Abstract:
Die Erfindung betrifft einen Katalysator zur Methanisierung von Kohlenmonoxid und/oder Kohlendioxid, umfassend Aluminiumoxid, eine Ni-Aktivmasse sowie Fe und Mn und der dadurch gekennzeichnet ist, dass das molare Ni/Fe-Verhältnis im Katalysator 5,0 bis 10,0, bevorzugt 5,3 bis 7,0 und besonders bevorzugt 5,4 bis 5,7 beträgt. Der Katalysator weist bevorzugt ein molares Ni/Mn-Verhältnis von 5,0 bis 32,0, bevorzugt 9,0 bis 10,0 auf. Der Katalysator zeichnet sich durch eine verbesserte Aktivität kombiniert mit einer verbesserten Stabilität aus. Die Erfindung betrifft auch ein Verfahren zur Herstellung eines erfindungsgemäßen Katalysators umfassend die Schritte: a) Kopräzipitation aus einer Lösung, die AI, Ni, Mn und Fe in gelöster Form enthält, um einen Niederschlag zu erhalten, b) Isolieren des Niederschlags aus Schritt a), c) Trocknen des isolierten Niederschlags aus Schritt b) und d) Kalzinieren des getrockneten Niederschlags aus Schritt c).
Abstract:
A method for hydrogenating carbon dioxide to methane comprises providing a rhodium photocatalyst having rhodium nanoparticles on a metal oxide support, conditioning the rhodium photocatalyst, exposing the rhodium photocatalyst to hydrogen gas and carbon dioxide gas, and illuminating the rhodium photocatalyst with blue light or ultraviolet light. In some embodiments, the rhodium nanoparticles are in the form of nano-cubes and the intensity of illumination is sufficient to cause the reaction rate of methane to have a super-linear dependence on illumination intensity,
Abstract:
The present invention provides for a method and apparatus for reducing carbon dioxide by exposing the carbon dioxide to a metal-free catalyst, thus converting the carbon dioxide to a reduced product. In some embodiments, the metal-free catalyst includes, without limitation, various nanomaterials, quantum dots, oxides, oxides, and combinations thereof. The metal-free catalyst may further be supported on a substrate to form a complex. The metal-free catalyst may further selectively reduce carbon dioxide without mediating hydrogen evolution reactions.
Abstract:
본 발명은 상온 및 상압 조건하에서 이산화탄소와 수소를 이용한 메탄가스 합성방법 및 합성장치에 관한 것으로, 보다 구체적으로는 상온 및 상압 조건하에서 촉매-유전체장벽방전(DBD) 플라즈마를 이용하여 이산화탄소(CO 2 )와 수소(H 2 )만으로 합성천연가스인 메탄(CH 4 , Methane)가스를 합성하는 방법에 관한 것이다. 본 발명의 메탄가스 합성방법 및 합성장치에 의하면, 상온 및 상압 조건하에서 촉매-유전체장벽방전(DBD) 플라즈마를 이용하여 이산화탄소(CO 2 )와 수소(H 2 )만으로 합성천연가스인 메탄(CH 4 , Methane)가스를 합성할 수 있는 효과가 있다. 또한, 본 발명의 메탄가스 합성방법 및 합성장치에 의하면, 메탄가스 합성 공정을 수행하기 위한 별도의 가열 장비 및 가압장비를 사용하지 않아 제조비용이 낮을 뿐만 아니라, 공정 수행 상의 위험성이 없어 부가가치가 높은 장점이 있다.
Abstract:
Methods of preparing olefins and methanol from syngas are provided. Methods include hydrogenation of carbon dioxide (CO 2 ) via a reverse water gas shift (RWGS) reaction, separation of unreacted CO 2 , followed by simultaneous Fischer-Tropsch synthesis (FT) and methanol synthesis. Catalysts include Zn-Cu-Zr-O.
Abstract:
A process for producing a substitute natural gas, the process comprising the steps of: (1) providing a synthesis gas comprising hydrogen and carbon monoxide; (2) forming a hydrogen-enriched synthesis gas; (3) subjecting the hydrogen-enriched synthesis gas to a methanation reaction to convert at least a portion of the gas into methane thereby forming a methane-enriched gas; and (4) recovering from the methane-enriched gas a methane-containing gas, wherein step (2) comprises providing a hydrogen gas and combining the hydrogen gas with the synthesis gas.
Abstract:
The present disclosure provides oxidative coupling of methane (OCM) systems for small scale and world scale production of olefins. An OCM system may comprise an OCM subsystem that generates a product stream comprising C 2+ compounds and non-C 2+ impurities from methane and an oxidizing agent. At least one separations subsystem downstream of, and fluidically coupled to, the OCM subsystem can be used to separate the non-C 2+ impurities from the C 2+ compounds. A methanation subsystem downstream and fluidically coupled to the OCM subsystem can be used to react H 2 with CO and/or CO 2 in the non-C 2+ impurities to generate methane, which can be recycled to the OCM subsystem. The OCM system can be integrated in a non-OCM system, such as a natural gas liquids system or an existing ethylene cracker.
Abstract:
In the production of methane, wherein hydrogen is generated from water by electrolysis, a total product stream is withdrawn from the electrolysis, which contains hydrogen, oxygen and water. The total product stream then is supplied to a reactor in which the hydrogen is converted to methane with carbon dioxide in at least one methanation stage in a heterogeneously catalyzed reaction.
Abstract:
A hybrid plant and method for producing liquid fuel product from hydrogen and carbon monoxide containing streams produced by gasifying solid carbonaceous feedstock and steam reforming of light fossil fuels. When a gasification unit in the hybrid plant is operating at reduced capacity or is not operational, oxygen that would have been used in the gasification unit is diverted to a light fossil fuel conversion unit containing an autothermal reformer to increase FL-rich syngas flow to a liquid fuel production unit and maintain liquid fuel production at near nameplate capacity.