Method and system for the removal of nitrogen oxides, from flue gas at low temperatures.

The present invention relates to a SCR catalyst comprising a carrier substrate of the length L, which is a flow-through substrate, and a coating A which comprises a small pore zeolite, copper and palladium.

Methods and systems are provided for emissions control of a vehicle. In one example, a catalyst may include a cerium-based support material and a transition metal catalyst loaded on the support material, the transition metal catalyst including nickel and copper, wherein nickel in the transition metal catalyst is included in a monatomic layer loaded on the support material. In some examples, limiting nickel to the monatomic layer may mitigate extensive transition metal catalyst degradation ascribed to sintering of thicker nickel washcoat layers. Further, by utilizing the cerium-based support material, side reactions involving nickel in the transition metal catalyst with other support materials may be prevented.

An air cleaning device is disclosed. A first opening and closing member opens and closes an inlet of a housing. A second opening and closing member opens and closes an outlet of the housing. A first filter unit collects and separates foreign substances from contaminated air in the housing. A circulation tube has a first end portion disposed at the inlet to communicate with the housing and a second end portion disposed at the outlet to communicate with the housing. A third opening and closing member opens and closes the circulation tube. A first heater is installed inside the circulation tube to heat air in the circulation tube. A blower is installed inside the circulation tube to deliver air from the circulation tube into the housing.

A dust collector for an electric power tool includes a main body case, a dust box, a sliding portion, and a dust collecting route. The main body case includes an exhaust port, the main body case being configured to be installed on an electric power tool. The dust box internally includes a filter. The sliding portion is disposed on the main body case. The sliding portion has a front end on which a nozzle with a suction opening is disposed. The sliding portion is slidable in a front-rear direction. The dust collecting route is from the suction opening to the exhaust port passing through the filter. The main body case includes a guiding portion through which the sliding portion passes, and the guiding portion allows the sliding portion to project rearward when the sliding portion slides.

A dialysis system is described having components for facilitating a health-enhanced environment in the vicinity of a dialysis machine in the home. The health-enhancing components may include air improvement components and potable water supply components integrated and/or otherwise incorporated into the home dialysis machine. By incorporating the ability for monitoring, cleaning, and controlling air and/or water quality into the home dialysis machine, the dialysis machine is no longer just a source of life for the dialysis patient but also a source of health enhancement for the entire household. The system may further display and/or remotely communicate information concerning the dialysis treatment, the air quality and the potable water quality corresponding to operation of the dialysis machine in the home environment.

An off-gas conditioning system includes a source of off-gas, at least one testing port, in communication with the source of off-gas wherein the testing port is connected to a meter capable of testing at least one metric selected from the group consisting of temperature, pressure, flow rate, and humidity. A first vapor-liquid separator in communication with and downstream of the source of off-gas, a second vapor liquid separator in communication with and downstream of the first vapor liquid separator, wherein at least one of the first or second vapor-liquid separators includes a heat-exchanger for cooling the off-gas, and wherein at least one of said first or second vapor liquid separators includes a particulate filter for removing particulates from the off-gas. at least one testing port, downstream of the second vapor-liquid separator in communication with at least one analyzer for analyzing said off-gas for specific chemical compounds.

The invention relates to the technical field of the treatment of exhaust gases containing sulfur oxides, especially exhaust gases from technical combustion plants, the so-called flue gases, or exhaust gases from technical processes, such as steel production (e.g. blast furnace gases, etc.) Especially, the invention relates to a method for the treatment of exhaust gases containing sulfur oxides, in particular from technical combustion plants, such as flue gases, or from technical processes, for the purpose of removing and/or separating off the sulfur oxides or for the purpose of reducing the sulfur oxide content, as well as a system for carrying out the method.

A process for the cleaning of a lean gas stream contaminated with volatile organic compounds (VOCs) and/or sulfur-containing compounds comprises the steps of adding ozone to the contaminated lean gas stream, subjecting the ozone-containing lean gas stream to ultraviolet irradiation, thereby transforming VOCs to particles, maintaining the irradiated gas stream in a stay zone for a sufficient time to allow aerosol particle growth, and passing the gas stream through a catalytic bag filter at a temperature down to room temperature to remove the formed particles and eliminate any remaining ozone. The bag filter has been made catalytic by impregnation with one or more metal oxides in which the metals are selected from V, W, Pd and Pt, supported on TiO.sub.2.

The present invention relates to an exhaust gas purification apparatus and an exhaust gas purification method using the same. According to a specific embodiment., the exhaust gas purification apparatus comprises: a diesel oxidation catalyst (DOC) unit for convening nitrogen oxides (NO.sub.8), contained in an exhaust gas introduced therein through a gas inlet portion, into nitrogen dioxide (NO.sub.2); a composite diesel particulate filter (DPF) unit connected to the rear end of the DOC unit through an inflow line and removing harmful components including particulate substances and nitrogen oxides from the exhaust gas discharged from the DOC unit and introduced therein; and a circulation line disposed in the inflow line so as to introduce the exhaust gas discharged from the DOC unit into the gas inlet portion.