Generator device of cold plasma and related method for producing chemical substances

A generator device of cold plasma for use in a process for producing any of an acid, nitric acid, sulphuric acid, ammonium nitrate, ammonium sulphate, calcium nitrate, NO, NO2, NOR, NxOx or oxidized VOCs, the device comprises:

• a first electrode and a second electrode, arranged so as to define between them a plasma generation region, which first and/or second electrode are connected or connectable to a power source so that, in use, a difference in electric potential is established at said plasma generation region;
• an inlet port for a gas which has to cross said plasma generation region for generating a plasma gas, at least a recirculation outlet port for recirculating the plasma gas which has crossed said plasma generation region, and an outlet port for outleting the plasma gas, wherein the outlet port is arranged downstream of the at least one recirculation outlet port with respect to flow of the plasma gas;
• and
• a main body, said first electrode being at least partially received within said main body, wherein said inlet port and/or said at least a recirculating outlet port are obtained on said main body, and said inlet port or said at least a recirculating outlet port is arranged at an end of said main body, and wherein said main body has a plurality of recirculation outlet ports for the plasma gas, wherein the inlet port and the at least one recirculation outlet port are arranged orthogonal to each other;
• wherein the device is configured so that said second electrode is a liquid electrode and the first electrode is rotatable.