Abstract:
A second-stage hydrocracking catalyst is provided, comprising: a) a zeolite beta having an OD acidity of 20 to 400 nmol/g and an average domain size from 800 to 1500 nm2; b) a zeolite USY having an ASDI between 0.05 and 0.12; c) a catalyst support; and d) 0.1 to 10 wt % noble metal; wherein the second-stage hydrocracking catalyst provides a hydrogen consumption less than 350 SCFB across a range of synthetic conversions up to 37 wt % when used to hydrocrack hydrocarbonaceous feeds having an initial boiling point greater than 380° F. (193° C.). A second-stage hydrocracking process using the second-stage hydrocracking process is provided. A method to make the second-stage hydrocracking catalyst is also provided.
Abstract:
Porous, extruded titania-based materials further comprising one or more quaternary ammonium compounds and/or prepared using one or more quaternary ammonium compounds, Fischer-tropsch catalysts comprising them, uses of the foregoing, processes for making and using the same and products obtained from such processes.
Abstract:
Composites of mixed metal oxides for an exhaust gas purifying catalyst comprise the following co-precipitated materials by weight of the composite: zirconia in an amount in the range of 55-99%; titania in an amount in the range of 1-25%; a promoter and/or a stabilizer in an amount in the range of 0-20%. These composites are effective as supports for platinum group metals (PGMs), in particular rhodium.
Abstract:
Embodiments of processes for producing propylene utilize a dual catalyst system comprising a mesoporous silica catalyst impregnated with metal oxide and a mordenite framework inverted (MFI) structured silica catalyst downstream of the mesoporous silica catalyst, where the mesoporous silica catalyst includes a pore size distribution of at least 2.5 nm to 40 nm and a total pore volume of at least 0.600 cm3/g, and the MFI structured silica catalyst has a total acidity of 0.001 mmol/g to 0.1 mmol/g. The propylene is produced from the butene stream via metathesis by contacting the mesoporous silica catalyst and subsequent cracking by contacting the MFI structured silica catalyst.
Abstract:
A catalytic wall-flow monolith 1 for an emission treatment system comprises a porous substrate with first 15 and second 25 faces defining a longitudinal direction therebetween and first and second pluralities of channels each open at a respective face and closed at the other and providing respective inner surfaces. A catalytic material is distributed within the whole or between 85 to 95 % of the length of the porous substrate and a microporous membrane 36 is provided on the channel surfaces. The membrane has pores smaller than soot e.g. 0.1-5 micron and allows a surface soot layer but prevents build-up within the larger substrate pores and thus prevents back-pressure build-up. This allows soot induced backpressure to build within uncoated or thickened coating regions and limits soot collection to manage exothermic effects on regeneration. The layer may extend from the first face for 75 to 95% of a length of the first plurality of channels and may decrease or increase in thickness with distance from the first face.
Abstract:
Catalysts having a blend of platinum on a support with low ammonia storage with an SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.
Abstract:
The present invention relates to an improved process for preparing mono and poly epoxy functionalized fatty acids, their esters and mixtures thereof using solid catalyst i.e. supported group VIb metal oxide, said support comprising silica, alumina and mixtures thereof, optionally with a promoter from group VA wherein the group VIB metal oxide content in the catalyst is 5-20 wt % of support.
Abstract:
The invention is to provide a support which can give a zeolite-based hydrocracking catalyst having a stable catalyst life and showing high cracking activity over a long period, and to provide a hydrocracking catalyst employing the support and a method for hydrocracking of hydrocarbon oil containing aromatics using the catalyst. The invention relates to a support for hydrocracking catalyst of hydrocarbon oil, which comprises a modified zeolite obtained by incorporating titanium into a faujasite-type zeolite, wherein the modified zeolite satisfies the followings (a) to (e), and to a hydrocracking catalyst employing the support and a method for hydrocracking of hydrocarbon oil containing aromatics using the catalyst. (a) The modified zeolite has a titanium content of 1-17% by mass in terms of metal oxide amount, (b) the modified zeolite contains aluminum and silicon in an Al/Si atomic ratio of 0.14-0.35, and (c) the modified zeolite has a lattice constant of 24.36-24.48 Å, (d) a degree of crystallinity of 30-95%, and (e) a specific surface area of 500-850 m 2 /g.
Abstract:
A method of preparing a catalyst composition for producing a stable ratio of NO2 to NO in an exhaust system of a compression ignition engine is described. The method comprises: (i) preparing a first composition comprising a platinum (Pt) compound disposed or supported on a support material; (ii) preparing a second composition by reducing the platinum (Pt) compound to platinum (Pt) with a reducing agent; and (iii) heating the second composition to at least 650° C.