Abstract:
The invention relates to a process for preparing a hydroconversion catalyst based on a modified zeolite of the FAU framework type with preserved crystallinity and microporosity, comprising the steps of: A- preparation of a modified zeolite of the FAU framework type, whose intracrystalline structure presents at least one network of micropores, at least one network of small mesopores with a mean diameter of 2 to 5 nm and at least one network of large mesopores with a mean diameter of 10 to 50 nm; these various networks being interconnected; B- mixing the zeolite with a binder, shaping the mixture, and then calcining; C- impregnation of the shaped zeolite with at least one compound of a catalytic metal chosen from compounds of a metal from group VIII and/or from group VIB, in acidic medium, provided that at least one compound of a catalytic metal is soluble within said acidic medium and that the acid acts as a complexing or chelating agent for at least one compound of a catalytic metal. The invention also relates to a catalyst obtained via this process and also to the use thereof.
Abstract:
This invention relates to a carbon monoxide combustion catalyst and to a method of making the catalyst used in fluid bed catalytic cracking process. In particular, the preparation of carbon monoxide combustion catalyst containing metals and other composites which promote oxidation of carbon monoxide to carbon dioxide during regeneration of spent FCC catalyst. The method describes the use of spent FCC catalyst by way of modification.
Abstract:
Das Verfahren umfasst das Leiten des N 2 O und NO x enthaltenden Gases über eine Folge zweier Katalysatorbetten enthaltend einen oder mehrere mit Eisen beladene Zeolithe, die Zugabe eines Reduktionsmittels für NO x zwischen den Katalysatorbetten, das Einstellen einer Temperatur von weniger als 500 °C im ersten und zweiten Katalysatorbett, das Einstellen eines Gasdruckes von mindestens 2 bar in den beiden Katalysatorbetten, und die Auswahl einer solchen Raumgeschwindigkeit im ersten und zweiten Katalysatorbett, so dass im ersten Katalysatorbett ein Abbau des N 2 O-Gehalts des Gases um höchstens bis zu 90 %, bezogen auf den N 2 O Gehalt am Eingang des ersten Kataysatorbettes, erfolgt, und dass im zweiten Katalysatorbett ein weiterer Abbau des N 2 O-Gehalts des Gases um mindestens 30 %, bezogen auf den N 2 O Gehalt am Eingang des zweiten Katalysatorbettes, erfolgt. Die erste Reaktionszone dient zum Abbau von N 2 O und in der zweiten Reaktionszone wird das NO x reduziert und zumindest ein Teil des verbliebenen N 2 O wird zersetzt. Die beschriebene Vorrichtung umfasst mindestens ein radial durchströmtes Katalysatorbett.
Abstract:
An adsorbent-catalyst for removal of sulphur compounds from sulfur compound contaminated gas and liquid feed streams, wherein the adsorbent-catalyst is a synthetic X or Y faujasite with a silica to alumina ratio from 1.8:1 to about 5:1 and wherein 40 to 90 % of the cations of the faujasite include transition metals of Groups IB, IIB and VIIB with the balance of the cations being alkali or alkaline earth metals.
Abstract:
Hollow zeolite particles are disclosed. The hollow zeolite particle can have a zeolite type framework peripheral shell that defines and encloses an intra-particle hollow space within the interior of the shell, with the proviso that the peripheral shell does not have a MFI- type framework. Methods of making and using the hollow zeolite particle are also described.
Abstract:
The hydroisomerization of a paraffinic hydrocarbon feedstock obtained from renewable sources is effectively achieved by passing the feedstock in the presence of hydrogen over a hydroisomerization catalyst comprising a crystalline metal silicate molecular sieve, in which a portion of the crystalline framework contains iron.
Abstract:
A cold start catalyst is disclosed. The cold start catalyst comprises a zeolite catalyst and a supported platinum group metal catalyst. The zeolite catalyst comprises a base metal, a noble metal, and a zeolite. The supported platinum group metal catalyst comprises one or more platinum group metals and one or more inorganic oxide carriers. The invention also includes an exhaust system comprising the cold start catalyst. The cold start catalyst and the process result in improved NO x storage and NO x conversion, improved hydrocarbon storage and conversion, and improved CO oxidation through the cold start period.
Abstract:
Groupe motopropulseur de véhicule automobile comprenant un moteur à combustion interne (1; 1 '), une voie d'échappement (3; 3'), un dispositif de post traitement des oxydes d'azote (NOx) (4; 4') des gaz d'échappement destiné à réduire la quantité d'oxydes d'azote rejetée dans l'atmosphère, et un dispositif de post traitement du protoxyde d'azote (N 2 O) (7; 7') des gaz d'échappement destiné à réduire la quantité de protoxyde d'azote rejetée dans l'atmosphère, caractérisé en ce que le dispositif de post traitement du protoxyde d'azote (N 2 O) (7; 7') est disposé en aval du dispositif de post traitement des oxydes d'azote (NOx) (4; 4') sur la voie d'échappement (3; 3').
Abstract:
Hydrocracking catalyst composition comprising an optional metal hydrogenation component supported on a carrier comprising a zeolite of the faujasite structure having a unit cell size in the range of from 24.10 to 24.40 Å, a bulk silica to alumina ratio (SAR) above 12, and a surface area of at least 850 m 2 /g as measured by the BET method and ATSM D4365-95 with nitrogen adsorption at a p/po value of 0.03.
Abstract:
Изобретение относится к области нефтепереработки, а именно к разработке катализатора изодепарафинизации и способа получения низкозастывающих дизельных топлив зимних и арктического сортов с использованием разработанного катализатора. Катализатор изодепарафинизации дизельных дистиллятов содержит в качестве кислотного компонента смесь высококремнеземных цеолитов, гидрирующие переходные металлы - оксиды никеля, молибдена и/или вольфрама, оксид меди, промотор оксид бора и/или фосфора и связующее оксид алюминия при следующем соотношении компонентов при загрузке, % мас.: смесь цеолитов (кислотный компонент) - 45,0-70,0, гидрирующие переходные металлы (в виде оксидов) - 6,5-20,0, медь (в виде оксида) - 0,3-1,5, промотор - 2,0-4,0, оксид алюминия - до 100,0; при этом в процессе изодепарафинизации катализатор используют в сульфидной форме или металлической форме.