摘要:
An ammonia slip catalyst having an SCR catalyst and an oxidation catalyst comprising at least two metals, each of which is selected from a specific group, and a substrate upon which at least oxidation catalyst is located is described. The ammonia slip catalyst can have dual layers, with one of the layers containing an SCR catalyst, a second layer containing the oxidation catalyst with comprises at least two metals, each of which is selected from a specific group, and the ammonia slip catalyst does not contain a platinum group metal. Methods of making and using the ammonia slip catalyst to reduce ammonia slip are described.
摘要:
Disclosed are hybrid synthesis gas conversion catalysts containing at least one Fischer-Tropsch component and at least one acidic component deposited on a monolith catalyst support for use in synthesis gas conversion processes and methods for preparing the catalysts. Also disclosed are synthesis gas conversion processes in which the hybrid synthesis gas conversion catalysts are contacted with synthesis gas to produce a hydrocarbon product containing at least 50 wt % C5+ hydrocarbons. Also disclosed are synthesis gas conversion processes in which at least one layer of Fischer-Tropsch component deposited onto a monolith support is alternated with at least one layer of acidic component in a fixed bed reactor.
摘要:
A solid catalyst, such as a molecular sieve catalyst or solid acid catalyst, is supported by a binder, such as amorphous silica or alumina, wherein the binder is charged with metal ions to form an ion-modified binder. The ion-modified binder is capable of attachment to polar contaminants and inhibit their contact with the catalyst. The catalyst can be a zeolite and can be the catalyst for an alkylation reaction, such as the alkylation of benzene with ethylene.
摘要:
The present invention relates to a process for the skeletal isomerization of unsaturated linear fatty acids to branched fatty acids which comprises contacting said unsaturated linear fatty acids with at least one large pore zeolite catalyst wherein said at least one zeolite catalyst comprises a material having a three dime nsional channel structure having a pore diameter of at least 6.0 ANGSTROM . In another embodiment, the invention relates to a process for the skeletal isomerization and hydrogenation of unsaturated linear fatty acids to saturated branched fatty acids which comprises contacting said unsaturated linear fatty acids with at least one metal-zeolite catalyst.
摘要:
A catalyst for oxidising ammonia comprises a selective catalytic reduction (SCR) catalyst and a composite heterogeneous extruded honeycomb having longitudinally extending parallel channels, which channels being defined in part by channel walls having a total longitudinal length, wherein the channel walls comprise a pore structure including a periodic arrangement of porous cells embedded in an inorganic matrix component, at least some of which porous cells are defined at least in part by an active interface layer of a catalytically active material comprising a precious metal supported on particles of a support material.
摘要:
The synthesis system (S) according to the present invention comprises a high-pressure container (1) into which the support material (17) and metal precursor (18) are placed and having a body (13) resistant to high pressure; a carbondioxide source (2) for supplying carbondioxide gas into the high-pressure container (1); a pump (3) for delivering carbondioxide into the high-pressure container (1); a temperature regulation unit (6) regulating the temperature of the high-pressure container (1); at least one heating furnace wherein the support material (17) is heated and subjected to calcination after the metal precursor (18) is dissolved in carbondioxide in the supercritical phase and adsorbed into the support material (17). The synthesis method using the synthesis system (S) comprises the steps of introducing (a) the metal precursor (18) and support material (17) into the high-pressure container (1); supplying carbondioxide into the high-pressure container (1); allowing the metal precursor (18) to be dissolved in carbondioxide and adsorbed (b) by the support material (17); heating the support material (17) inside the said furnace and subjecting it to a calcination (c) process so as to allow the metal precursor (18) adsorbed by the support material (17) to oxidize.
摘要:
A new family of crystalline aluminosilicate zeolites has been synthesized that has been designated UZM-43. These zeolites are similar to previously known ERS-10, SSZ-47 and RUB-35 zeolites but are characterized by unique x-ray diffraction patterns and compositions and have catalytic properties for carrying out various hydrocarbon conversion processes. Catalysts made from these zeolites are useful in hydrocarbon conversion reactions.
摘要:
In a process for activating a hydroalkylation catalyst, a catalyst precursor comprising a solid acid component and a compound of a hydrogenation metal is heated at a heating rate of less than 50°C/ hour in the presence of hydrogen to an activation temperature in a range from 100°C to 260°C and then the heated catalyst precursor is treated with hydrogen for a duration effective to reduce at least a portion of the metal compound to an elemental form. The activated catalyt may be used to make cycloalkylaromatic compounds from aromatic compounds and hydrogen by hydroalkylation, as well as to make phenol and cyclohexanone by further oxidizing the hydroalkylation product from benzene to the hydroperoxide and cleaving that to a mixture of phenol and cyclohexanone.
摘要:
The invention relates to alternative DeNOx catalyst systems for treating exhaust gases containing nitrogen oxides, said catalyst comprising a mass catalyst which consists of a zeolite and is an extrudate in the form of a honeycomb body. The invention also relates to uses of said catalyst system.