An exhaust gas ozone purification method, specifically comprising: enabling a mixing reaction between an ozone stream and an exhaust gas stream, and removing nitric acid from mixed reaction products between the ozone stream and the exhaust gas stream by using an electrocoagulation device. The electrocoagulation device comprises: a first electrode (301) electrifying water spray of nitric acid; and a second electrode (302) applying an attraction force to the electrified water spray. The method can realize the purification of exhaust gas.

Operating a machine system for co-production of electrical power and filtered potable water includes operating an electrical generator by way of rotation of an engine output shaft to produce electrical power, and collecting water condensed from cooled treated exhaust from the engine for delivery to an outgoing water conduit. Operating the machine system further includes supplying electrical power produced by the electrical generator to an in situ electrical load, and to at least one ex situ electrical load such as a power grid. The in situ electrical load is produced by at least one of an exhaust conveyance device, an air conveyance device, or a water conveyance device in a water subsystem.

A CO.sub.2 trapping device mounted in a hybrid vehicle, provided with a branch passage branched from an exhaust passage, a CO.sub.2 trapping part provided at the branch passage and trapping CO.sub.2 in inflowing exhaust gas, a cooling part using electric power of the battery to cool the CO.sub.2 trapping part, a flow controlling part controlling an amount of flow of the exhaust gas flowing into the branch passage, and a CO.sub.2 trapping control part controlling the cooling part and the flow controlling part, the CO.sub.2 trapping control part controlling the flow controlling part so as to make the cooling part stop cooling and to shut off the flow of the exhaust gas to the CO.sub.2 trapping part when a charging rate of the battery becomes a predetermined SOC threshold value or less.

Operating a machine system for co-production of electrical power and filtered potable water includes operating an electrical generator by way of rotation of an engine output shaft to produce electrical power, and collecting water condensed from cooled treated exhaust from the engine for delivery to an outgoing water conduit. Operating the machine system further includes supplying electrical power produced by the electrical generator to an in situ electrical load, and to at least one ex situ electrical load such as a power grid. The in situ electrical load is produced by at least one of an exhaust conveyance device, an air conveyance device, or a water conveyance device in a water subsystem.

A CO.sub.2 trapping device mounted in a hybrid vehicle, provided with a branch passage branched from an exhaust passage, a CO.sub.2 trapping part provided at the branch passage and trapping CO.sub.2 in inflowing exhaust gas, a cooling part using electric power of the battery to cool the CO.sub.2 trapping part, a flow controlling part controlling an amount of flow of the exhaust gas flowing into the branch passage, and a CO.sub.2 trapping control part controlling the cooling part and the flow controlling part, the CO.sub.2 trapping control part controlling the flow controlling part so as to make the cooling part stop cooling and to shut off the flow of the exhaust gas to the CO.sub.2 trapping part when a charging rate of the battery becomes a predetermined SOC threshold value or less.

A thermal overload of an internal combustion engine and of cooling system of a combustion machine due to a raising of the temperature of the exhaust gas flowing through an exhaust gas line of the combustion machine, which is provided as a measure to desulfurize a NO.sub.x storage catalytic converter and/or to regenerate a particulate filter, is prevented in that before and/or during this measure, the cooling output for the coolant flowing through the cooling system is systematically increased in order to achieve a lowering of the coolant temperature to a value range that lies below what would normallythat is to say, without the simultaneous desulfurization of the NO.sub.x storage catalytic converter and/or without the regeneration of the particulate filterhave been provided for the operation of the combustion machine in a corresponding operating state of the internal combustion engine.

A system includes an engine and an exhaust conduit in communication with the engine. A water separation device has exhaust gas passageways in communication with the exhaust conduit. The water separation device has a substrate and a membrane on the substrate. The substrate is monolithic and extends around the exhaust gas passageways. The membrane is between the exhaust gas passageways and the substrate and has capillary condensation pores extending from the exhaust gas passageways to the substrate.

A thermal overload of an internal combustion engine and of cooling system of a combustion machine due to a raising of the temperature of the exhaust gas flowing through an exhaust gas line of the combustion machine, which is provided as a measure to desulfurize a NO.sub.x storage catalytic converter and/or to regenerate a particulate filter, is prevented in that before and/or during this measure, the cooling output for the coolant flowing through the cooling system is systematically increased in order to achieve a lowering of the coolant temperature to a value range that lies below what would normallythat is to say, without the simultaneous desulfurization of the NO.sub.x storage catalytic converter and/or without the regeneration of the particulate filterhave been provided for the operation of the combustion machine in a corresponding operating state of the internal combustion engine.

A system includes an engine and an exhaust conduit in communication with the engine. A water separation device has exhaust gas passageways in communication with the exhaust conduit. The water separation device has a substrate and a membrane on the substrate. The substrate is monolithic and extends around the exhaust gas passageways. The membrane is between the exhaust gas passageways and the substrate and has capillary condensation pores extending from the exhaust gas passageways to the substrate.

A method of decomposing particulate pollutants present in exhaust gases is disclosed. Also disclosed are compositions for use in the method for cleaning exhaust gases, as well as methods of preparing said compositions. Also disclosed are systems configured to carry out a decomposition process to remove particulate pollutants from exhaust gas.