This test method covers the determination of hydrocarbon contamination in urea liquor extracted with an infrared-amenable membrane and measured by infrared transmission through the membrane.
Urea is used as a nitrogen or ammonia source for industrial feedstocks and as a NOx abatement reagent in selective catalytic reactions (SCR). Urea Liquor used to make Diesel Exhaust Fluid (DEF) is of higher purity than agricultural urea. Hydrocarbon contamination from lubricants in process machinery can affect the quality of the final Urea Liquor product. Rapid measurement of hydrocarbon contamination is necessary to diagnose process upsets and to ensure the highest purity possible in the final product.
KeywordsUrea; hydrocarbon contamination; liquor
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top