Abstract: A recoil device is provided for a gun having a barrel with a breech. The device includes a breech nut, a brake assembly, a pneumatic spring and a counter-recoil buffer. The breech nut has first and second adjacent sides. The brake assembly includes a brake cylinder that mounts to the breech nut on the first side. The pneumatic spring mounts to the breech nut on the second side. The counter-recoil buffer attaches to the pneumatic spring. The brake cylinder and the pneumatic spring internally push fluids for recoil absorption and return in response to firing the gun.

Abstract: The present invention relates to an oxygen carrier solid, to the preparation thereof and to the use thereof in a chemical looping redox process such as chemical looping combustion (CLC). The solid in particulate form includes a total copper content (X) ranging from 5% to 39% expressed as CuO by weight relative to the total weight of the solid in its oxidized form, and a ceramic matrix within which said copper is dispersed, the matrix including a first sub-stoichiometric spinel of formula MgaAlbO4, and/or a second sub-stoichiometric spinel of formula CucMgdAleO4. The carrier solid includes an amount Y of MgO as a weight percentage of the oxygen carrier solid of between 1% and 23%, and Y<?0.6342X+26.223.

Abstract: The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is in the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least one oxide with a melting point higher than 1500° C., such as alumina, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from an aqueous suspension containing precursor oxide grains for the ceramic matrix that have a specific size, by a spray-drying technique.

Abstract: A mesoporous mixed oxide catalyst that comprises silicon and at least one metal M that is selected from the group that consists of the elements of groups 4 and 5 of the periodic table and mixtures thereof, with the mass of metal M being between 0.1 and 20% of the mixed oxide mass.

Abstract: The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is in the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least at least one feldspar or feldspathoid with a melting point higher than 1500° C., such as celsian, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from a precursor of the ceramic matrix, obtained from a macroporous zeolitic material with zeolite crystals of a specific size, and a precursor of the oxidation-reduction active mass.

Abstract: The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is in the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least one oxide with a melting point higher than 1500° C., such as alumina, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from an aqueous suspension containing precursor oxide grains for the ceramic matrix that have a specific size, by a spray-drying technique.

Abstract: The invention relates to an oxygen carrier solid, its preparation and its use in a method of combustion of a hydrocarbon feedstock by active mass chemical-looping oxidation-reduction, i.e. chemical-looping combustion (CLC). The solid, which is hi the form of particles, comprises an oxidation-reduction active mass composed of metal oxide(s) dispersed in a ceramic matrix comprising at least at least one feldspar or feldspathoid with a melting point higher than 1500° C., such as celsian, and has, initially, a specific macroporous texture. The oxygen carrier solid is prepared from a precursor of the ceramic matrix, obtained from a macroporous zeolitic material with zeolite crystals of a specific size, and a precursor of the oxidation-reduction active mass.

Abstract: A mesoporous mixed oxide catalyst that comprises silicon and at least one metal M that is selected from the group that consists of the elements of groups 4 and 5 of the periodic table and mixtures thereof, with the mass of metal M being between 0.1 and 20% of the mixed oxide mass.

Abstract: The present invention relates to a method for impregnating a porous body (14) by a suspension (12) containing at least partly particles, said body comprising a multiplicity of channels (16) delimited by porous walls (22) extending from one (18) of the faces to the other (20) face of said body, part of said channels being obstructed at one face and the other part of the channels being obstructed at the other face. According to the invention, the method consists in: making a suspension whose particle size distribution meets a DV90/Dpores ratio below 0.25 and whose viscosity is such that said suspension is brought inside the walls while depositing part of the particles on the surface of the pores of the walls, communicating one (18, 20) of the faces of body (14) with an enclosure (30) containing the suspension, feeding the suspension into the body, exerting a force on the suspension introduced so that said suspension flows through the walls, passing a fluid through the walls.

Abstract: The invention relates to an integrated method of in-situ oxygen production, chemical looping combustion and gasification of liquid, solid or gaseous fuels allowing combustion of coal, petroleum coke and/or liquid hydrocarbons and notably heavy and/or extra heavy or bituminous residues for production of synthesis gas under pressure and/or energy.

Abstract: The invention relates to the use of a novel type of active mass in looping redox processes. Said mass contains a spinel of formula Cu1?xFe1+xAlO4 with 0?x?0.1. The active mass according to the invention has a high oxygen transfer capacity and improved oxidation and reduction rates.

Abstract: The present invention relates to a process for separating oxygen at high temperature by means of a material comprising at least one compound according to the formula AxBO2-?.yH2O with a lamellar structure composed of sheets generated by the sequence of octahedra connected to one another by the edges, whereby A is at least one of the elements IA or IIA of the periodic classification of elements, B is at least one of the elements IIIB to IIB of the periodic classification of the elements, 0<x?2, 0?y?2, and ?0.4???0.4.

Abstract: The invention relates to the use of materials of mixed iron-manganese oxide type for high-temperature oxygen production, notably by separation of oxygen from air, and said materials can be reversibly reduced at high temperature when subjected to an oxygen partial pressure decrease and oxidized when the oxygen partial pressure is higher. The oxidized form of mixed iron-manganese oxides has a bixbyite and/or hematite structure.

Abstract: The present invention relates to a method for impregnating a porous body (14) by a suspension (12) containing at least partly particles, said body comprising a multiplicity of channels (16) delimited by porous walls (22) extending from one (18) of the faces to the other (20) face of said body, part of said channels being obstructed at one face and the other part of the channels being obstructed at the other face. According to the invention, the method consists in: making a suspension whose particle size distribution meets a DV90/Dpores ratio below 0.25 and whose viscosity is such that said suspension is brought inside the walls while depositing part of the particles on the surface of the pores of the walls, communicating one (18, 20) of the faces of body (14) with an enclosure (30) containing the suspension, feeding the suspension into the body, exerting a force on the suspension introduced so that said suspension flows through the walls, passing a fluid through the walls.

Abstract: The invention relates to a novel type of active mass and to the use thereof in chemical loopping combustion processes. Said active mass contains a spinel which corresponds to the formula AxA?x?ByB?y?O4. The active masses according to the invention have a high oxygen transfer capacity and oxidation and reduction rates which allow their advantageous use in the looping combustion process.

Abstract: The present invention relates to a process for separating oxygen at high temperature by means of a material comprising at least one compound according to the formula AxBO2-?yH2O with a lamellar structure composed of sheets generated by the sequence of octahedra connected to one another by the edges, whereby A is at least one of the elements IA or IIA of the periodic classification of elements, B is at least one of the elements IIIB to IIB of the periodic classification of the elements, 0<x?2, 0?y?2, and ?0.4???0.4.

Abstract: The invention relates to a method for chemical-looping redox combustion on an active mass including a binder, in form of a fluidized-bed catalytic cracking catalyst containing silica and alumina, and a metal oxide active phase. The active mass is obtained by impregnating metal salts on a new or used catalytic cracking catalyst. Advantageously, the invention applies to the sphere of CO2 capture.

Abstract: The invention relates to the use of a novel type of active mass in looping redox processes. Said mass contains a spinel of formula Cu1?xFe1+xAlO4 with 0?x?0.1. The active mass according to the invention has a high oxygen transfer capacity and improved oxidation and reduction rates.

Abstract: The invention relates to an integrated method of in-situ oxygen production, chemical looping combustion and gasification of liquid, solid or gaseous fuels allowing combustion of coal, petroleum coke and/or liquid hydrocarbons and notably heavy and/or extra heavy or bituminous residues for production of synthesis gas under pressure and/or energy.

Abstract: The invention relates to the use of materials of mixed iron-manganese oxide type for high-temperature oxygen production, notably by separation of oxygen from air, and said materials can be reversibly reduced at high temperature when subjected to an oxygen partial pressure decrease and oxidized when the oxygen partial pressure is higher. The oxidized form of mixed iron-manganese oxides has a bixbyite and/or hematite structure.