A system for removing dust from exhaust gas, comprising a dust removing system inlet, a dust removing system outlet, and an electric field apparatus (1021). The electric field apparatus (1021) comprises an electric field apparatus inlet, an electric field apparatus outlet, a dust-removing electric field cathode (10212) and a dust-removing electric field anode (10211). The dust-removing electric field cathode (10212) and the dust-removing electric field anode (10211) are used to generate an ionizing electric field for dust removal. When a certain amount of dust has accumulated on the electric field apparatus, the electric field apparatus performs a black carbon removal process, thereby avoiding a reduced electrode gap resulting from an increased thickness of black carbon.

An engine exhaust gas treatment system, comprising an exhaust gas dust removal system and an exhaust gas ozone purification system. The exhaust gas dust removal system comprises an exhaust gas dust removal system inlet, an exhaust gas dust removal system outlet, and an exhaust gas electric field apparatus (1021). The exhaust gas electric field apparatus (1021) comprises an exhaust gas electric field apparatus inlet, an exhaust gas electric field apparatus outlet, an exhaust gas dust removal electric field cathode (10212), and an exhaust gas dust removal electric field anode (10211). The exhaust gas dust removal electric field cathode (10212) and the exhaust gas dust removal electric field anode (10211) are configured to produce an exhaust gas ionized dust removal electric field. The engine exhaust gas treatment system is able to effectively remove particles in engine exhaust gas, and the purification treatment effect for engine exhaust gas is good.

A co-current contacting system for removing impurities from a gas stream is described herein. The co-current contacting system includes a co-current contactor configured to co-currently flow a gas stream including impurities and a liquid stream through the co-current contactor. The co-current contactor is also configured to incorporate liquid droplets formed from the liquid stream into the gas stream, such that the impurities from the gas stream are absorbed by the liquid droplets. The co-current contacting system also includes a separator configured to remove the gas stream from the liquid droplets including the impurities, generating a purified gas stream and a rich liquid stream. The co-current contacting system is configured to recycle the rich liquid stream for reuse as a portion of the liquid stream flowing into the co-current contactor.

An ozone generating system, a controller and a method for generating ozone in an enclosed space is provided. The system can include a housing, an intake vent, an exhaust vent, a blower provided in the housing, an ozone generator to route generated ozone into the enclosed space and an ozone sensor. The controller and method can include adding ozone to air in an enclosed space to form ozone enriched air, until a set ozone target level is reached and maintaining the ozone level in the enclosed space in a desired ozone range for a treatment time period.

An exhaust dust removal system includes an electric field device (1021) and a cooling device. The electric field device (1021) has an electric field device inlet, an electric field device outlet, a dust removal electric field cathode (10212), and a dust removal electric field anode (10211). The dust removal electric field cathode (10212) and the dust removal electric field anode (10211) are used to generate an ionizing dust removal electric field. The cooling device is used to reduce the exhaust temperature before the electric field device inlet. The exhaust dust removal system may help reduce greenhouse gas emissions, and may also help reduce emissions of harmful gases and pollutants, which thereby makes the gas emissions more environmentally friendly.

An exhaust gas dust removal system, comprising a dust removal system inlet, a dust removal system outlet and an electric field apparatus, the electric field apparatus comprising an electric field apparatus inlet, an electric field apparatus outlet, a dust removal electric field cathode and a dust removal electric field anode, the dust removal electric field cathode and the dust removal electric field anode being used for producing an ionising dust removal electric field. A dust collection area of the dust removal electric field anode is larger than a discharge area of the dust removal electric field cathode, so that an asymmetric electrode attraction force is produced between the electrodes, to reduce electric field couplings.

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.

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.

A method for trapping noble gas atoms and molecules in oxide nanocages that includes providing oxide nanocages on a metallic substrate, ionizing a noble gas to form noble gas cations, applying a voltage to the metallic substrate, contacting the oxide nanocages with the noble gas cations, and deionizing the cations to form noble gas atoms and molecules that are trapped within the oxide nanocages. In one embodiment of the present device, polygonal prism organosilicate cages on a ruthenium thin film can trap noble gases.

A gas detection unit is accommodated within a housing of a gas sensor and the outside atmosphere of the housing is introduced through the filter to the gas detection unit. The filter comprises an organic polymer gas-permeable filter removing siloxanes and an inorganic filter removing alcohols and passing gases to be detected.