A composition and method for producing the same are provided. The composition includes transition metal oxides adhered to a surface of a cerium oxide support, and can additionally include alkali metal or alkaline earth metal promotors. The method includes incipient wetness impregnation of the support with metal salt in solution, and can include impregnation with a metal chelator salt. The composition can be useful as a catalyst for the reduction of noxious gases in combustion exhaust streams. The composition can be of particular use as a component of an automobile catalytic converter, for the specific catalytic reduction of nitrogen oxides to nitrogen gas.

The present invention relates to a process for the one-pot hydrogenation and dehydration or isomerization of an organic compound, and to a catalyst composition for this process comprising transition metal particles having particle size below 50 nm supported on a material comprising at least one fluorinated polymer (P), wherein polymer (P) bears —SO.sub.2X functional groups, X being selected from X′ and OM, X′ being selected from the groups consisting of F, Cl, Br and I; and M being selected from the group consisting of H, and alkaline metal and NH.sub.4.

The present invention relates to a method for producing a carbon nanotube aggregate whose bulk density is easily controllable. Therefore, the present invention provides a carbon nanotube aggregate suitable for use in various fields.

The present invention relates to a method for producing a carbon nanotube aggregate whose bulk density is easily controllable. Therefore, the present invention provides a carbon nanotube aggregate suitable for use in various fields.

A system for reducing ammonia (NH.sub.3) emissions includes (a) a first component comprising a first substrate containing a three-way catalyst, wherein the first component is disposed upstream of a second component comprising a second substrate containing an ammonia oxidation catalyst, wherein said ammonia oxidation catalyst comprises a small pore molecular sieve supporting at least one transition metal; and (b) an oxygen-containing gas input disposed between the components. For example, a CHA Framework Type small pore molecular sieve may be used. A method for reducing NH.sub.3 emission includes introducing an oxygen-containing gas into a gas stream to produce an oxygenated gas stream; and exposing the oxygenated gas stream to an NH.sub.3 oxidation catalyst to selectively oxidize at least a portion of the NH.sub.3 to N.sub.2. The method may further include the step of exposing a rich burn exhaust gas to a three-way catalyst to produce the gas stream comprising NH.sub.3.

A composite, method of making the composite, and method of using the composite are disclosed. The composite comprises a macroporous scaffold comprising pores; and a polymer matrix positioned within the pores; wherein the polymer matrix comprises: a functional polymer particle; and a structural polymer. The method of using can comprise applications such as chromatography, catalysis, and sensing, among others.

Embodiments of the invention include a filtration element. In an embodiment, the invention includes a filtration element for an airplane cabin that includes a first media portion upstream from a second media portion. The first media portion can include activated carbon. The second media portion can include a catalyst material. Other embodiments are also included herein.

Embodiments of the invention include a filtration element. In an embodiment, the invention includes a filtration element for an airplane cabin that includes a first media portion upstream from a second media portion. The first media portion can include activated carbon. The second media portion can include a catalyst material. Other embodiments are also included herein.

An ozone generation method comprising: Supplying a crude feed gas comprising oxygen and methane Performing a catalytic oxidation of methane from the crude feed gas to obtain a treated feed gas Generating ozone from the treated feed gas.

A method of producing a catalytic carbon fiber may include: oxidizing a virgin carbon fiber to produce an oxidized carbon fiber; reacting the oxidized carbon fiber with a polyamine compound to produce an amine modified carbon fiber; and reacting the amine modified carbon fiber with an organometallic macrocycle to produce the catalytic carbon fiber.