Abstract:
A system for breaking down a PFA (perfluoroalkyl or polyfluoroalkyl) compound includes a reactor vessel, a heater, and a catalyst. The reactor vessel is operable to hold influent that includes a PFA compound, an alkali, and water, while alkaline hydrolysis separates a fluorine atom from the PFA compound in the influent. The heater is operable to heat the influent to a temperature within the range of 100° Celsius to 700°Celsius. And the catalyst is operable to increase the rate at which alkaline hydrolysis separates a fluorine atom from a PFA compound. The catalyst includes a body that includes a transition metal, which is a d-block metal or a metal from any of the periodic table's groups 4 - 11. The body also has a shape configured to multiply a surface-area-to-volume ratio by at least 1.5 when the body is disposed in an influent experiencing alkaline hydrolysis.
Abstract:
The present invention relates to an inorganic pigment with the function of a catalyst that can be activated by light from the entire visible spectrum but also in the absence of light, to a process for obtaining it, to various formulations containing this inorganic pigment and its use. The present invention also provides a method of destroying pathogens represented by irradiating with electromagnetic radiation from the entire visible spectrum (400nm-700nm) the surfaces on which they have been applied - formulations containing the inorganic pigment. Additionally, the invention provides the use of the pigment disclosed herein for its catalytic, bactericidal, virucidal and de-pollution activity in the absence of light.
Abstract:
There is described a packing member for use in a packed bed. The packing member comprises ceramic material and further comprises surface structures on the outer surface of the packing member. The packing member does not comprise a fluid communication intra-particle channel extending through the packing member from a first aperture on a first side of the packing member to a second aperture on a substantially opposing second side of the packing member. Also described is a supported catalyst, apparatus and a method of production.
Abstract:
A catalyst bed contains one or more segments of monolithic catalyst, wherein the monolithic catalyst includes a monolithic honeycomb structure and a layer of catalyst coating the honeycomb structure; the honeycomb structure contains a plurality of channels aligned side by side; and each channel includes an inlet positioned at a first terminus of the channel, an outlet positioned at a second terminus of the channel, and openings positioned along the channel in the direction of fluid flow through the channel for transverse fluid flow in and/or out of the channel.
Abstract:
A catalyst for oxidising ammonia comprises a selective catalytic reduction (SCR) catalyst and a composite heterogeneous extruded honeycomb having longitudinally extending parallel channels, which channels being defined in part by channel walls having a total longitudinal length, wherein the channel walls comprise a pore structure including a periodic arrangement of porous cells embedded in an inorganic matrix component, at least some of which porous cells are defined at least in part by an active interface layer of a catalytically active material comprising a precious metal supported on particles of a support material.
Abstract:
The present disclosure refers to a plurality of process employed for optimization of Zero-PGM washcoat and overcoat loadings on metallic substrates. According to an embodiment a substantial increase in conversion of HC and CO may be achieved by optimizing the total washcoat and overcoat loadings of the catalyst. According to another embodiment, the present disclosure may provide solutions to determine the optimum total washcoat and overcoat loadings for minimizing washcoat adhesion loss. As a result, may increase the conversion of HC and CO from discharge of exhaust gases from internal combustion engines, optimizing performance of Zero-PGM catalyst systems.
Abstract:
One exemplary embodiment can be an extruded C8 alkylaromatic isomerization catalyst. The extruded catalyst can include: 2% to 20%, by weight, of an MTW zeolite; 80% to 98%, by weight, of a binder including an alumina; 0.01% to 2%, by weight, of a noble group metal calculated on an elemental basis; and 100 ppm to less than 1000 ppm, by weight, of at least one alkali metal calculated on an elemental basis. Generally, the weight percents of the MTW zeolite, the binder, the noble group metal, and the at least one alkali metal are based on a weight of the extruded catalyst.
Abstract:
A carrier for a catalyst useful for the epoxidation of an olefin which comprises an inert, refractory solid carrier is provided. The carrier has no or little absolute volume from small pores, of less than 1 micrometer, and large pores, of above 5 micrometer. By "no or little absolute volume from small pores of less than 1 micron" it is meant that the pore volume of such pores is less than 0.20 ml/g. By "no or little absolute volume from large pores of above 5 micron" it is meant that the pore volume of such pores is less than 0.20 ml/g. The invention further provides a catalyst useful for the epoxidation of an olefin supported on such a carrier and a process for the oxidation of an olefin, especially ethylene, to an olefin oxide, especially ethylene oxide.
Abstract:
A catalyst composition comprising an inorganic support material, a palladium component, a silver component, and a promotor component having the formula XYFn, wherein X is an alkaline metal, Y is an element selected from the group consisting an antimony, phosphorus, boron. Aluminum, gallium, indium, thallium, and arsenic, and n is an integer which makes YFn a monovalent anion. The above-described catalyst is employed as a catalyst in the selective hydrogenation of acetylene. The above-described catalyst is made by incorporating a palladium component, a silver component, and a promoter component into an inorganic support material.
Abstract:
Catalyst compositions useful for destruction of volatile organic carbons (VOCs) in an oxygen-containing gas stream at low temperatures and for selective oxidation of carbon monoxide from a hydrogen-containing gas comprising: one or more first metals selected from the group consisting of: Ce and Zr; and at least one of: a) one or more second metals selected from the group consisting of: Gd, La, Sr and Sc; b) one or more third metals selected from the group consisting of: Ti, V, Mn, Fe, Co, Cr, Ni, Au, Ag and Cu; and c) one or more fourth metals selected from the group consisting of Pt, Pd, Rh, Ru, Re, Os and Ir are provided. Catalyst compositions provided may be single-phase, mixed-metal oxides, or multi-phase.