A micro-combustion device for the generation of electrical power, comprising: a combustion chamber implemented by means of an elongated cylindrical container developing along a longitudinal axis, having an inlet end, a discharge end with at least a discharge duct and internal cylindrical walls, wherein: • at the inlet end one or more injection ducts (7, 8) are provided for inserting an oxidising agent, a fuel and/or a mixture thereof arranged perpendicularly to said longitudinal axis, wherein at least the injection of said oxidising agent takes place tangentially to the inner cylindrical wall, so as to induce a helical combustion path; • the internal cylindrical walls have a deposition of catalytic material, to induce a combustion reaction; a turbo compressor group, comprising a compressor, feeding under pressure said combustion chamber through said one or more injection ducts, and a turbine, receiving the flue gases from said discharge duct, compressor and turbine being keyed on the same axis, whereon a generator of electrical power, in turn, is keyed; a fuel cell implementing an electrochemical process for the generation of additional electrical power, the fuel cell being fed by the flue gases through said turbine and by the oxidising agent, wherein the micro-combustion device comprises a first injection duct for a fuel and a second injection duct for the oxidising agent, the first injection duct for the fuel being arranged perpendicularly both to said longitudinal axis and to the internal cylindrical wall of the cylindrical container in a connection point, the second injection duct being arranged perpendicularly to said longitudinal axis and tangentially to the internal cylindrical wall of the container, so as to induce a helical path to the flow and to the combustion reaction. a combustion chamber implemented by means of an elongated cylindrical container developing along a longitudinal axis, having an inlet end, a discharge end with at least a discharge duct and internal cylindrical walls, wherein: • at the inlet end one or more injection ducts (7, 8) are provided for inserting an oxidising agent, a fuel and/or a mixture thereof arranged perpendicularly to said longitudinal axis, wherein at least the injection of said oxidising agent takes place tangentially to the inner cylindrical wall, so as to induce a helical combustion path; • the internal cylindrical walls have a deposition of catalytic material, to induce a combustion reaction; • at the inlet end one or more injection ducts (7, 8) are provided for inserting an oxidising agent, a fuel and/or a mixture thereof arranged perpendicularly to said longitudinal axis, wherein at least the injection of said oxidising agent takes place tangentially to the inner cylindrical wall, so as to induce a helical combustion path; • the internal cylindrical walls have a deposition of catalytic material, to induce a combustion reaction; a turbo compressor group, comprising a compressor, feeding under pressure said combustion chamber through said one or more injection ducts, and a turbine, receiving the flue gases from said discharge duct, compressor and turbine being keyed on the same axis, whereon a generator of electrical power, in turn, is keyed; a fuel cell implementing an electrochemical process for the generation of additional electrical power, the fuel cell being fed by the flue gases through said turbine and by the oxidising agent, wherein the micro-combustion device comprises a first injection duct for a fuel and a second injection duct for the oxidising agent, the first injection duct for the fuel being arranged perpendicularly both to said longitudinal axis and to the internal cylindrical wall of the cylindrical container in a connection point, the second injection duct being arranged perpendicularly to said longitudinal axis and tangentially to the internal cylindrical wall of the container, so as to induce a helical path to the flow and to the combustion reaction.