摘要:
The present invention relates to a process for the direct dehydrogenation of a hydrocarbon, comprising the step of contacting said hydrocarbon with a catalyst at a temperature comprised between 400°C and 700 °C, wherein said catalyst consists of a carbon active phase that is coated on γ-AI2O3 support, said γ-AI2O3 support being a host matrix for said carbon active phase. It also relates to a process for the preparation of a composite comprising a carbon active phase coating on a γ-AI2O3 support, said γ-Al2O3 support being a host matrix for said carbon active phase, said process comprising the step of treating a support consisting of γ-AI2O3 at a temperature comprised of from 550°C to 650°, under an ethane stream for a period of at least 1.5 hours or under a stream of ethylbenzene, ethane or ethylbenzene diluted in an inert gas stream. Other subject-matters of the invention are a composite comprising a support consisting of γ-AI2O3 and a carbon active phase, wherein said γ-Al2O3 support is a host matrix for said carbon active phase, obtainable by a process as defined above, and the use of the composite, for oxygen- and/or steam-free direct dehydrogenation of ethylbenzene to styrene.
摘要:
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.
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.