Abstract:
The invention provides novel, low-cost catalysts and methods for their preparation and application in CO 2 adsorption and conversion to long-chain hydrocarbons via photosynthesis with ambient CO 2 and solar energy.
Abstract:
Die Erfindung betrifft eine Vorrichtung und ein Verfahren zur Verminderung der Konzentration von NO x -Stickoxiden in Restgas, welches während des Ab- und/oder Anfahrens von Vorrichtungen zur Herstellung von Salpetersäure anfällt.
Abstract:
Provided are catalyst articles, methods of manufacturing catalyst articles, and methods for controlling emissions in diesel engine exhaust streams with catalyst articles, where the emission treatment system of various embodiments effectively treats diesel engine exhaust with a catalyst article. In one or more embodiments, the catalyst articles have a platinum group metal end coating covering an outlet end surface of the catalytic article. In one or more embodiments, a method is provided where an applicator transfers a platinum group metal coating to an outlet end face of a catalytic article.
Abstract:
Variations of bulk powder catalyst material including Cu-Co, Fe-Co, and Co-Mn spinel systems for ZPGM TWC applications are disclosed. The disclosed bulk powder catalyst samples include stoichiometric and nonstoichiometric Cu-Co, Fe-Co, and Co-Mn spinels on Pr 6 O 11 -ZrO 2 support oxide, prepared using incipient wetness method. Activity measurements under isothermal steady state sweep test condition may he performed rich to lean condition. Catalytic activity of bulk powder samples may be compared to analyze the influence that different bimetallic spinel compositions may have on TVVC performance, including ZPGM materials for a plurality of TWC applications. Stoichiometric Cu-Co, Fe-Co, and Co-Mn spinel systems exhibit higher catalytic activity than non-stoichiometric Cu-Co, Fe-Co, and Co-Mn spinel systems. The influence of stoichiometric Cu-Co, Fe-Co, and Co-Mn spinel systems may lead into cost effective manufacturing solutions for ZPGM TWC systems.
Abstract:
This disclosure provides a halogenated activated carbon composition comprising carbon, a halogenated compound and a salt. In some embodiments, the halogenated compound and the salt comprise a naturally occurring salt mixture, as may be obtained from ocean water, salt lake water, rock salt, salt brine wells, for example. In some embodiments, the naturally occurring salt mixture comprises Dead Sea salt.
Abstract:
Uses are disclosed for a new crystalline molecular sieve designated SSZ-102 synthesized using an N,N'-dimethyl-1,4-diazabicyclo[2.2.2]octane dication as a structure directing agent. SSZ-102 has ESV framework topology.
Abstract:
Beschrieben wird ein Verfahren zur Verminderung der Konzentration von NO x -Stickoxiden in Restgas, welches während des Anfahrens einer Anlage zur Herstellung von Salpetersäure anfällt; wobei das Restgas NO x enthält und wobei das Restgas während des Anfahrens der Anlage anfällt und dabei infolge der Maßnahmen zur Herstellung von Salpetersäure von einer Starttemperatur T 0 unter Durchlaufen einer Grenztemperatur T G schließlich bis auf eine Betriebstemperatur T B erwärmt wird, bei welcher anschließend ein stationärer Betrieb der Anlage erfolgt (T 0 G B ); wobei das Verfahren folgende Schritte umfasst: (a) Überleiten des NO x -enthaltenden Restgases über ein Speichermedium für NO x und Speichern zumindest eines Teils des NO x in dem Speichermedium für NO x , solange die Temperatur des Restgases kleiner als die Grenztemperatur T G ist; (b) ggf. Freisetzen des in Schritt (a) gespeicherten NO x , vorzugsweise wenn die Temperatur des Restgases die Grenztemperatur T G erreicht hat; (c) Zusammenbringen des NO x mit einem Reduktionsmittel für NO x in Gegenwart eines SCR-Katalysators, nachdem die Temperatur des Restgases die Grenztemperatur T G überschritten hat, aber nicht vorher, wodurch zumindest ein Teil des NO x katalytisch reduziert wird, vorzugsweise zu N 2 .
Abstract:
The present invention discloses a photocatalytic process for oxidation of aromatic hydrocarbons using noble metal deposited vanadium-titania composite catalyst with high selectivity and yield of corresponding oxidized product at ambient conditions.
Abstract:
A method is disclosed for the preparation of a metal exchanged microporous materials, e.g. metal exchanged silicoaluminophosphates or metal exchanged zeolites, or mixtures of metal exchanged microporous materials, comprising the steps of providing a dry mixture of a) one or more microporous materials that exhibit ion exchange capacity and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia and one or more oxides of nitrogen to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the microporous material; and obtaining the metal-exchanged microporous material.