Abstract: The invention relates to a method for purifying a carrier gas which comprises oxygenated impurities in a first oxidation degree, the purification method comprising the circulation, advantageously uninterrupted, of the carrier gas through and along a direction XX? of a filter, the filter being made of an oxygen scavenger material which has a redox potential E°, and of which a first portion is in a reduced redox state and within which the oxygenated impurities are scavenged and/or pass from the first oxidation degree to a second oxidation degree, the method further comprising the application to the filter of a greater electric potential ?V, as an absolute value, than the redox potential E° during a main purification cycle CP.

Abstract: A device for converting biomass into a redox mediator in reduced form, including an assembly of microbial fuel cells including a first compartment including an anode and fermentative microorganisms and electroactive microorganisms, and a second compartment including a cathode and a solution including the mediator, and an external resistor connecting the cathode and the anode. The value of the external resistance of at least one microbial fuel cell is distinct from that of at least one other microbial fuel cell. The device thus makes it possible to induce segregation of fermentative microorganisms and electroactive microorganisms along the assembly.

Abstract: The disclosure relates to the field of metal ion capture, more particularly of selective capture of nickel Ni(II) ions, by a polymeric compound based on a polymer selected from styrenic polymers and chloropolymers. In the polymeric compound, at least one portion of the monomer units of the polymer is functionalised by the ligand, the ligand including at least one chemical group selected from the glyoxime groups. The glyoxime groups have a strong affinity for the Ni(II) ions, as well as an excellent selectivity vis-à-vis metal ions of chemical properties similar to Ni(II) ions. This ligand thus allows a selective complexation of the Ni(II) ions by the polymeric compound, including in solutions of low concentrations of Ni(II) ions. The polymeric compound according to at least one embodiment of the disclosure is particularly intended for capturing the Ni(II) ions during the electrogalvanising methods as well as for recycling material comprising nickel.

Abstract: The invention relates to a method for purifying a carrier gas which comprises oxygenated impurities in a first oxidation degree, the purification method comprising the circulation, advantageously uninterrupted, of the carrier gas through and along a direction XX? of a filter, the filter being made of an oxygen scavenger material which has a redox potential E°, and of which a first portion is in a reduced redox state and within which the oxygenated impurities are scavenged and/or pass from the first oxidation degree to a second oxidation degree, the method further comprising the application to the filter of a greater electric potential ?V, as an absolute value, than the redox potential E° during a main purification cycle CP.

Abstract: A method is described to regenerate an oxygen trap, comprising at least the following steps: circulating a current in the trap material (2) to reduce this material; measuring the value Im of the current and estimating its derivative dIm/dt in relation to time; estimating the length (?) of material reduced by the current as a function of the value of the current and its derivative; stopping circulation of the current when the length of reduced material is at least equal to a threshold value (?s).

Abstract: A method is described to regenerate an oxygen trap, comprising at least the following steps: circulating a current in the trap material (2) to reduce this material; measuring the value Im of the current and estimating its derivative dlm/dt in relation to time; estimating the length (?) of material reduced by the current as a function of the value of the current and its derivative; stopping circulation of the current when the length of reduced material is at least equal to a threshold value (?s).