A method for operating an exhaust-gas aftertreatment system arrangement is provided. The method includes in a first operating state, flowing a substantial majority of an exhaust-gas stream from the internal combustion engine through a first NO.sub.x storage catalytic converter positioned in a main exhaust branch of an exhaust aftertreatment system arrangement and in a second operating state, flowing a substantial majority of the exhaust-gas stream through a first bypass branch branching off from the main exhaust branch upstream of the first NO.sub.x storage catalytic converter and which opens into the main exhaust branch downstream of the first NO.sub.x storage catalytic converter and regenerating the first NO.sub.x storage catalytic converter.

A system for mobile carbon capture, preferably including a capture module, a regeneration module, and a storage module 130. The system can optionally include a thermal control module and/or a dehumidifier. A method for mobile carbon capture, preferably including adsorbing a target species, desorbing the target species, and storing the target species. The method can optionally include pre-treating input gas, offloading stored species, and/or regenerating desiccators.

A device for reducing emissions from an internal combustion engine having a close-coupled catalyst including an underbody catalyst and a hydrocarbon trap disposed downstream of the close-coupled catalyst. The device includes a heat exchanger and a liquid water knockout disposed downstream of the close-coupled catalyst. The device includes a three-valve system configured to dynamically adjust a flow path of exhaust from the internal combustion engine through the underbody catalyst or both the underbody catalyst and the hydrocarbon trap to reduce emissions. A method for reducing emissions including feeding an exhaust gas from the internal combustion engine to the close-coupled catalyst, producing a catalyzed exhaust gas. The method includes flowing the catalyzed exhaust gas from the close-coupled catalyst to the three-valve system.

A device for reducing emissions from an internal combustion engine having a close-coupled catalyst including an underbody catalyst and a hydrocarbon trap disposed downstream of the close-coupled catalyst. The device includes a heat exchanger and a liquid water knockout disposed downstream of the close-coupled catalyst. The device includes a four-valve system configured to dynamically adjust a flow path of exhaust from the internal combustion engine through the underbody catalyst, hydrocarbon trap, or both, to reduce emissions. A method for reducing emissions including feeding an exhaust gas from the internal combustion engine to the close-coupled catalyst, producing a catalyzed exhaust gas. The method includes flowing the catalyzed exhaust gas from the close-coupled catalyst to the four-valve system.

A vehicle includes an engine, a battery, an exhaust line including an exhaust port, an after-treatment system, an EGR line, an EGR pump, and a NOx adsorber. The engine generates power from a combustion reaction that produces exhaust gases. The battery stores electrical power. The after-treatment system reduces Nitrogen Oxides (NOx) content in the exhaust gases. The EGR line recirculates exhaust gases from the exhaust line upstream of the after-treatment system. The EGR pump recirculates exhaust gases from the exhaust line downstream of the after-treatment system. The NOx adsorber captures and stores the NOx content from the exhaust gases. The NOx adsorber includes an adsorber inlet line and an adsorber outlet line connected to the exhaust line, and the exhaust line extends between the adsorber inlet line and the adsorber outlet line to bypass the NOx adsorber.