摘要:
Die Erfindung betrifft einen Katalysator zur Entfernung von Stickoxiden aus dem Abgas von Dieselmotoren, sowie ein Verfahren zur Verminderung von Stickoxiden im Abgas von Dieselmotoren. Der Katalysator besteht aus einem Tragkörper der Länge L und einer katalytisch aktiven Beschichtung, die ihrerseits aus einer oder mehreren Materialzonen aufgebaut sein kann. Die Materialzonen enthalten einen Kupfer-haltigen Zeolith bzw. eine zeolithähnliche Verbindung. Dabei kommen Chabazit, SAPO-34, ALPO-34 und Zeolith β zum Einsatz. Desweiteren enthalten die Materialzonen mindestens eine Verbindung ausgewählt aus der Gruppe bestehend aus Bariumoxid, Bariumhydroxid, Bariumcarbonat, Strontiumoxid, Strontiumhydroxid, Strontiumcarbonat, Praseodymoxid, Lanthanoxid, Magnesiumoxid, Magnesium/Aluminium-Mischoxid, Alkalimetalloxid, Alkalimetallhydroxid, Alkalimetallcarbonat und Mischungen davon. Gegebenenfalls kann auch Edelmetall im Katalysator enthalten sein.
摘要:
Provided is an exhaust cleaning catalyst with which precious metal sintering is inhibited and which has greater exhaust cleaning abilities. The present invention provides an exhaust cleaning catalyst comprising a substrate and a catalyst coating layer provided on the substrate. The catalyst coating layer comprises a precious metal that serves as an oxidation and/or reduction catalyst. The precious metal comprises Rh-containing metal particles in which rhodium (Rh) coexists with a base metal selected among platinum group elements excluding rhodium. The Rh-containing metal particles have an average rhodium content of 0.1 % to 5 % by mole with the total amount of the base metal and rhodium being 100 % by mole.
摘要:
The present invention relates to a catalyst for the epoxidation of alkenes, comprising silver, rhenium, cesium, lithium, tungsten and sulfur on a support. The present invention further relates to a process for producing the catalyst and the use of the catalyst for the oxidation of alkylenes to alkylene oxides. In addition, the present invention relates to a process for preparing ethylene oxide from ethylene, which comprises the oxidation of ethylene with oxygen in the presence of said catalyst.
摘要:
The present invention is concerned with a method of coating a carrier which is used in automotive exhaust catalysis. The carrier is subjected to introducing a coating liquid into its channels. In order to check the height of the coated area a thermographic imaging device is used.
摘要:
A smoking article characterized by comprising a carbon monoxide reducing agent comprising particles comprising a calcium aluminate represented by the formula (CaO) m (Al 2 O 3 ) n , where 1/6 ‰¤ m/n ‰¤ 4/1, wherein the particles have a BET specific surface area of 2 m 2 /g or more and less than 20 m 2 /g.
摘要:
Process for preparing a hydrotreating catalyst comprising of from 5 wt % to 50 wt % of molybdenum, of from 0.5 wt % to 20 wt % of cobalt, and of from 0 to 5 wt % of phosphorus, all based on total dry weight of catalyst, which process comprises (a) treating a nickel containing carrier with molybdenum, cobalt and of from 1 to 60% wt of gluconic acid, based on weight of carrier, and optionally phosphorus, (b) optionally drying the treated carrier at a temperature of from 40 to 200° C., and (c) calcining the treated and optionally dried carrier at a temperature of from 200 to 650° C. to obtain the calcined treated carrier.
摘要:
Disclosed in certain implementations is a catalysis composition that includes a metal catalyst and a support material impregnated with the metal catalyst.