Methods are provided for emissions control of a vehicle. In one example, a catalyst may include a cerium-based support material and a transition metal catalyst loaded on the support material, the transition metal catalyst including nickel and copper, wherein nickel in the transition metal catalyst is included in a monatomic layer loaded on the support material. In some examples, limiting nickel to the monatomic layer may mitigate extensive transition metal catalyst degradation ascribed to sintering of thicker nickel washcoat layers. Further, by utilizing the cerium-based support material, side reactions involving nickel in the transition metal catalyst with other support materials may be prevented.

Provided are titanium oxide particles having a higher photocatalytic activity as compared to the conventional ones; a dispersion liquid thereof; a photocatalyst thin film formed using such dispersion liquid; a member having such photocatalyst thin film on its surface; and a method for producing the titanium oxide particle dispersion liquid. The titanium oxide particles are those with a titanium component and a silicon component being adhered to the surfaces thereof, wherein a molar ratio of the titanium component to titanium oxide (TiO.sub.2/Ti) is 10 to 10,000, and a molar ratio of the silicon component to titanium oxide (TiO.sub.2/Si) is 1 to 10,000; and the titanium oxide particle dispersion liquid is one with such titanium oxide particles being dispersed in an aqueous dispersion medium.

[Task] To avoid use of direct fire and suppress CO.sub.2 emission when heating a heat medium used to input heat to dehydrogenation reaction of hydrogenated aromatics.

[Solution] A hydrogen station 1 includes: a dehydrogenation reactor 23 that produces hydrogen by dehydrogenation reaction of a hydrogenated aromatic in presence of a dehydrogenation catalyst; a heat supply device 26 that supplies heat to the dehydrogenation reactor via a heat medium heated by using fuel; and a PSA device 33 that purifies a reaction product gas in the dehydrogenation reactor by using an adsorbent according to a pressure swing adsorption method, wherein the PSA device is supplied with a purge gas containing hydrogen used in regeneration of the adsorbent, the heat supply device includes a storage tank 27 storing the heat medium and a catalytic combustion tube 28 disposed in the storage tank to catalytically combust the fuel in presence of a combustion catalyst, and the catalytic combustion tube is supplied with the purge gas discharged from the PSA device as the fuel together with air.

The present invention relates to a selective catalytic reduction (SCR) catalyst comprising a support, vanadium and antimony, a catalytic article comprising the SCR catalyst, and an exhaust treatment system for an internal combustion engine comprising the SCR catalyst. In one embodiment, the invention provides an SCR catalyst for reduction of 5 nitrogen oxides, comprising: a support, and an active material on the support; wherein the support, calculated as its oxide, is present in the SCR catalyst in an amount of 40 to 99% by weight, relative to the total weight of the SCR catalyst; the active material comprises vanadium and antimony; the vanadium, calculated as V.sub.2O.sub.5, is present in the SCR catalyst in an amount of 1 to 15% by weight, relative to the total weight of the SCR catalyst; the 10 antimony, calculated as Sb.sub.2O.sub.3, is present in the SCR catalyst in an amount of 0.5 to 20% by weight, relative to the total weight of the SCR catalyst; wherein the SCR catalyst, after hydrothermally aged at 550° C. for 100 hours with 10% water, has a 200-300° C. denitrification efficiency of at least 60%, with 60,000h.sup.−1 space velocity and an ammonia to NOx molar ratio of 1:11

An adsorbent is in a liquid-phase hydrogenation catalyst composition. A catalyst bed containing the liquid-phase hydrogenation catalyst composition may be applicable in adsorption technology or oil liquid-phase hydrogenation technology. The adsorbent contains a porous material and a hydrogenation active metal supported on the porous material. The adsorbent has an average pore diameter of 2-15 nm, a specific surface area of 200-500 m.sup.2/g, and the hydrogenation active metal is present in an amount, calculated as metal oxide, of 2.5 wt % or less, based on the total weight of the adsorbent. The adsorbent has a high hydrogen sulfide adsorption efficiency for a long period of time, and can effectively prolong the protection period for the hydrodesulfurization catalyst.

The present invention relates to a diesel oxidation catalyst comprising a carrier body having a length L extending between a first end face and a second end face, and differently composed material zones A and B arranged on the carrier body, wherein material zone A comprises platinum, palladium, rhodium or a mixture of any two or more thereof applied to a cerium-zirconium mixed oxide, and material zone B comprises platinum, palladium or platinum and palladium applied to a carrier oxide B.

To provide a platinum-loaded alumina catalyst with an improved catalyst life.

A platinum-loaded alumina catalyst includes an alumina carrier, and platinum loaded on the alumina carrier, wherein the alumina carrier includes a γ-alumina carrier having a surface area of 200 m.sup.2/g or more, a pore volume of 0.50 m.sup.2/g or more, an average pore diameter in a range of 60 to 150 Å, with pores having a pore diameter in a range of ±30 Å from the average pore diameter occupying 60% or more of a total pore volume, platinum particles are loaded on γ-alumina carrier in a range of 0.1 to 1.5% by weight calculated as elemental platinum (Pt), and 70% or more of the platinum particles have a size of 8 to 15 Å by direct observation using a transmission electron microscope.

The presently claimed invention provides an emission control catalyst article comprising a substrate having an inlet axial end and an outlet axial end, a bottom washcoat layer coated on the 60 to 100% length of the substrate from the inlet axial end to the outlet axial end, and a top washcoat layer coated on the 60 to 100% length of the substrate from the inlet or the outlet or both end of the substrate such that the top coat covers at least 60% of the length of the bottom washcoat layer, wherein at least part of the top washcoat layer and/or the bottom washcoat layer comprises a first portion and a second portion, wherein the first portion begins at the inlet axial end or the outlet axial end of the substrate and exhibits a platinum group metal concentration of 2 to 100 times higher than the concentration of a platinum group metal in the second portion, wherein the first portion comprises 5-50% of the substrate volume and exhibits a three-dimensional axial and/or radial zone arrangement starting from the inlet axial end of the substrate or the outlet axial end or both, wherein the platinum group metal loading in the first portion is 10 to 1000 g/ft, as determined axially from a first end of the first portion to a second end of the first portion. The platinum group metal of the first portion is deposited by spraying a platin group metal precursor solution using an apparatus comprising a spray nozzle connected to the dosing unit via a second supply tube, a control arm device connected to the spray nozzle, wherein said control arm device is adapted to allow the 3-D positioning of the nozzle relative to a substrate face and adapt the radial and/or axial deposition of the platinum group metal within the individual channels.

An iron-free supported catalyst for the selective conversion of hydrocarbons to carbon nanotubes may include cobalt and vanadium as active catalytic metals in any oxidation state on a catalyst support comprising aluminum oxide hydroxide. The mass ratio of cobalt to vanadium is between 2 and 15; the mass ratio of cobalt to aluminum is between 5.8 10.sup.−2 and 5.8 10.sup.−1; and the mass ratio vanadium to aluminum is between 5.8 10.sup.−3 and 8.7 10.sup.−2. The present disclosure is further related to a method for the production of this iron-free supported catalyst and to a method for the production of carbon nanotubes using the iron-free supported catalyst.

A hydrocarbon synthesis catalyst is for reacting a raw material gas including hydrogen and carbon dioxide to convert to hydrocarbons, wherein when elemental analysis of a surface of the hydrocarbon synthesis catalyst to be brought into contact with the raw material gas is performed by energy dispersive X-ray spectroscopy (SEM-EDX), 15 to 65% by mass of Fe, 10 to 40% by mass of O, 0.04 to 30% by mass of Na, 0 to 15% by mass of Ni, and 5 to 30% by mass of Cr are detected.