Industrial Consultancy & Sponsored Research (IC&SR) , IIT Madras
System for Treatment of Exhaust Gases of Diesel Engines
Categories for this Invention
Category- Green Technology
Applications– Automotive, Heavy-Duty Vehicles,
Industry- Automotive Manufacturing, Industrial Machinery, Transportation
Market – Global automotive selective catalytic reduction market size is projected to grow from $13.85 billion in 2023 to $20.90 billion by 2030, at a CAGR of 6.1%.
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Problem Statement
- Current Selective Catalytic Reduction (SCR) systems suffer from various limitations including incomplete conversion of urea into ammonia, non-uniform ammonia distribution, ammonia slipping, and solid deposit formation due to spray-wall interaction, leading to reduced efficiency and increased maintenance costs.
- Solid deposition on the duct walls is evident even at higher temperatures of exhaust gases, indicating the need for a solution that addresses this issue efficiently.
- There is a critical need for the development of an affordable exhaust treatment system that overcomes the shortcomings of conventional SCR technology (Fig. 1).
Technology
- The system (300) utilizes ultrasonic atomizers (304) to generate a fine mist of Urea Water Solution (UWS) with droplets ranging from 5 µm to 10 µm, enhancing evaporation efficiency and minimizing solid deposition. (Fig. 2)
- By connecting the injector (310) to the exhaust duct via a mist delivery tube (306), the system prevents direct exposure of the injector to hot exhaust gases, preventing damage and promoting faster droplet evaporation within the tube.
- The finer size of the UWS mist facilitates better mixing of ammonia with the exhaust gases near the injector tip, leading to more uniform spatial distribution at the catalyst entrance and significantly reducing solid deposition, thus enhancing overall performance.
Key Features / Value Proposition
Efficient Exhaust Gas Treatment:
- Offers a highly efficient system for treating exhaust gases from diesel engines, reducing nitrogen oxides (NOx) emissions and improving air quality.
Minimized Solid Deposition:
- Utilizes ultrasonic atomizers to generate fine Urea Water Solution (UWS) mist, minimizing solid deposition on duct walls and reducing maintenance requirements.
Enhanced Evaporation Efficiency:
- Connects the injector to the exhaust duct via a mist delivery tube, promoting faster evaporation of UWS mist and ensuring optimal performance.
4. Cost-Effective Solution:
- Provides a cost-effective solution for exhaust gas treatment, offering improved performance and reduced environmental impact compared to conventional methods.
Questions about this Technology?
Contact For Licensing
sm-marketing@imail.iitm.ac.in
ipoffice2@iitm.ac.in
Research Lab
Prof. Srikrishna Sahu
Department of Mechanical Engineering
Intellectual Property
- IITM IDF Ref. 2457
- IN 528761 – Patent Granted
Technology Readiness Level
TRL – 4
Technology validated in lab scale.