Abstract:
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.
Abstract:
Provided is a catalyst composition for treating exhaust gas comprising a blend of a first component and second component, wherein the first component is an aluminosilicate or ferrosilicate molecular sieve component wherein the molecular sieve is either in H+ form or is ion exchanged with one or more transition metals, and the second component is a vanadium oxide supported on a metal oxide support selected from alumina, titania, zirconia, ceria, silica, and combinations thereof. Also provided are methods, systems, and catalytic articles incorporating or utilizing such catalyst blends.
Abstract:
The subject of the present invention is a catalyst for the synthesis of gasolines from methanol or its homologues, in particular its nanostructural matrix having high catalytic resistance to water, even as high as above 100 ppm and making it possible to appropriately deposit active sites onto it, which results in high and long-lasting activity of the catalyst and its selectivity towards increasing the degree of hydrocarbons isomerisation to increase the octane number of the gasoline to be obtained.
Abstract:
There is disclosed iron-containing aluminosilicate zeolites having both framework iron and iron cations on the ion-exchange sites. There is also disclosed a direct synthesis method of making an iron-containing aluminosilicate zeolite, which does not require the use of an intermediate step, such as ion-exchange or impregnation. In addition, there is disclosed a method of using the iron-containing aluminosilicate zeolite disclosed herein in a selective catalytic reduction reaction, typically in the presence of ammonia, to reduce or remove nitric oxides from exhaust emissions.
Abstract:
Compositions for reduction of NO x generated during a catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise a fluid catalytic cracking catalyst composition, preferably containing a Y-type zeolite, and a NO x reducing zeolite having a pore size ranging from about 2 to about 7.2 Angstoms and a SiO 2 to Al 2 O 3 molar ratio of less than about 500 and being stabilized with a metal or metal ion selected from the group consisting of zinc, iron and mixtures thereof. Preferably, the NO x reducing zeolite particles are bound with an inorganic binder to form a particulate composition. In the alternative, the NO x reducing zeolite particles are incorporated into the cracking catalyst as an integral component of the catalyst. Compositions in accordance with the invention exhibit improved effectiveness for the reduction of NO x emissions released from the regenerator of a fluid catalytic cracking unit operating under FCC process conditions without a substantial change in conversion or yield of cracked products. Processes for the use of the compositions are also disclosed.
Abstract translation:公开了在催化裂化过程中产生的用于还原NO x x N的组合物,优选流化催化裂化过程。 组合物包含优选含有Y型沸石的流化催化裂化催化剂组合物和孔径范围为约2至约7.2埃的NO x 2还原沸石和SiO 2 与低于约500的Al 2 O 3 O 3摩尔比,并且用选自锌,铁和混合物的金属或金属离子稳定化 它们。 优选地,NO x还原沸石颗粒与无机粘合剂结合以形成颗粒组合物。 在替代方案中,将NO x x还原沸石颗粒作为催化剂的组成成分加入到裂化催化剂中。 根据本发明的组合物对于在FCC工艺条件下操作的流化床催化裂化装置的再生器中释放的NO x NO x排放的降低有效,而没有显着改变裂化产物的转化率或产率。 还公开了使用组合物的方法。
Abstract:
Disclosed is a catalyst composition and its use in a process for the conversion of a feedstock containing Cg+ aromatic hydrocarbons to produce light aromatic products, comprising benzene, toluene and xylene. The catalyst composition comprises a first zeolite having a constraint index of 3 to 12, a second zeolite comprising a mordenite zeolite synthesized from TEA or MTEA, at least one first metal of Group 10 of the IUPAC Periodic Table, and at least one second metal of Group 11 to 15 of the IUPAC Periodic Table, wherein said mordenite zeolite has a mesopore surface area of greater than 30 m 2 /g and said mordenite zeolite comprises agglomerates composed of primary crystallites, wherein said primary crystallites have an average primary crystal size as measured by TEM of less than 80 nm and an aspect ratio of less than 2.
Abstract:
Disclosed are a catalyst system and its use in a process for the conversion of a feedstock containing C 8 + aromatic hydrocarbons to produce light aromatic products, comprising benzene, toluene and xylene. The catalyst system comprises (a) a first catalyst bed comprising a first catalyst composition, said first catalyst composition comprising a zeolite having a constraint index of 3 to 12 combined (i) optionally with at least one first metal of Group 10 of the IUPAC Periodic Table, and (ii) optionally with at least one second metal of Group 11 to 15 of the IUPAC Periodic Table; and (b) a second catalyst bed comprising a second catalyst composition, said second catalyst composition comprising (i) a meso-mordenite zeolite, combined (ii) optionally with at least one first metal of Group 10 of the IUPAC Periodic Table, and (iii) optionally with at least one second metal of Group 11 to 15 of the IUPAC Periodic Table, wherein said meso-mordenite zeolite is synthesized from TEA or MTEA and having a mesopore surface area of greater than 30 m 2 /g and said meso-mordenite zeolite comprises agglomerates composed of primary crystallites, wherein said primary crystallites have an average primary crystal size as measured by TEM of less than 80 nm and an aspect ratio of less than 2.
Abstract:
The invention relates to a catalyst for producing an isoparaffins-rich synthetic oil from CO and H2 and to a method for preparing this catalyst. An object of the present invention is to improve mass transfer of reagents inside of catalyst granules and increase content of isoparaffins in the produced oil. The catalyst is granulated porous composite material comprising a three-dimensional heat-conducting structure of metal aluminum and Raney cobalt, and a binding component comprising a H-form zeolite. The particles of Raney cobalt are in direct contact with the particles of the zeolite. The method for preparing the catalyst comprises mixing of binding component powders, peptizing the obtained mixture with a solution of nitric acid to obtain the binding component in the form of a homogeneous gel, mixing of the homogeneous gel with a fine powder of Raney cobalt, powder of metal aluminum and a liquid phase to form a homogeneous paste, extrusion of the prepared paste to form granules and calcination of the obtained granules. The H-form zeolite is used as one of the binding component powders.