摘要:
The present invention relates to a process for the conversion of oxygenates to olefins comprising (i) providing a gas stream comprising one or more oxygenates; and (ii) contacting the gas stream with a catalyst; wherein the catalyst comprises a zeolitic material having an MFI, MEL, and/or MWW-type framework structure comprising YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element, said zeolitic material being obtainable and/or obtained according to a method comprising (1) preparing a mixture comprising one or more sources for YO2, one or more sources for X2O3, and one or more solvents; and (2) crystallizing the mixture obtained in step (1) to obtain a zeolitic material having an MFI, MEL and/or MWW-type framework structure; wherein the mixture crystallized in step (2) contains 3 wt.-% or less of the one or more elements M based on 100 wt.-% of YO2, wherein M stands for sodium.
摘要:
Die Erfindung betrifft einen mit katalytisch wirksamen Partikeln (3) belegten Katalysatorträger (1), ein Verfahren zu dessen Herstellung sowie ein Verfahren zur Katalyse unter Nutzung von Plasmonenresonanz. Die Plasmonenresonanz wird durch Licht (5) einer Anregungswellenlänge angeregt, das auf die Partikel (3) gestrahlt ist. Ein erfindungsgemäßer Katalysatorträger (1) ist ein mit katalytisch wirksamen Partikeln (3) belegter Katalysatorträger (1), wobei das Material und die Form der Partikel (3) dazu geeignet ist, bei Einwirkung von Licht (5) einer bestimmten Anregungswellenlänge und Intensität auf der Oberfläche der Partikel (3) Plasmonenresonanz und hohe Feldüberhöhungen hervorzurufen, dadurch gekennzeichnet, dass der Katalysatorträger (1) aus einem Trägermaterial besteht, das für die Anregungswellenlänge transparent ist und durch das Trägermaterial eine Porosität bereitgestellt ist und die Porosität offenporig ist, wobei freie Oberflächen der Poren (2) mindestens bereichsweise mit Partikeln (3) belegt sind.
摘要:
Disclosed are a semiconductor photocatalyst for the photocatalytic reforming of biomass derivatives for hydrogen generation, and preparation and use thereof. The semiconductor photocatalyst has the atomic composition ratio of M-N-Ax; wherein M-N are IIB group elements to VIA group elements, or IIIA group elements to VA group elements, A being one element or more than two elements selected from the group consisting of cobalt, nickel, iron, copper, chromium, palladium, platinum, ruthenium, rhodium, iridium and silver; and 0.02% ‰¤ x ‰¤ 1.0%. The method of in-situ preparation of the highly effective semiconductor photocatalyst and catalytically reforming biomass derivatives for hydrogen generation by driving photoreaction with visible light via quantum dots is simple, fast, highly effective, inexpensive and practical. The in situ reaction can occur in sunlight without the need of harsh conditions such as calcination.
摘要:
A method and apparatus for producing core-shell type metal nanoparticles which are excellent in productivity are provided, in particular, the present invention provides a method of production of core-shell type metal nanoparticles including (a) a step of introducing a solution of a salt of a first metal to a first flow path of a flow type reaction apparatus and applying plasma to the solution of the salt of the first metal in the first flow path to obtain a solution which contains metal nanoparticles of the first metal and (b) a step of introducing a solution of a salt of a second metal to a second flow path of the flow type reaction apparatus, making it merge with the solution which contains metal nanoparticles of the first metal to obtain a mixed solution, and applying plasma to the mixed solution to cover the metal nanoparticles of the first metal by the second metal.
摘要:
The present invention provides a metal nanoparticle composite having a structure, in which metal nanoparticles are dispersed in an organic structure, the organic structure including: a structure of a porous coordination polymer (PCP) or metal-organic framework (MOF) containing a metal and a polyvalent ligand capable of reducing the metal; and carbon.
摘要:
The catalyst disclosed is a catalyst including palladium-ruthenium alloy fine particles in which palladium and ruthenium form a solid solution. The palladium-ruthenium alloy fine particles used in this catalyst can be produced by a production method including the step of maintaining a solution containing a protective agent, a reducing agent, a palladium compound or palladium ions, and a ruthenium compound or ruthenium ions at a temperature equal to or higher than a predetermined temperature.