摘要:
The invention relates to the use of an SiC-based composite refractory material as an inner coating for an aluminium smelting furnace or as a coating for a fused salt electrolytic cell. Said material contains inclusions, comprising at least one a-SiC part, in a ß-SiC matrix.
摘要:
The invention relates to a piece of foam of β-SiC, with a specific surface of at least 5 m2/g and with two zones A and B with differing alveolar porosity distributions, characterised in that said piece is produced from chemical transformation of a porous precursor medium, comprising at least two blocks A' and B' with differing alveolar porosity distributions and that said at least two zones A and B are produced by said chemical transformation of said at least two blocks A' and B'. Said foam, after deposition of an active layer, can be used as a filtering agent in cartridges for purification of exhaust gases. The invention further relates to methods for production of such a foam.
摘要:
The invention relates to a piece of foam of beta -SiC, with a specific surface of at least 5 m /g and with two zones A and B with differing alveolar porosity distributions, characterised in that said piece is produced from chemical transformation of a porous precursor medium, comprising at least two blocks A' and B' with differing alveolar porosity distributions and that said at least two zones A and B are produced by said chemical transformation of said at least two blocks A' and B'. Said foam, after deposition of an active layer, can be used as a filtering agent in cartridges for purification of exhaust gases. The invention further relates to methods for production of such a foam.
摘要:
The invention relates to the use of an SiC-based composite refractory material as an inner coating for an aluminium smelting furnace or as a coating for a fused salt electrolytic cell. Said material contains inclusions, comprising at least one a-SiC part, in a ß-SiC matrix.
摘要:
The invention relates to a method of producing a composite comprising nanofibres or nanotubes on a porous β-SiC substrate, said method comprising the following steps: (a) a catalyst for growing nanotubes or nanofibres is incorporated into said porous β-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.
摘要:
The present invention refers to the use of a metal-free carbon material for converting plastic into C 2 -C 4 olefins and/or other hydrocarbons, under direct induction heating at temperature less than or equal to 800 °C. The present invention also relates to a process for converting plastic into C 2 -C 4 olefin and/or other hydrocarbons, comprising a step of reaction under direct induction heating, with a metal-free carbon material as defined in anyone of the claims, at temperature less than or equal to 800 °C.
摘要:
A method for preparing a catalyst support made from SiC at least partially covered with TiO2, characterised in that said method comprises the following steps: (a) supplying a support made from β-SiC of high porosity, (b) preparing a solution of at least one precursor of TiO2, (c) impregnating said support with said solution, (d) drying said impregnated support, (e) calcining said impregnated support to transform said precursor of TiO2 into TiO2. With an active phase of iron or cobalt, this catalyst is suitable for the Fischer-Tropsch reaction.
摘要:
Catalytic process for the at least partial conversion of a gaseous mixture containing carbon monoxide and hydrogen into a mixture of hydrocarbons, comprising a step of bringing said gaseous mixture into contact with a solid catalyst, said solid catalyst comprising - a porous support comprising a composite material comprising SiC and a titanium carbide (composite referred to as "SiC/TiC") and/or a titanium oxide (composite referred to as "SiC/TiO 2 "), and - an active phase. The support may be prepared in the form of grains, beads, or extrudates, or in the form of cylinders or sheets of cellular foam. Its molar content of titanium with respect to the molar sum Si + Ti is advantageously between 0.5% and 15%.