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Plasma microreactor apparatus, sterilisation unit and analyser

  • US 8,734,727 B2
  • Filed: 01/06/2010
  • Issued: 05/27/2014
  • Est. Priority Date: 01/06/2009
  • Status: Active Grant
First Claim
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1. Gas apparatus for the production of product gas, the apparatus comprising:

  • a gaseous supply of a plasmolysable reactant gas;

    electrodes, with a space between them of less than 1 mm;

    a first conduit to lead the reactant gas from the gaseous supply through the space between the electrodes;

    a power source to apply a voltage across the electrodes to dissociate the reactant gas to an intermediate ion;

    a second conduit to supply product gas resulting from recombination of intermediate ions to an outlet, whereinthe reaction time T to reach 95%, preferably 99%, of the equilibrium conversion of said intermediate ion to said product gas is less than the ambipolar diffusion time Dt for the bulk of the ions to traverse the distance from one electrode to the other, estimated by the relationship
    Dt=d2/Da where d is the gap distance between the electrodes, or the conduit in the region of the electrodes, whichever is smaller, and Da is the ambipolar diffusivity of the plasma;

    a fluidic oscillator in one of said first and second conduits to oscillate at least the flow of product gas from said outlet;

    a liquid into which said outlet opens whereby micro bubbles of said product gas are formed in said liquid;

    whereinsaid product gas is arranged so that a majority of the product gas dissolves before said micro bubbles reach the surface of said liquid and the outlet comprises a plurality of orifices to be submerged in the liquid for the purpose of forming micro bubbles of the product gas.

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