured from reactants which contain a relatively minor amount of metal salts or, preferably, contain essentially no metal salts. Preferred compositions made by the process form a number of new nickel-containing catalytic materials which are unusually resistant to deactivation, for example resistant to coke formation when used to catalyze chemical conversions of a hydrocarbyl compound with an oxygen-containing gas at elevated temperatures to form synthesis gas.
摘要:
On décrit une composition de matériaux de contact contenant un oxyde mixte, intimement mélangé, d'au moins une espèce cationique d'un élément du Groupe IIIB qui se trouve à l'état naturel, d'au moins une espèce cationique d'un métal du groupe IIA de magnésium, calcium, strontium et baryum et d'au moins une espèce cationique métallique additionnelle de zirconium, hafnium, germanium, gallium ou aluminium, ainsi que des procédés de conversion d'hydrocarbures à l'aide de ces compositions de matériaux de contact.