摘要:
Dispersion of noble metal-supported photocatalyst particles, which exhibits high photocatalytic activity, and also has stable dispersibility that enables prevention of precipitation of photocatalyst particles in a dispersion medium; a method for producing the same; a hydrophilizing agent; and a photocatalytic functional product.
摘要:
The present invention provides a photocatalyst composite in which brittleness and ease of coming-off of a photocatalyst layer are reduced.The photocatalyst composite includes a base material, at least the surface of which is formed of a plastic-deformable solid material; an inorganic particle layer containing inorganic particles disposed on the surface of the base material; and a photocatalyst layer containing a photocatalyst disposed on the surface of the inorganic particle layer; wherein at least one portion of voids in the inorganic particle layer is filled with the solid material, and the surface of the inorganic particle layer is coated with the solid material except for at least one portion.
摘要:
An object of the present invention is to provide a catalyst which, in the FT process, exhibits a high chain growth probability, and a high catalytic activity, can stably and smoothly promote the reaction, exhibits a high productivity of C5+, and can efficiently produce liquid hydrocarbons, and a process therefore. The invention relates to a hydrocarbon-producing catalyst obtainable by supporting a ruthenium compound on a support composed of a manganese oxide and an aluminum oxide, and which satisfies at least one of characteristics (1) and (2): (1) the catalyst being treated with an aqueous alkaline solution and subsequently subjected to calcination treatment in the air at 150 to 500° C., (2) the aluminum oxide being an aluminum oxide wherein pore volume formed by pores having a pore diameter of 8 nm or more accounts for 50% or more of total pore volume.
摘要:
An electrocatalyst composition for use in an electrochemical fuel cell is disclosed. The electrocatalyst composition comprises (1) an electrocatalyst support comprising a carbon-containing species and at least one hydrogen peroxide and/or oxygen radical decomposition catalyst, and (2) a noble metal electrocatalyst supported on the electrocatalyst support. In addition, the at least one hydrogen peroxide and/or oxygen radical decomposition catalyst comprises transition metal inclusions within the electrocatalyst support, and the electrocatalyst support does not comprise any nitrogen-containing species or metal oxides.
摘要:
An inside layer including zeolite and an outside layer including alumina and Pd are formed in a layered shape on a carrier, and Ag and Bi are simultaneously allowed to be carried on the inside and outside layers through impregnation. Thus, production of an alloy through a reaction between Pd and Ag can be suppressed by Bi.
摘要:
The present invention provides a crystalline, hydroxide containing double metal cyanide (DMC) catalyst of the formulae (I) or (II), M1x[M2(CN)6]yOH.L (I) M1x[M2(CN)6]y.zM1(OH)q.L (II) wherein M1 represents a metal selected from Zn+2, Fe+2, Ni+2, Mn+2, Co+2, Sn+2, Pb+2, Fe+3, Mo+4, Mo+6, Al+3, V+4 V+5, Sr+2, W+4, W+6, Cu+2 and Cr+3, Mn2 represents a metal selected from Fe+2, Fe+3, Co+2, Co+3, Cr+2, Cr+3, Mn+2, Mn+3, Ir+3, Ni+2, Rh+3, Ru+2, V+4 and V+5, L represents an organic ligand and x, y and q are chosen to maintain electroneutrality. Further provided are processes for the production of the inventive DMC catalysts. The crystalline, hydroxide containing DMC catalysts of the present invention may find use in the preparation of polyols, such as polyether polyols.
摘要:
The composite oxide and the composite oxide carrier are manufactured by the precursor forming step and firing step. The precursor forming step includes high speed mixing means. The composite oxide catalyst is obtained by preparing a composite of catalytic components simultaneously with the formation of the precursor of composite oxide in the step of forming the precursor of composite oxide. The composite oxide and the composite oxide carrier are composed of a composite oxide in which at least one of cerium and zirconium, and aluminium disperse with extremely high homogeneity. With this structure, the heat resistance of the carrier is improved and consequently, enlargement of particles of the composite oxide defining the carrier, and sintering of adjacent particles of the composite oxide can be restrained, whereby the catalyst using the composite oxide carrier in accordance with the present invention is excellent in heat resistance. With the present invention, the carrier is not limited to a general catalyst carrier. The carrier may be interpreted to indicate general formed bodies. For example, the carrier with the present invention can be also used as materials for sensors and electrodes, optical materials, semiconductors and structure materials. Furthermore, the carrier can be used for a three-way catalyst, NOx catalyst or oxidation catalyst or a part thereof, and a promoter.
摘要:
A mixed oxide solid composition of formula (I):Mo.sub.12 W.sub.a Bi.sub.b Fe.sub.c Co.sub.d Ni.sub.e Si.sub.f K.sub.g Sn.sub.h O.sub.x (I)where O.ltoreq.a.ltoreq.5, 0.5.ltoreq.b.ltoreq.5, 0.1.ltoreq.c.ltoreq.10, 0.5.ltoreq.d.ltoreq.10, 0.ltoreq.e.ltoreq.10, 0.ltoreq.f.ltoreq.15, 0.ltoreq.g.ltoreq.1, 0.ltoreq.h.ltoreq.2 and x is the quantity of oxygen bonded to the other elements and depends on their oxidation states, is used in the manufacture of acrolein by oxidizing propylene, the solid composition reacting with propylene according to the redox reaction (1):solid.sub.oxidized +propylene.fwdarw.solid.sub.reduced +acrolein(I)To manufacture acrolein, gaseous propylene is passed over a solid composition of formula (I), to conduct the redox reaction (1) by operating at a temperature of 200 to 600.degree. C., at a pressure of 1.01.times.10.sup.4 to 1.01 to 10.sup.6 Pa (0.1 to 10 atmospheres) and with a residence time of 0.01 second to 90 seconds, in the absence of molecular oxygen.
摘要翻译:式(I)的混合氧化物固体组合物:Mo12WaBibFecCodNieSifKgSnhOx(I)其中O = 5,0.5 = b = 5,0.1,c = 10,0.5, d = 10,0 = 10,0 固体还原+丙烯醛(I )为了制备丙烯醛,气态丙烯通过式(I)的固体组合物,通过在200至600℃的温度下操作,在1.01×10 4至1.01至106的压力下进行氧化还原反应(1) Pa(0.1〜10个大气压),停留时间为0.01秒〜90秒,不存在分子氧。
摘要:
A catalyst being formed of a porous supporter supporting alkali metals, Ti and a noble metal, or further supporting at least one of rare earth metal and magnesium, being disposed in a flow passage of an internal combustion engine, and being used to purify NOx contained in the exhaust gas. The above catalyst has NOx resistance to exhaust gas burnt with a rich condition and with a lean condition and a high resistivity to poisoning by SOx.
摘要:
This invention relates to a catalyst for hydrogenation and/or dehydrogenation having an improved resistance against deactivation by sulfur compounds, comprising at least one hydrogenation component, at least one metal-oxide containing component and at least one component acting as a support material, in which at least a part of the hydrogenation component and a part of the metal-oxide containing component are present on said support material as separate particles, the particles of the hydrogenation component and the particles of the metal-oxide containing component being homogeneously distributed in the catalyst.