摘要:
Disclosed are a method for preparing a modified molecular sieve catalyst and a method for producing benzene, toluene and p-xylene by coupling conversion of naphtha and CO2. The method for preparing a modified molecular sieve catalyst includes subjecting a molecular sieve to metal modification by using a high temperature hydrothermal method, which includes the following steps: (1) preparing a soluble metal salt aqueous solution; (2) placing a zeolite molecular sieve to be metal-modified in the soluble metal salt aqueous solution, and impregnating the same at a temperature of 60-100°C; and (3) draining the molecular sieve obtained in step (2), followed by drying and calcination. The method for producing benzene, toluene and p-xylene by coupling conversion of naphtha and CO2 includes: (a) preparing a modified molecular sieve catalyst; and (b) enabling a raw material containing naphtha and CO2 to contact with the modified molecular sieve catalyst in a reactor for a reaction to produce benzene, toluene and p-xylene; and the method overcomes the defects of limited hydrogen resources and high costs of existing technologies.
摘要:
Methods and catalysts are provided for performing dewaxing of diesel boiling range fractions, such as trim dewaxing, that allow for production of diesel boiling range fuels with improved cold flow properties at desirable yields. In some aspects, the methods can include use of dewaxing catalysts based on an MEL framework structure (ZSM-11) to provide improved dewaxing activity. In some aspects improved dewaxing is achieved operating at lower pressures and with higher amounts of organic nitrogen slip from hydrotreatment.
摘要:
This invention relates to a process and an apparatus for production of catalytically active metal composites comprising a solid support material. The metal composites can be designed with a combination of metallic or a combination of metallic and non-metallic materials. The process provides confinement of metal by a shell structure, which is also named eggshell-structure. The activation of at least one chemical reaction like a synthesis reaction, a molecular decomposition or an oxidation reaction can be facilitated by such a material.
摘要:
The present disclosure relates to an FCC catalyst additive composition, including at least one zeolite in an amount ranging from 30 to 50% of the total weight of the composition; at least one Group V element in an amount ranging from 0.1 to 5 % of the total weight of the zeolite; at least one promoter in an amount ranging from 1 to 3 % of the total weight of the zeolite; and optionally, at least one excipient in an amount ranging from 50 to 70% of the total weight of the composition. The present disclosure also provides a process for the preparation of the FCC catalyst additive composition.
摘要:
A catalyst composition comprising a mixture of (a) a zeolite compound in an amount of from 10% to 60% by weight, wherein the zeolite compound comprises cations selected from Fe2+, Fe3+, Cu+, Cu2+ or mixtures thereof, and (b) a ceria/zirconia/alumina composite oxide, wherein the alumina content in said composite oxide is in the range of 20 to 80% by weight, in particular of 40 to 60% by weight, a catalyst comprising such catalyst composition and its use for exhaust gas after-treatment of diesel and lean burn engines.
摘要:
Form liquid product stream that has a C13 to C20 hydrocarbon content of less than 5.0 wt % based upon a total weight of the liquid product stream via a process that includes contacting synthesis gas with a sulfurized Zeolite Socony Mobil-5 catalyst. The sulfurized Zeolite Socony Mobil-5 catalyst can include ZSM-5, cobalt, an alkali metal, sulfur, and a reduction promoter.
摘要:
In an embodiment, a process of making a catalyst can comprise contacting a zeolite with an aluminum solution comprising an aluminum compound at a pH of 2 to 6; calcining the zeolite to form the catalyst; wherein the catalyst comprises 0.1 to 5 wt % aluminum based on the total weight of the catalyst excluding any binder or extrusion aide. In an embodiment, a process of aromatizing methane can comprise aromatizing a feed comprising methane in the presence of the catalyst under aromatization conditions.