An aftertreatment module is disclosed. The aftertreatment module may include a housing and a mounting plate within the housing that forms an inlet chamber and an outlet chamber. The aftertreatment module may include an inlet for exhaust gas from a combustion engine to flow into the inlet chamber and an outlet through a top plate of the housing for the exhaust gas to flow from the outlet chamber, wherein the outlet comprises a plurality of perforations. The aftertreatment module may include an outlet sensor mounted on the outlet to obtain information relating to the exhaust gas as the exhaust gas flows from the outlet chamber and a set of catalysts mounted to the mounting plate to treat the exhaust gas as the exhaust gas flows from the inlet chamber to the outlet chamber. The aftertreatment module may include a drain port through a side plate of the housing.

An engine device of this invention includes including a post-treatment device, provided in an exhaust passage of an engine, for purifying an exhaust gas from the engine. As the post-treatment device, a three-way catalyst is used. The engine device further includes a filter case including a filter body for catching deposits in the exhaust gas. The filter case is disposed, in a replaceable manner, upstream of the post-treatment device in the exhaust passage.

An exhaust tailpipe/emissions filter employs a reusable/replaceable insert and is configured to slide into and/or onto the exhaust tailpipe of the automobile to reduce air pollution.

Nitrogen oxides formed in combustion engines are recycled such that the nitrogen oxides can be utilized for producing liquid or solid chemicals. The nitrogen oxides are recycled by a method including an adsorber material adsorbing nitrogen oxides from an exhaust-gas stream of the combustion engine, removing the adsorber material laden with nitrogen oxides, desorbing the adsorbed nitrogen oxides from the adsorber material, and converting the nitrogen oxides desorbed from the adsorber material into liquid or solid nitrogen-containing compounds.

Disclosed are apparatus and corresponding methodology for a compression clamped exhaust catalyst which is incorporated into a marine exhaust header. A serviceable exhaust catalyst is compression clamped and sealed inside an enclosure associated with a marine exhaust system while still maintaining serviceability. The catalyst is seated on an inset bead or ring on the inside of the enclosure. A ring cooperates with the enclosure to clamp a mating exhaust pipe, with a gasket situated between the two. Other structures are provided to compress the catalyst in the enclosure as it is sealed. As seated, the exhaust catalyst is held into place with a compression fit to limit its longitudinal movement while still remaining accessible for servicing.

A selective catalytic reduction system may include a single housing defining a single centerline axis. The selective catalytic reduction system may also include a diesel particulate filter disposed within the single housing and having a DPF center axis aligned with the single centerline axis. The selective catalytic reduction system may also include an SCR catalyst disposed within the single housing and having a center axis aligned with the single centerline axis. In some implementations, the diesel particulate filter may include one or more SiC filters. In some implementations, the SCR catalyst may include one or more extruded SCR catalysis.

Embodiments of emission reduction system including various embodiments of an emission filters for a power plant including a gas turbine are disclosed. The system includes: an emission filter; and a retraction system operably coupled to an exhaust passage of the gas turbine. The exhaust passage defines an exhaust path of exhaust from the gas turbine. The retraction system selectively moves the emission filter between a first location within the exhaust path and a second location out of the exhaust path. In a combined cycle power plant, the first location is upstream of a heat recovery steam generator (HRSG). The systems and filters described allow for temporary positioning of emission filter(s) just downstream of a gas turbine exhaust outlet, or upstream of an HRSG, where provided, for emission reduction at low loads or startup conditions, and removal of the emission filter(s) once operations move to higher loads.

An aftertreatment system for a diesel engine is disclosed. The aftertreatment system may include a first flow conduit configured to convey an exhaust gas stream, and a first diffuser assembly positioned fluidly downstream of the first flow conduit and be configured to increase flow uniformity of the exhaust gas stream. The first diffuser assembly may include a first disperser having a honeycomb structure surrounded by a first outer frame. The first disperser may have a number of cells per square inch defining a first cell density. The aftertreatment system may also include a first selective catalytic reduction cassette positioned fluidly downstream of the first diffuser assembly, and the first selective catalytic reduction cassette may include a selective catalytic reduction catalyst.

Systems, methods, and building block modules for modular power generation facilities are disclosed. A modular power generation facility includes a plurality of primary modules and a control system. Each primary module includes eight primary corners and an interior space. The modules are positioned in a vertical stack and are attached together to form a substantially modular enclosure for the generation of electricity. The modules include gen-set modules, each having an engine-generator and a fuel tank disposed in the interior, and a switchgear module having switchgear ganged to the gen-set modules. The control system communicates with the gen-set modules to coordinate the engine-generators as a unit and to control the loading of each of the generators in response to a power load demand. The control system is disposed in one or more of the primary modules with at least part of the control system being disposed in the switchgear module.

An emissions reduction system for a combined cycle power plant having a gas turbine engine and a heat recovery steam generator (HRSG) can comprise a duct defining a flow space configured to receive exhaust gas from the gas turbine and convey the exhaust gas into the HRSG, and a louver system coupled to the duct that can comprise a plurality of emission medium panels extending across the flow space, the emission medium panels configured to be moved between a first position where adjacent filter medium panels extend contiguously across the flow space of the duct and a second position where adjacent filter medium panels include spaces therebetween to provide an unobstructed flow path and an actuator to move the plurality of panels between the first position and the second position.