The present disclosure is intended to improve HC purification performance of a catalytic device arranged in an exhaust passage of an internal combustion engine in a more suitable manner. A microwave absorber is distributed over a predetermined part in a catalytic layer of the catalytic device which is irradiated with a microwave in the exhaust passage of the internal combustion engine. Then, in the predetermined part in the catalytic layer, a content ratio of a first catalytic material, which is one of two kinds of catalytic materials of which HC purification performance is higher than that of the other, is higher than a content ratio of the first catalytic material in the other portion than the predetermined part in the catalytic layer.

There is provided an exhaust purification device including a particulate filter configured to collect particulates contained in an exhaust gas, an oxidation catalyst disposed in a front stage of the particulate filter and configured to have a carrier partially or entirely made of a material which absorbs a microwave, a housing in which the particulate filter and the oxidation catalyst are arranged, and a microwave generator configured to generate a microwave to be irradiated onto the oxidation catalyst in a direction to which the exhaust gas flows.

A method for enhancing degradation of ester volatile organic compounds with a cerium oxide supported palladium single atom catalyst under low-temperature microwave comprises the steps of firstly preparing a single atom catalyst Pd/CeO.sub.2, adding the catalyst Pd/CeO.sub.2 into a reaction cavity, initiating microwave radiation to enhance the catalysis reaction, and quickly introducing an ester compound with a concentration of 505000 mg/m.sup.3 and a space velocity of 2000100000 h.sup.1 into the reaction cavity from a vapor phase sampling port to react when the reaction temperature is 1080 C. A catalyst packed column is provided in the reaction cavity, the vapor phase sampling port is defined at the bottom of the reaction cavity, and an exhaust port is defined at the top of the cavity. The microwave method can enhance and activate active sites, prevent the aging of active sites, and enable the chemical reaction rate to be increased by more than 17.9%.

Provided are an air purification module and an air purification system including the same. The air purification module is configured to purify influent unpurified air and discharge purified air and includes: a catalyst filter including a photocatalyst and an oxidation catalyst; and a light-emitting heat source disposed adjacent to the catalyst filter, wherein the light-emitting heat source irradiates, to the catalyst filter, light for activating the photocatalyst, and provides heat to activate the oxidation catalyst, and a temperature of the light-emitting heat source is higher than a temperature of the unpurified air.

An exhaust-gas treatment apparatus capable of efficiently making a harmful gas containing in an exhaust gas harmless without increasing a size of the apparatus is disclosed. The exhaust-gas treatment apparatus includes a main body in which a flow passage is formed for a liquid to flow, an exhaust-gas supply line to be coupled to the main body, and for supplying the exhaust gas to the flow passage through which the liquid flows, a suction device configured to suck the exhaust gas from the exhaust-gas supply line into the flow passage, a low-temperature plasma generator for generating low-temperature plasma in the flow passage to decompose the harmful gas, and a discharge line for discharging the exhaust gas, which has passed through the low-temperature plasma generator, from the main body.

A substance is treated using a device having: (a) a volute or cyclone head, (b) a throat connected to the volute or cyclone head, (c) a parabolic reflector connected to the throat, (d) a first wave energy source comprising a first electrode within the volute or cyclone head that extends through the outlet into the opening of the throat along the central axis, and a second electrode extending into the parabolic reflector and spaced apart and axially aligned with first electrode, and (e) a second wave energy source disposed inside the throat, embedded within the throat or disposed around the throat. The substance is directed to the inlet of the volute or cyclone head and irradiated with one or more wave energies produced by the first and second wave energy sources as the substance passes through the device.

A multifunctional microwave plasma and ultraviolet light deodorization treatment unit, which includes: a rapid decomposition device (1), a high frequency plasma electric field (2), a microwave plasma electric field (3), a high intensity ultraviolet radiation field (4), a low temperature plasma electric field (5), a high intensity ozone gas reaction chamber (6), a reaction termination chamber (7) and a clean gas organization chamber (8) sequentially installed inside a horizontal rectangular box which has an elongated body defining a horizontal axis and has a channel cavity therein. The deodorization treatment unit further includes an exhaust gas odor collecting pipe and an odor gas storage cabinet (9) connected to an air pump (10), the air pump (10) is connected to an odor gas inlet of the rapid decomposition device (1), the clean gas organization chamber (8) has one end connected to a clean gas exhaust pipe.

Provided are a method for capturing carbon dioxide including irradiating a reaction product (c) of an amine compound (a) and a gas (b) containing carbon dioxide with electromagnetic waves to desorb carbon dioxide from the reaction product (c); and a carbon dioxide capture system including a housing part for housing a reaction product (c) of an amine compound (a) and a gas (b) containing carbon dioxide and an electromagnetic wave irradiation part for irradiating the reaction product (c) with the electromagnetic waves.

There is provided an exhaust purification device including a particulate filter configured to collect particulates contained in an exhaust gas, an oxidation catalyst disposed in a front stage of the particulate filter and configured to have a carrier partially or entirely made of a material which absorbs a microwave, a housing in which the particulate filter and the oxidation catalyst are arranged, and a microwave generator configured to generate a microwave to be irradiated onto the oxidation catalyst in a direction to which the exhaust gas flows.

The present invention relates to the conversion of flue gas to valuable products, in particular to the conversion of carbon dioxide in flue gas to liquid fuels and valuable carbons in a carbon negative manner.