Abstract:
The invention pertains to a production process (2) of a solid catalyst material (7) using a solid material (8), having at least one pore or at least one cavity, the pore or the cavity having one diameter of less than 1 µm, which is exposed to a metal complex (15, 15') entering the pore or cavity, wherein the solid material (8, 8') is impregnated with metal by steps of adsorption of the metal complex (15, 15') in the pore or in the cavity of the solid material (8, 8'), and decomposition of the metal complex (15, 15') by means of oxidation, wherein metal from the metal complex (15, 15') is attached to a surface of the solid material (8, 8'). The metal is bond to the surface of the solid material (8, 8') at least in part along the pore or the cavity. At least some of the structures enclosing the pore or the cavity bind metal dispersed as monomeric species or dimeric species of metal or metal bound to the oxidizing gas (17, 17'), whereby all monomeric species exceed all oligomeric species by number. Further, the invention relates to an apparatus for production of a solid catalyst material (7).
Abstract:
A layered diesel oxidation catalyst (DOC) comprises: a) a carrier substrate; b) a diesel oxidation catalytic material comprising bl)a first layer located on the carrier substrate, the first layer comprising palladium impregnated on a support material comprising ceria in an amount of at least 45 weight% based on the total weight of the support material, and optionally comprising platinum; b2) a second layer located on the first layer, the second layer comprising palladium and platinum each impregnated on a support material comprising a metal oxide; wherein the platinum to palladium weight ratio of the first layer is lower than the platinum to palladium weight ratio of the second layer.
Abstract:
The present invention relates to a new process which comprises the steps of hydrotreating, paraffin disproportionation and hydroisomerization to convert biological hydrocarbonaceous oxygenated oils comprising triglycerides into biologically-derived paraffinic jet/diesel fuels, solvents and base oils. A combination of conventional hydrogenation/dehydrogenation catalysts, such as Pt/Al 2 O 3 , and conventional olefin metathesis catalysts, such as WO 3 /SiO 2 , or inexpensive variations thereof, is generally employed in the paraffin disproportionation step.
Abstract:
The present invention relates to a zoned diesel oxidation catalyst, wherein the first catalytically active zone and the second catalytically active zone have identical thermal masses, the first catalytically active zone and the second catalytically active zone each contain platinum and palladium as catalytically active components, the weight ratio of platinum to palladium in the first catalytically active zone and the second catalytically active zone is the same in each case or is greater in the first catalytically active zone than in the second catalytically active zone, and the total concentration of platinum and palladium in the first catalytically active zone is greater than in the second catalytically active zone.
Abstract:
A photocatalyst is provided that comprises activated carbon produced from date pits, impregnated with TiO 2 . The activated carbon can have a porous surface that can attract and trap pollutants flowing in air or water. The photocatalyst can be made by a method that includes preparing activated carbon by calcining date pits to form a precursor material, and then impregnating the precursor material with titanium dioxide.
Abstract:
An exhaust gas purification catalyst includes: a support containing alumina as a major component; and an active species fine particle containing silver sulfate as a major component and having an average crystallite size of 3 nm to less than 100 nm, in which the active species fine particle is supported on a surface of the support.