Volume 29: Closing Carbon Cycles – A Transformation Process Involving Technology, Economy, and Society: Part IV

The Effect of Urea Injectors to Optimize Ammonia Uniformity and NOx Conversion in SCR System Muhammad Khristamto Aditya Wardana, and Ocktaeck Lim



The Euro 3 Koreans heavy-duty diesel engines produce the high NOx pollutant and harmful for human body. The effective method to reduce nitrogen oxide (NOx) pollutions is the selective catalytic reduction (SCR) system. This study deals with problems in the urea evaporation and decomposition process in heavy duty diesel engine with 12.000cc. The ammonia quantity and quality were sampled at the catalyst inlet using a 18 gas sensor, and samples of NOx from each urea injector were compared by experiments and simulations using STAR-CCM+ software. The results elucidate the saturation phenomena, vaporization phenomena, urea distribution patterns, and NOx reduction efficiency value urea injectors.

Keywords Ammonia Value, Solid deposit, Evaporate, selective catalytic reduction, Heavy-duty diesel engine, Urea Water Solution (UWS)

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