The Urea Industry continuously strives to reduce Ammonia and Urea dust emission from urea plants. The previous reported Round Table discussion (No.4) did collect the different solutions actually applied in urea plants to reduce the gaseous Ammonia and Urea dust emissions. This time a new interesting and challenging possible solution, injecting sulphuric acid (H2SO4) in the urea melt, will be discussed. This solution was tested at Phu My Fertilizer plant in Vietnam and immediately a lively discussion started up in our Round Tables. In the early 1980’s mixing urea with sulphuric acid was already subject of research programs and the information available in the public domain was helpful to understand better the observed phenomena.

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