摘要:
Provide is a functional structural body that can suppress aggregation of metal oxide nanoparticles and prevent functional loss of metal oxide nanoparticles, and thus exhibit a stable function over a long period of time. A functional structural body (1) includes: a skeletal body (10) of a porous structure composed of a zeolite-type compound; and at least one type of metal oxide nanoparticles (20) containing a perovskite-type oxide present in the skeletal body (10), the skeletal body (10) having channels (11) that connect with each other, and the metal oxide nanoparticles (20) being present at least in the channels (11) of the skeletal body (10).
摘要:
A method for preparing a reaction product including an aryl-functional silane includes sequential steps (1) and (2). Step (1) is contacting, under silicon deposition conditions, (A) an ingredient including (I) a halosilane such as silicon tetrahalide and optionally (II) hydrogen (H2); and (B) a metal combination comprising copper (Cu) and at least one other metal, where the at least one other metal is selected from the group consisting of gold (Au), cobalt (Co), chromium (Cr), iron (Fe), magnesium (Mg), manganese (Mn), nickel (Ni), palladium (Pd), and silver (Ag); thereby forming a silicon alloy catalyst comprising Si, Cu and the at least one other metal. Step (2) is contacting the silicon alloy catalyst and (C) a reactant including an aryl halide under silicon etching conditions.
摘要:
Provided is a catalyst composition using other metals different from noble metals as a catalytic activity component and which has an excellent catalytic activity even after a thermal duration treatment. Provided are an exhaust gas purifying catalyst composition which includes ceria-zirconia particles with a feature in that a peak arising from (111) plane is divided into two peak tops in an XRD pattern and in which a transition metal including at least one of Cu, Cr, Fe, Mn, Co, Ni, and Ag is supported on the ceria-zirconia particles, and a catalyst using the exhaust gas purifying catalyst composition.
摘要:
Provided was a monolithic catalyst for synthesizing an oxalate by carbon monoxide (CO) gaseous-phase coupling, a preparation method and the use thereof. In the catalyst, a ceramic honeycomb or a metal honeycomb was used as skeletal carrier, metal oxides were used as a carrier coating, precious metals Pt, Pd, Ir, Rh were used as active ingredients, as well as Fe, Co, Ni were used as additives, wherein the carrier coating accounts for 5 to 50 wt. % of the honeycomb carrier; the active ingredients of the catalyst account for 0.1 to 5 wt. % of the carrier coating; the additives of the catalyst account for 0.3 to 10 wt. % of the carrier coating; and the atomic ratio of the active ingredients to the additives was 0.1 to 3. the reaction for synthesizing the oxalate was carried out in a fixed bed reactor, wherein, N2 was used as a carrier gas. The volume ratio of N2:CO:Alkyl nitrite was 20-80:5-60:10-40, and the retention time was 0.5-10 s.
摘要:
A method for producing a shell catalyst which is suitable for the synthesis of alkenyl carboxylic acid esters, in particular for producing vinyl acetate monomer (VAM) from ethylene or allyl acetate monomer from propylene by means of oxy-acetylation. Also, a shell catalyst that can be obtained by the method according to the invention, as well as the use of the shell catalyst produced using the method for producing alkenyl carboxylic acid esters, in particular vinyl acetate monomer (VAM) and allyl acetate monomer.
摘要:
A process has been developed for preparing a Fischer-Tropsch catalyst precursor and a Fischer-Tropsch catalyst made from the precursor. The process includes contacting a gamma alumina catalyst support material with a first solution containing a compound containing zinc and optionally containing P, Ti, V, Co, Ga, Ge, Mo, W and/or Pr to obtain a modified catalyst support material. The modified catalyst support material is calcined at a temperature of at least 500° C. The calcined modified catalyst support has a pore volume of at least 0.4 cc/g. The modified catalyst support is less soluble in acid solutions than an equivalent unmodified catalyst support. The modified catalyst support is contacted with a second solution which includes a precursor compound of an active cobalt catalyst component to obtain a catalyst precursor. The catalyst precursor is reduced to activate the catalyst precursor to obtain the Fischer-Tropsch catalyst. The catalyst has enhanced hydrothermal stability as measured by losing no more than 20% of its pore volume when exposed to water vapor.
摘要:
The catalyst may be used to obtain hydrogen or synthesis gas for chemical industry in processes of partial oxidation, steam reforming, and autothermal reforming of a hydrocarbon feed. The catalyst of oxidative conversion of gaseous hydrocarbons to form carbon monoxide and hydrogen contains platinum-group metals and an oxide composition and characterized in that the platinum-group metals include Pt, Pd, and Rh and the oxide composition is obtained from a mixture of a sol of Al, Si, and Zr hydroxides with particles of Ni, Mg and/or Ce oxides with a size of 5-30 nm, that were obtained by spray-pyrolysis of a solution of Ni, Mg and/or Ce salts.
摘要:
An exhaust gas purification catalyst contains a first catalyst in which an oxide of general formula (1): LaxM1-xM′O3-δ (where La is lanthanum, M is at least one selected from a group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M′ is at least one selected from a group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), δ is the amount of oxygen defect, and x and δ satisfy 0
摘要:
A catalyst for the epoxidation of an olefin comprising a carrier and deposited on the carrier, silver, a promoting amount of one or more promoters selected from the group consisting of alkali metals and rhenium and a promoting amount of nickel, wherein the nickel is added as a nickel compound or nickel complex during the initial impregnation along with the silver and other promoters; including a process for preparing the catalyst; a process for preparing an olefin oxide by reacting a feed comprising an olefin and oxygen in the presence of the catalyst; and a process for preparing a 1,2-diol, a 1,2-diol ether, a 1,2-carbonate, or an alkanolamine.
摘要:
Disclosed is a hydrocarbon gas reforming supported catalyst, and methods for its use, that includes a catalytic material capable of catalyzing the production of a gaseous mixture comprising hydrogen and carbon monoxide from a hydrocarbon gas, and a support material comprising an alkaline earth metal/metal oxide compound having a structure of D-E, wherein D is a M1 or M1M2, M1 and M2 each individually being an alkaline earth metal selected from the group consisting of Mg, Ca, Ba, and Sr, E is a metal oxide selected from the group consisting of Al2O4, SiO2, ZrO2, TiO2, and CeO2, wherein the catalytic material is attached to the support material.
摘要翻译:公开了一种烃气重整负载催化剂及其使用方法,其包括能够催化由烃气体生产包括氢气和一氧化碳的气体混合物的催化材料,以及包含碱土金属/金属的载体材料 具有DE结构的氧化物化合物,其中D为M1或M1M2,M1和M2各自为选自Mg,Ca,Ba和Sr的碱土金属,E为选自以下的金属氧化物: 由Al 2 O 4,SiO 2,ZrO 2,TiO 2和CeO 2组成,其中催化材料附着到载体材料上。