摘要:
The invention relates to a catalyst consisting of at least: one matrix comprising at least one oxide which is selected from an amorphous oxide, an oxide with low crystallinity and a mixture of both; at least one solid microporous crystalline material which, in the calcined and anhydrous state, has the molar composition X 2 O 3 : nYO 2 :m ZO 2 , in which X is a trivalent element such as, for example, A1, B, Fe, In, Ga, Cr, Y is at least one trivalent element that is different from Ge and Z is Ge, the value (n+m) is at least equal to 5 and can be between 5 and ∞, and the value of n/m is at least equal to 1; and at least one hydrogenating compound, preferably Pt, Pd, Ir, Ru, Rh, and Re or a combination of same. The invention also relates to the use of said catalyst in a process in order to improve the quality of diesel fractions.
摘要:
The invention relates to a catalyst for acid-catalysed hydrocarbon conversions, especially for the alkylation of olefins with isoparaffins, containing a crystalline zeolith having an SiO2/Al2O3-mol ratio of
摘要:
Conventional hydrogen purification apparatuses cannot be used satisfactorily for applications in which much time is required for startup of the apparatus, and the apparatus is repeatedly started and stopped at frequent intervals because of complicated handling. In a hydrogen purification apparatus comprising at least a catalysis body 1 removing carbon monoxide from a reformed gas containing hydrogen, carbon monoxide and steam, the catalyst body 1 is constituted by a carrier comprised of a complex oxide in which at least one of Mo, W and Re is compounded with Zr, or comprised of an oxide of one of Mo, W, Re and Zr, and at least one of Pt, Pd, Rh and Ru carried on the surface of the carrier.
摘要:
Die Erfindung betrifft ein Verfahren zur Entstickung von Abgasen vorwiegend mager betriebener Verbrennungsmotoren umfassend folgende Verfahrensschritte: (a) Plazieren eines stickoxidspeichernden und katalytisch wirkenden Feststoffs frei von Erdalkalimetallen, Alkalimetallen oder Seltenen Erden bestehend aus einer porösen Trägersubstanz sowie auf der porösen Trägersubstanz aufgebrachten Rhodiums, in den Abgasstrang des Verbrennungsmotors, (b) Speicherung der Stickoxide während der mageren Motorbetriebsphase mit einem Luftverhältnis λ>1 und (c) Freisetzung und katalytische Umsetzung der Stickoxide während der fetten Motorbetriebsphase mit einem Luftverhältnis λ
摘要:
The invention is directed to a method for preparing a supported metal catalyst comprising adding a soluble metal salt to a substrate and then reducing the metal salt to the metal by heating in the presence of a gaseous or liquid hydrocarbon which polymerises on heating.
摘要:
This invention provides a catalyst for producing alkyl-benzene. The catalyst of the invention comprises zeolit having molar ratio of SiO2 to Al2O3 from 2 to 20, palladium supported on said zeolit and optional one or more metals selected from the group consisting of Ga, Ni, Co, Ag and Ir. This invention also relates to a process for producing alkyl-benzene by using said catalyst at the temperature from 150 °C to 250 °C and at the pressure from 0.7 to 4.0 MPa, the molar ratio of benzene to olefins from 4 to 20.
摘要:
A catalyst material for purifying exhaust gases from an automobile engine comprises a porous support material having a pore diameter between 0.7 and 20.0 nm and catalytic metals in the form of a mixture of a noble metal and a IIa group metal which is dispersed in and supported by the porous support material.