Abstract: Catalytic dihydrogen recombiner (1), comprising: —at least a first catalytic block (30a) of a honeycomb substrate made of a material with low thermal conductivity, having a first catalytic coating, —at least a second catalytic block (30b) of a honeycomb substrate made of a material with low thermal conductivity, having a second catalytic coating, said second substrate having the same cross-section as the first, —a structure (3, 21) for supporting the blocks one on top of the other and/or one next to the other.

Abstract: A method for filtration of harmful gas effluents from an industrial installation including the steps of providing a gas effluent from an industrial installation, the gas effluent including a mixture of gases; filtering the harmful, elements from the gas effluent by membrane separation through a plurality of membranes, the membrane separation being achieved by sifting, sorption and/or diffusion, each membrane being adapted for filtering a specific harmful element; sorting the filtered harmful elements and storing them in separate storage reservoirs, and discharging the processed gas effluent to the atmosphere.

Abstract: A membrane for a method for filtration of gas effluents from an industrial installation including a wall having an internal surface and an external surface, the wall having pores of variable dimensions in the radial direction and in the longitudinal direction of the wall.

Abstract: A method for filtration of harmful gas effluents from a nuclear power plant including the steps of providing a gas effluent from a nuclear power plant, the effluent including a mixture of gases; filtering the harmful, notably radioactive elements from the gas effluent by membrane separation through at least one membrane, the membrane separation being achieved by sifting, sorption and/or diffusion; storing the filtered harmful elements in storage reservoirs, and discharging the processed gas effluent to the atmosphere.