Abstract: The present invention relates to a process and a system for the production of hydrogen and carbon by catalytic non-oxidative decomposition of hydrocarbons, such as saturated C1+ hydrocarbons, such as methane, in the presence of a fresh or a spent catalyst composition comprising at least one carbon catalyst. The process of the invention is characterised in that the fresh or spent catalyst composition is heated by means of induction heating to a temperature comprised between 500° C. and 1100° C. The catalyst compositions as applied in accordance with the invention comprise, and preferably consist of, (I) a first component, wherein said first component is selected from one or more non-porous carbon catalysts and/or one or more porous carbon catalysts; and (II) optionally, a second component, wherein said second component consists of a non-carbon material, and preferably is a ceramic or zeolitic support material.

Abstract: The invention relates to a method for producing, applying and fixing a multilayer surface coating (2a, 3a) on at least one surface (1a) to be coated of a host substrate (1) in order to produce a host substrate assembly. Starting with a fixative product (2) and a functional product (3) based on single-walled or multi-walled graphene, the method consists in successively applying: a layer (2a) of fixative product to the or to each surface (1a) to be coated of the host substrate (1); and a layer of the functional product to said fixative layer (2a). The assembly can be finished with a protective layer deposited directly onto the layer (3a) that contains the functional product. The invention also relates to a host substrate assembly which can be obtained by said method, a heating element, an anti-corrosion and/or anti-fouling/dirt-repelling element and a hydrophobic element each comprising such an assembly.

Abstract: The present application is directed to a device which serves to capture microparticles in suspension in the air and which has no active means of ventilation and no means of electrical energy supply. The device comprises a structured support traversed by a large number of openings with a minimum dimension of between 1 millimetre and 15 mm, the structured support having a void fraction of greater than 80%, the structured support being coated with a medium for capturing the microparticles in suspension in a flow of air, the medium being chosen from among: vegetable oils, mineral oils, synthetic or semi-synthetic oils, water-soluble lubricants, silicone oils, animal fat, the structured support coated with the capturing medium being configured to be traversed by a flow of air at a linear speed of between 0.1 and 5 m/s without causing a pressure drop of more than 300 Pa, preferably without causing a pressure drop of more than 250 Pa.

Abstract: The present invention relates to a process for the non-oxidative conversion of saturated C1+ hydrocarbons into unsaturated C2+ hydrocarbons and hydrogen in the presence of an unsupported carbon-based catalyst having a carbon content of at least 90.0 wt % and a metal concentration which is less than 0.3 wt %; with wt % expressed based on the total weight of said carbon-based catalyst. The present invention also provides a process for producing a graphite derivative. Further provided are a graphite derivative, and uses thereof, and systems for carrying out the processes of the invention.

Abstract: A method for converting CO2 into methane wherein hydrogen is contacted with a gas feed including CO2 in at least one methanation reactor comprising a catalyst bed at a temperature in the catalytic bed comprised between 160° C. and 550° C., at a pressure comprised between 0.1 MPa and 1 MPa, with a gas hourly space velocity comprised between 10 m3/kg/h and 50 m3/kg/h and with an H2/CO2 molar ratio comprised between 1 and 8 and wherein the catalyst contains Ni metal deposited on a uranium oxide support of formula UO2+x, with x being comprised between 0.01 and 0.6, and the nickel mass content of between 5% and 40% of nickel metal relative to the total mass of the catalyst.

Abstract: The invention relates to a method for producing, applying and fixing a multilayer surface coating (2a, 3a) on at least one surface (1a) to be coated of a host substrate (1) in order to produce a host substrate assembly. Starting with a fixative product (2) and a functional product (3) based on single-walled or multi-walled graphene, the method consists in successively applying: a layer (2a) of fixative product to the or to each surface (1a) to be coated of the host substrate (1); and a layer of the functional product to said fixative layer (2a). The assembly can be finished with a protective layer deposited directly onto the layer (3a) that contains the functional product. The invention also relates to a host substrate assembly which can be obtained by said method, a heating element, an anti-corrosion and/or anti-fouling/dirt-repelling element and a hydrophobic element each comprising such an assembly.

Abstract: Some embodiments are directed to a new methodology aimed at preparing highly N-doped mesoporous carbon macroscopic composites, and their use as highly efficient heterogeneous metal-free catalysts in a number of industrially relevant catalytic transformations.

Abstract: The present invention relates in particular to a laminar nanomaterial/natural polymolecular system nanocomposite in which the nanomaterial is an exfoliated and/or dispersed laminar material, and the polymolecular system has a hydrophilic-lipophilic balance (HLB)?8. The present invention also relates to a laminar nanomaterial/natural polymolecular system nanocomposite colloid in a polar solvent, in which the concentration of exfoliated/dispersed nanomaterial in the polar solvent is ?1 g/L, and in which the nanomaterial is an exfoliated and/or dispersed laminar material, and the natural polymolecular system has a hydrophilic-lipophilic balance ?8. The present invention also relates to a process for preparing a nanocomposite colloid according to the invention, and also to a process for exfoliating and/or dispersing a laminar material.

Abstract: Some embodiments are directed to a new methodology aimed at preparing highly N-doped mesoporous carbon macroscopic composites, and their use as highly efficient heterogeneous metal-free catalysts in a number of industrially relevant catalytic transformations.

Abstract: Catalytic process for the partial conversion of a gaseous mixture containing carbon monoxide and hydrogen into a mixture of hydrocarbons, including bringing the said gaseous mixture into contact with a solid catalyst, the solid catalyst having a porous support with a composite material including SiC and a titanium carbide and/or a titanium oxide, and an active phase. The support is prepared in the form of grains, beads, or extrudates, or in the form of cylinders or sheets of cellular foam.

Abstract: Catalysts supports and catalysts capable of being used in heterogeneous catalysis. The catalyst support belongs to the porous supports based on silicon carbide (SiC), in particular, based on ?-SiC, modified by a surface deposit of TiO2.

Abstract: The preparation of graphene, mono-, bi- and multi-layers from graphite-based precursor materials, for example, pencil lead or graphite, by a method of mechanical thinning on the surface of a planar substrate with controlled roughness, followed by sonication in order to collect the graphene deposited on the substrate in a liquid medium. The bearing force during thinning by mechanical friction enables the number of graphene sheets deposited on the surface of the substrate to be controlled.

Abstract: Catalysts supports and catalysts capable of being used in heterogeneous catalysis. The catalyst support belongs to the porous supports based on silicon carbide (SiC), in particular, based on ?-SiC, modified by a surface deposit of TiO2.

Abstract: A process for the preparation of dimethyl ether by catalytic dehydration of methanol, in which there is used a catalyst based on a zeolite immobilized on a silicon carbide support, for example a zeolite of type ZSM-5 supported on silicon carbide extrudates or on a silicon carbide cellular foam.

Abstract: Catalytic process for the partial conversion of a gaseous mixture containing carbon monoxide and hydrogen into a mixture of hydrocarbons, including bringing the said gaseous mixture into contact with a solid catalyst, the solid catalyst having a porous support with a composite material including SiC and a titanium carbide and/or a titanium oxide, and an active phase. The support is prepared in the form of grains, beads, or extrudates, or in the form of cylinders or sheets of cellular foam.

Abstract: The invention relates to a photocatalyst comprising a ?-SiC cellular foam and a photocatalytically active phase, deposited directly on said cellular foam or on an intermediate phase deposited on said cellular foam. The average size of the cells is between 2500 ?m and 5000 ?m. The foam can comprise nanotubes or nanofibers (particularly of carbon, SiC, and TiO2) that consist of, or carry as an intermediate phase, a photocatalytically active phase.

Abstract: The preparation of graphene, mono-, bi- and multi-layers from graphite-based precursor materials, for example, pencil lead or graphite, by a method of mechanical thinning on the surface of a planar substrate with controlled roughness, followed by sonication in order to collect the graphene deposited on the substrate in a liquid medium. The bearing force during thinning by mechanical friction enables the number of graphene sheets deposited on the surface of the substrate to be controlled.

Abstract: The invention relates to a photocatalyst comprising a ?-SiC cellular foam and a photocatalytically active phase, deposited directly on said cellular foam or on an intermediate phase deposited on said cellular foam. The average size of the cells is between 2500 ?m and 5000 ?m. The foam can comprise nanotubes or nanofibers (particularly of carbon, SiC, and TiO2) that consist of, or carry as an intermediate phase, a photocatalytically active phase.

Abstract: A method of preparing a solid material based on tangled nanotubes and/or nanofibers, includes a step of growing carbon nanofibers and/or nanotubes with restraint in a contained reactor; and the materials thus obtained. The different uses of the materials are also disclosed.

Abstract: The invention relates to a method of producing a composite comprising nanofibres or nanotubes on a porous ?-SiC substrate, said method comprising the following steps: (a) a catalyst for growing nanotubes or nanofibres is incorporated into said porous ?-SiC substrate or into an SiC precursor; (b) carbon nanotubes or nanofibres are grown from a mixture comprising hydrogen and at least one hydrocarbon; and (c) optionally, said carbon nanotubes or nanofibres are converted to SiC nanofibres. This composite may be used as a catalyst or catalyst support.