Scr Exhaust Treatment System

Using a combination of physical mechanisms and chemical reactions these systems can under the right conditions achieve near complete removal of particulates.

Scr exhaust treatment system.

The present invention is directed towards methods and systems for treatment of exhaust gas from an engine. Mahindra has revealed to us that the company has adopted the selective catalytic reduction scr system for exhaust gas treatment for its 2 2 litre diesel engine in order to meet the new bs6 emissions regulations. An scr system is typically composed of three main elements. The exhaust aftertreatment devices that are applied to vehicles are diesel oxidation catalysts doc diesel particulate filters dpf and selective catalytic reduction scr catalysts.

In one embodiment an exhaust gas treatment system for a diesel engine is provided. Intake or exhaust throttling may reduce air fuel ratio and increase the exhaust temperature for the aftertreatment system e g dpf regeneration scr lnt. Compact scr system for the luna pilot vessel satisfies imo tier iii. Scr systems are virtually maintenance free with occasional dosing system filter upkeep depending on the application.

The system includes a urea selective catalytic reduction u scr catalyst in fluid communication with a diesel engine to receive an exhaust gas flow therefrom. Selective catalytic reduction scr is a means of converting nitrogen oxides also referred to as no x with the aid of a catalyst into diatomic nitrogen n 2 and water h 2 o a reductant typically anhydrous ammonia aqueous ammonia or urea solution is added to a stream of flue or exhaust gas and is adsorbed citation needed onto a catalyst as the reaction drives toward completion carbon. The aftertreatment fuel injector afi mounted on the exit pipe from the turbocharger injects diesel fuel into the exhaust stream during a regeneration cycle. For its latest pilot boat luna the dutch pilot association dpa has entrusted two man d2862 le469 engines with modular exhaust gas aftertreatment eat from man engines.

However any throttle valves placed in any part of the engine air system increase bsfc. Selective catalytic reduction system. The exhaust aftertreatment system also consists of two parts designed to increase exhaust temperature for proper dpf regeneration. Exhaust throttling generally produces less bsfc penalty than the pre compressor intake throttling.