Method for synthesizing organic matter and submerged plasma device

Abstract

An organic substance synthesis method according to an embodiment of the present invention is carried out using a submerged plasma device ( 1000 ), for example, and the method includes: forming a plasma through discharge in a gas including a carbon dioxide gas in contact with water; and generating an organic substance including performic acid or diformyl peroxide in the water by contact between the plasma and the water.

1 .- 4 . (canceled) 
     
     
         5 . A submerged plasma device for causing dielectric barrier discharge, comprising:
 a first electrode;   a solid dielectric layer in contact with the first electrode;   a discharge chamber having an inner space accommodating the first electrode and the solid dielectric layer;   a second electrode arranged so as to oppose the first electrode with the solid dielectric layer therebetween and so as to separate the inner space of the discharge chamber from a liquid, the second electrode having a gas phase surface located on a side of the inner space and a liquid phase surface located on a side of the liquid, and the second electrode having a plurality of through holes connecting together the gas phase surface and the liquid phase surface; and   a gas introducing device for supplying a gas into the inner space of the discharge chamber so as to form an interface between the gas and the liquid inside each of the through holes of the second electrode.   
     
     
         6 . The submerged plasma device according to  claim 5 , wherein the first electrode and the second electrode are each a flat plate. 
     
     
         7 . The submerged plasma device according to  claim 5 , wherein an opening size of each of the plurality of through holes is smaller than an interelectrode distance defined by the first electrode and the second electrode. 
     
     
         8 . The submerged plasma device according to  claim 5 , wherein an opening size of each of the plurality of through holes is smaller than 0.5 mm. 
     
     
         9 . The submerged plasma device according to  claim 5 , comprising an electrical circuit configured to apply a voltage between the first electrode and the second electrode so as to cause dielectric barrier discharge. 
     
     
         10 . The submerged plasma device according to  claim 5 , comprising a tank for at least temporarily accommodating the liquid in a stationary or flowing state, the tank allowing the liquid to be in contact with the liquid phase surface of the second electrode. 
     
     
         11 . The submerged plasma device according to  claim 5 , wherein the discharge chamber includes an opening for allowing a part of the gas having been introduced to an inside by the gas introducing device to be discharged into the liquid. 
     
     
         12 . The submerged plasma device according to  claim 5 , wherein the liquid is water. 
     
     
         13 . The submerged plasma device according to  claim 12 , wherein:
 the gas introducing device is configured to supply a carbon dioxide gas, as the gas, to an inside of the discharge chamber; and   an organic substance including performic acid or diformyl peroxide is generated in the water through discharge in the carbon dioxide gas.