Achieving BS-IV Emission Targets for Diesel Small Commercial Vehicle (SCV) with Close Coupled Advanced EnviCat<sup>®</sup> DOC and Coated PM Metalit<sup>®</sup> After - Treatment System

Bhatt, Dushyant; Waje, Shivraj; Babu, K. V. R.; Henn, Jürgen; Seifert, Sven; Cursetji, R. M.; Kumar, Dinesh; Siddiquie, T. A.

doi:10.4271/2013-26-0054

Cited by 1 publication

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“…The typical ratio of NO: NO 2 in a diesel exhaust is ∼90:10 (Diesel engines, from its total NOx, emits majority of NO (> 90%) with a smaller amount being in the form of NO 2 [10]. A DOC catalyst upstream of the SCR designed to convert NO to NO 2 is often adopted as a strategy to enhance the SCR rate particularly at low temperatures.…”

Section: Experimental Set Upmentioning

confidence: 99%

Low Temperature Selective Catalytic Reduction of NOx over Vanadium-Based Catalysts

Narkhede¹,

Kumar²,

Cursetji³

et al. 2015

SAE Int. J. Engines

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Diesel engines are becoming popular because of more fuel efficient and durability. While the CO and HC impurities are significantly lower than in gasoline engines, the design strategies for reduction of Particulate Matter and Nitrogen Oxides remain a major challenge for environment. The work mainly focused on reduction of NOx from diesel engines using SCR technology under Indian driving conditions and furl availability. With BS III/IV fuel available in the country, the catalyst system of choices the Vanadia Tungsten Titania (VWT) system because of its proven resistance to Sulfur poisoning. However, under urban driving conditions on Indian roads, the major obstacle is the low engine out temperatures which are below the normal operating temperature window (200 to 450 °C) of VWT -SCR.The objective of the present investigation is to develop low temperature SCR catalyst system that outperforms the existing commercial catalytic system during the cold start and low load operating conditions. This work focused on modifying the preparation parameters so as optimize the activity of Vanadium for NOx reduction in the temperature range between 200 -450°C.With the help of sophisticated catalyst characterization tools, novel and highly active formulations of vanadium has been developed, which is more active at lower temperatures as well as do not catalyze the undesirable reactions such as those leading to N 2 O formation. The metal oxide catalysts are designed and developed to obtain innovative and attractive solutions for the reduction of NOx emissions during cold start and low load operating conditions. The influence of various operating parameters such as NO 2 /NOx ratio, NH 3 /NOx ratio, space velocity over the typical temperature range on performance of an optimized SCR formulation are investigated for proper design and sizing of the after treatment system.

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Section: Experimental Set Upmentioning

confidence: 99%

Low Temperature Selective Catalytic Reduction of NOx over Vanadium-Based Catalysts

Narkhede¹,

Kumar²,

Cursetji³

et al. 2015

SAE Int. J. Engines

Self Cite

View full text Add to dashboard Cite

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Achieving BS-IV Emission Targets for Diesel Small Commercial Vehicle (SCV) with Close Coupled Advanced EnviCat^® DOC and Coated PM Metalit^® After - Treatment System

Cited by 1 publication

References 2 publications

Low Temperature Selective Catalytic Reduction of NOx over Vanadium-Based Catalysts

Low Temperature Selective Catalytic Reduction of NOx over Vanadium-Based Catalysts

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Achieving BS-IV Emission Targets for Diesel Small Commercial Vehicle (SCV) with Close Coupled Advanced EnviCat® DOC and Coated PM Metalit® After - Treatment System

Cited by 1 publication

References 2 publications

Low Temperature Selective Catalytic Reduction of NOx over Vanadium-Based Catalysts

Low Temperature Selective Catalytic Reduction of NOx over Vanadium-Based Catalysts

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Achieving BS-IV Emission Targets for Diesel Small Commercial Vehicle (SCV) with Close Coupled Advanced EnviCat^® DOC and Coated PM Metalit^® After - Treatment System