摘要:
A metal catalyst is formed by vaporizing a quantity of metal and a quantity of carrier forming a vapor cloud. The vapor cloud is quenched forming precipitate nanoparticles comprising a portion of metal and a portion of carrier. The nanoparticles are impregnated onto supports. The supports are able to be used in existing heterogeneous catalysis systems. A system for forming metal catalysts comprises means for vaporizing a quantity of metals and a quantity of carrier, quenching the resulting vapor cloud and forming precipitate nanoparticles comprising a portion of metals and a portion of carrier. The system further comprises means for impregnating supports with the nanoparticles.
摘要:
A method of synthesizing a doped carbon composite includes preparing a solution having a carbon source material and a heteroatom containing additive, evaporating the solution to yield a plurality of powders, and subjecting the plurality of powders to a heat treatment for a duration of time effective to produce the doped carbon composite.
摘要:
A metal compound catalyst is formed by vaporizing a quantity of catalyst material and a quantity of carrier thereby forming a vapor cloud, exposing the vapor cloud to a co-reactant and quenching the vapor cloud. The nanoparticles are impregnated onto supports. The supports are able to be used in existing heterogeneous catalysis systems. A system for forming metal compound catalysts comprises means for vaporizing a quantity of catalyst material and a quantity of carrier, quenching the resulting vapor cloud, forming precipitate nanoparticles comprising a portion of catalyst material and a portion of carrier, and subjecting the nanoparticles to a co-reactant. The system further comprises means for impregnating the of supports with the nanoparticles.
摘要:
Catalysts and methods for their manufacture and use for the synthesis of dimethyl ether from syngas are disclosed. The catalysts comprise ZnO, CuO, ZrO2, alumina and one or more of boron oxide, tantalum oxide, phosphorus oxide and niobium oxide. The catalysts may also comprise ceria. The catalysts described herein are able to synthesize dimethyl ether directly from synthesis gas, including synthesis gas that is rich in carbon monoxide.
摘要:
A home appliance is provided that may include a photocatalyst for visible rays. The home appliance may include a case that defines an exterior, and a photocatalyst disposed on an inner or outer surface of the case. The photocatalyst may react or be activated by light having a visible-ray wavelength. Silver phosphate (Ag3PO4) and titanium dioxide (TiO2) may be mixed to a set weight part ratio.
摘要翻译:提供了可以包括用于可见光的光催化剂的家用电器。 家用电器可以包括限定外部的壳体和设置在壳体的内表面或外表面上的光催化剂。 光催化剂可能由具有可见光波长的光反应或活化。 可以将磷酸银(Ag 3 PO 4)和二氧化钛(TiO 2)混合至固定重量份。
摘要:
Methods for organic compound conversion are disclosed. Particular methods include providing a first mixture comprising ≧10.0 wt % of at least one oxygenate, based on the weight of the first mixture; contacting said first mixture in at least a first moving bed reactor with a catalyst under conditions effective to covert at least a portion of the first mixture to a product stream comprising water, hydrogen, and one or more hydrocarbons; and separating from said product stream (i) at least one light stream and ii) at least one heavy stream, wherein the method is characterized by a recycle ratio of ≦5.0.
摘要:
Transition metal carbide, nitride, phosphide, sulfide, or boride nanoparticles can be made by transforming metal oxide materials coated in a ceramic material in a controlled environment. The coating prevents sintering while allowing the diffusion of reactive gases through the inorganic matrix that can then alter the metal nanoparticle oxidation state, remove oxygen, or intercalate into the lattice to form a carbide, nitride, phosphide, sulfide, or boride.
摘要:
Provided is a catalyst composition suitable for curing a fluoroelastomer, the catalyst composition comprising an anion of Formula III: wherein each Rf independently is selected from R—CF2 and a perfluoroalkyl group having from 1 to 8 carbon atoms. R is selected from H, a halogen, an alkyl group having up to 8 carbon atoms, an aryl group having up to 8 carbon atoms, and a cycloalkyl group having up to 8 carbon atoms. The subscript n is a positive integer. The catalyst composition is free of hydrocarbon containing alcohol. In specific instances, Rf may be CF3.
摘要:
The present invention relates to a process to make light olefins, in a combined XTO-OC process, from an oxygen-containing, halogenide-containing or sulphur-containing organic feedstock comprising:a) providing a catalyst comprising zeolitic molecular sieves containing 10 member and larger channels in their microporous structure,b) providing an XTO reaction zone, an OC reaction zone and a catalyst regeneration zone, said catalyst circulating in the three zones, such that at least a portion of the regenerated catalyst is passed to the OC reaction zone, at least a portion of the catalyst in the OC reaction zone is passed to the XTO reaction zone and at least a portion of the catalyst in the XTO reaction zone is passed to the regeneration zone; c) contacting said oxygen-containing, halogenide-containing or sulphur-containing organic feedstock in the XTO reactor with the catalyst at conditions effective to convert at least a portion of the feedstock to form a XTO reactor effluent comprising light olefins and a heavy hydrocarbon fraction; d) separating said light olefins from said heavy hydrocarbon fraction; e) contacting said heavy hydrocarbon fraction in the OC reactor with the catalyst at conditions effective to convert at least a portion of said heavy hydrocarbon fraction to light olefins.
摘要:
The present invention relates to hierarchical structured nanotubes, to a method for preparing the same and to an application for the same, wherein the nanotubes include a plurality of connecting nanotubes for constituting a three-dimensional multi-dendrite morphology; and the method includes the following steps: (A) providing a polymer template including a plurality of organic nanowires; (B) forming an inorganic layer on the surface of the organic nanowires in the polymer template; and (C) performing a heat treatment on the polymer template having the inorganic layer on the surface so that partial atoms of the organic nanowires enter the inorganic layer.