Elf Aquitaine

Centre National De La Recherche Scientifique

Université De Nantes

Vincent Goetz

Bernard Spinner

Jack Legrand

Xavier Py

Jacques Prosdocimi

Emmanuel Daguerre

The invention relates to a composite material, a method for controlling the thermal effects generated in a physicochemical process using said material, and applications of the material and the method. The composite material comprises an active solid and a phase change material. The phase change material takes the form of micronodules having an average size of between 1 micron and 5 millimeters and it is selected from materials with a liquid/solid phase change temperature of between &#x2212;150&#xb0; C. and 900&#xb0; C. The active solid is selected from solids that can be used in a method involving reversible physicochemical processes that are exothermic in one direction and endothermic in the opposite direction.

Composite material and use thereof for controlling thermal effects in a physicochemical process

The invention concerns a composite material comprising activated carbon and expanded graphite. The material is a block wherein the activated carbon is homogeneously and uniformly distributed in the form of microporous particles. The texture of said particles is characterised by a microporous volume W ranging between 0.1 cm g and 1.5 cm g and a mean pore dimension L ranging between 2 &angst; and 30 &angst;, the activated carbon particles have substantially the same texture wherever they are located in the composite material, the thermal conductivity levels of the material range between 1 and 100 Wm K . Said material is obtained by heat treatment of a mixture of expanded graphite and an activated carbon precursor in the presence of an activating agent at a temperature and for a time interval sufficient to obtain a wear rate of the activated carbon precursor ranging between 5 and 70% by mass.

Composite material comprising activated carbon and expanded graphite

Thermochemical device for producing cold and/or heat

Method of managing a solid/gas adsorption or thermochemical reaction, the site of which is a device comprising a reactor, which contains a solid capable of reacting with a gas, an evaporator/condenser assembly for the gas and means intended to reheat the solid, the method comprising the steps which consist in:

Method of managing a solid/gas adsorption or thermochemical reaction

A thermochemical system and process for producing heat and/or cold by solid-gas chemical reaction is disclosed. The system and process utilizes a reactant formed of a compressed support and at least two salts which are distributed throughout the compressed support, the salts being active towards a gas. The salts of the reactant are selected for the system and process so that in the system and process one salt will react with the gas in the reactor while the other salts in the reactant remain substantially unreacted to produce heat or cold at a first temperature or power level and, thereafter, one of the other salts of the reactant reacts with the gas to produce heat or cold at a second temperature or power level which is different from the first temperature or power level.

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Perpignan, France

Vincent Goetz