Heavy-Duty Vehicles (HDVs) account only for 4% of the vehicle population. However, they are responsible for almost 33% of EU greenhouse gas emissions and have a high contribution to climate change. Diesel engine Heavy- Duty vehicles exhaust gas contains pollutants, hence HDV emissions regulations are becoming more and more stringent worldwide. Furthermore, in lean combustion conditions of the diesel engine, an increased concentration of oxygen is produced, making the reduction of NOx challenging. Herein, a Catalytic Emission Control System (CECS) that is consisted of a Three-Way Catalyst (TWC), a Diesel Particulate Filter (DPF), an Oxygen Reduction System (ORS) and a Reduction Catalyst (RC) is presented. The aim of this CECS is to retrofit the exhaust system of various Pre-Euro up to Euro III HDVs. The Oxygen Reduction System (ORS) is a multi-tubular formation consisted of carbonate membranes that allow the permeation of oxygen, thus eliminating the use of the corrosive and dangerous ammonia (NH3) to improve the performance of the RC. The permeated oxygen can be either released to the atmosphere or used onboard to improve the efficiency of the engine utilizing the high O2 content. Lab experiments, on carbonate membranes, showed a permeation rate up to 75 μmol/sec, which is promising for utilization for ORS scale up applications.
Towards Ammonia Free Retrofitting of Heavy-Duty Vehicles to Meet Euro VI Standards
Lect.Notes Mechanical Engineering
Vehicle and Automotive Engineering ; 2020 ; Miskolc, Hungary November 25, 2020 - November 26, 2020
2020-10-20
16 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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