Centre National De La Recherche Scientifique

Manufacture De Vetements Paul Boye

Xavier Py

Bernard Spinner

Vincent Goetz

Emmanuel Daguerre

André Guillot

Francis Kindbeiter

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

A method for obtaining activated carbons from a partly mesophased and partly mesogenic pitch containing less than about 40% of the a resins, more than about 40% of type &#x3b2; resins and between about 5 and 30% of type &#x3b3; resins by activating the pitch preceded by its optional carbonization.

Activated carbons and method for obtaining same from a partly mesophase and partly mesogenic pitch

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

The invention concerns a method for controlling a thermochemical reaction or a solid-gas adsorption being carried out in a reactor (,) containing an active agent capable of reversibly reacting with a gas, the reactor (,) being connected to an evaporator/condenser assembly (,) for the gas by a connection (,) without control valve, the reactor (,) and the evaporator/condenser assembly (,) each provided with means for selectively exchanging calories with their surroundings. The control method consists in: thermally insulating the reactor (,) and the evaporator/condenser assembly (,) from the surroundings; thermally communicating the reactor (,) with its surroundings so that the active agent reacts with the gas, thereby providing cold to the evaporator (,); thermally communicating the evaporator (,) with its surroundings so as to cool it selectively; and selectively insulating the reactor (,) or the evaporator/condenser assembly (,) from their surroundings so as to stop the reaction at one point of the reversible cycle.

Growing community of inventors

Canohes, France

Xavier Py