The current study is aimed for reduction of NOx emission (oxides of nitrogen) from a direct injection CI engine by SCR (selective catalytic reduction) technology. The SCR system was developed originally at the (CAER) Centre for alternate and renewable energy in which zeolite was used as a catalyst. The developed SCR system was integrated with a single chamber direct injection CI engine of 3.7 kW rated power at 1500 rpm. Experimental tests results revealed the significant reduction of NOx emission with SCR system at all engine loads. Experimental design of the investigation typified obtaining standard behaviour of the engine i.e., without SCR followed by engine's information after the presentation of SCR framework. It is investigated from the exploratory tests results that hydrocarbon (HC) emission was highest about 20ppm at 10kg load yet at 4kg load it decreased to 16ppm. Carbon monoxide (CO) emission was moderately increased with SCR system. NOx emission are minimum with SCR at all engine loading conditions as compared to without SCR system. An experimental time study is also done & readings being taken in the time interval of 5 minutes. A difference of 10ppm hydrocarbon emission has been measured in between 15-20 minutes. In the NOx emissions, a difference of 97 ppm has been observed while using the SCR system. Henceforth, the introduction of SCR to the engine minimizes the emissions & enhance the combustion performance along with the benefit of reduction in NOx emissions. After the complete analysis of the data, the outcomes demonstrate a positive impact on the selective catalyst reduction (SCR) system set up with the engine.
Selective Catalyst Reduction (SCR) Using Zeolite for Reduction of NOx Emissions in CI Engines
