摘要:
Nickel based catalyst structures are described herein that include a plurality of metal oxides formed as crystalline phases within the catalyst structures. Each metal oxide of a catalyst structure includes nickel and/or aluminum, where one or more metal oxides includes a nickel aluminum oxide, and the one or more nickel aluminum oxides is greater than 50% by weight of the crystalline phases within the catalyst structure. The catalyst structures further have specific surface areas of at least 13 m 2 /g. Mixed nickel aluminates such as the spinel phase, NiAl 2 O 4 , and NiAl 10 O 16 are shown to have a high stability in reforming reactions. The catalyst structures are resistant to high concentrations of sulfur and are effective in reforming operations for converting methane and other light hydrocarbons to hydrogen and one or more other components. For example, the catalyst structures are effective in coal and biomass gasification systems for the forming and cleanup of synthetic gas.
摘要翻译:没有被描述在镍基催化剂结构包括形成为催化剂结构内的结晶相的金属氧化物的复数。 催化剂结构中的每一个金属氧化物包括镍和/或铝,其中一个或多个金属氧化物包括氧化镍铝,和所述一个或多个镍铝的氧化物大于50重量%的催化剂结构内的晶相的。 催化剂结构还具有至少13米2 /克的比表面积。 混合的镍铝酸盐:如尖晶石相,的NiAl 2 O 4和NiAl金属10 O 16被示出为具有在重整反应的高稳定性。 所述的催化剂结构,以硫的高浓度的抗性和能有效地用于将甲烷和其它轻质烃类和氢的一种或多种其它组分的重整操作。 例如,催化剂结构用于成形和合成气体的净化有效煤和生物质气化系统。
摘要:
The invention relates to a method for producing syngas in an alternating operation between two operating modes. The method has the steps of providing a flow reactor; endothermically reacting carbon dioxide with hydrocarbons, water, and/or hydrogen in the flow reactor, at least carbon monoxide being formed as the product, under the effect of heat generated electrically by one or more heating elements (110, 111, 112, 113); and at the same time exothermically reacting hydrocarbons, carbon monoxide, and/or hydrogen as reactants in the flow reactor. The exothermic reaction releases a heat quantity Q1, the electric heating of the reactor releases a heat quantity Q2, and the exothermic reaction and the electric heating of the reactor are operated such that the sum of Q1 and Q2 is greater than or equal to the heat quantity Q3 which is required for an equilibrium yield Y of the endothermic reaction of ≥ 90%.
摘要:
A hydrogen purifier (100) includes: a shift conversion catalyst (5a) which reduces, through a shift reaction, carbon monoxide contained in a hydrogen-containing gas; and a methanation catalyst (6a) which reduces, through a methanation reaction, carbon monoxide contained in the hydrogen-containing gas that has passed through the shift conversion catalyst (5a). The shift conversion catalyst (5a) and the methanation catalyst (6a) are heat exchangeable with each other via a first partition wall (8), and a flow direction of the hydrogen-containing gas that passes through the shift conversion catalyst (5a) is opposite to a flow direction of the hydrogen-containing gas that passes through the methanation catalyst (6a).
摘要:
Hydrotalcite-like compound of the formula (I): [Rh x Mg y Al w (OH) 2 ] (3x+2y+3w-2)+ (A 2- ) (3x+2y+3w-2)/2 , k H 2 O (I); catalyst synthesis process involving such a compound and the use of this catalyst for hydrocarbons reforming and for ethanol reforming.
摘要翻译:式(I)的水滑石样化合物:[Rh x Mg y Al w(OH)2](3x + 2y + 3w-2)+(A 2-)(3x + 2y + 3w-2)/ 2, k H 2 O€ƒ€ƒ€ƒ€ƒ(I); 涉及这种化合物的催化剂合成方法以及该催化剂用于烃重整和乙醇重整的用途。
摘要:
A method and catalysts and fuel processing apparatus for producing a hydrogen-rich gas, such as a hydrogen-rich syngas are disclosed. According to the method a CO-containing gas, such as a syngas, contacts a water gas shift ('WGS') catalyst, in the presence of water, preferably at a temperature of less than about 450 °C to produce a hydrogen-rich gas, such as a hydrogen-rich syngas. Also disclosed is a water gas shift catalyst formulated from: a) at least one of Rh, Ni, Pt, their oxides and mixtures thereof; b) at least one of Cu, Ag, Au, their oxides and mixtures thereof; and c) at least one of K, Cs, Sc, Y, Ti, Zr, V, Mo, Re, Fe, Ru, Co, Ir, Pd, Cd, In, Ge, Sn, Pb, Sb, Te, La, Ce, Pr, Nd, Sm, Eu, their oxides and mixtures thereof. Another disclosed catalyst formulation comprises Rh, its oxides or mixtures thereof, Pt, its oxides or mixtures thereof and Ag, its oxides or mixtures thereof. The WGS catalyst may be supported on a carrier, such as any one member or a combination of alumina, zirconia, titania, ceria, magnesia, lanthania, niobia, zeolite, pervoskite, silica clay, yttria and iron oxide. Fuel processors containing such water gas shift catalysts are also disclosed.
摘要:
A method and catalysts for producing a hydrogen-rich syngas are disclosed. According to the method a CO-containing gas contacts a water gas shift (WGS) catalyst, in the presence of water, preferably at a temperature of less than about 450° C. to produce a hydrogen-rich syngas. Also disclosed is a water gas shift catalyst formulated from: a) Pt, its oxides or mixtures thereof, b) at least one of Fe and Rh, their oxides and mixtures thereof, and c) at least one member selected from the group consisting of Sc, Y, Ti, Zr, V, Nb, Ta, Mo, Re, Co, Ni, Pd, Ge, Sn, Sb, La, Ce, Pr, Nd, Sm, and Eu, their oxides and mixtures thereof. The WGS catalyst may be supported on a carrier, such as any one member or a combination of alumina, zirconia, titania, ceria, magnesia, lanthania, niobia, yttria and iron oxide. Fuel processors containing such water gas shift catalysts are also disclosed.
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:
A catalyst for thermochemical fuel production, which is formed from a perovskite oxide and by which fuel can be produced thermochemically, and thermochemical fuel production are provided. The catalyst for thermochemical fuel production is a catalyst for thermochemical fuel production, which is used for producing the fuel from thermal energy by using a two-step thermochemical cycle of a first temperature and a second temperature that is equal to or lower than the first temperature, wherein the catalyst is formed from a perovskite oxide having a compositional formula of AXO 3±´ (provided that, 0‰¤´‰¤1). Here, A represents one or more of a rare-earth element (excluding Ce), an alkaline earth metal element, and an alkali metal element, X represents one or more of a transition metal element and a metalloid element, and O represents oxygen.
摘要:
The disclosure relates to a method of utilizing a catalyst system for an oxidation process on a gaseous hydrocarbon stream with a mitigation of carbon accumulation. The system is comprised of a catalytically active phase deposited onto an oxygen conducting phase, with or without supplemental support. The catalytically active phase has a specified crystal structure where at least one catalytically active metal is a cation within the crystal structure and coordinated with oxygen atoms within the crystal structure. The catalyst system employs an optimum coverage ratio for a given set of oxidation conditions, based on a specified hydrocarbon conversion and a carbon deposition limit. Specific embodiments of the catalyst system are disclosed.