Engineering Calculators

SCR Urea Consumption

This calculator computes the amount of urea solution (diesel exhaust fluid, DEF) that is required to achieve a given conversion of NOx emissions over an SCR catalyst. The calculation assumes that all urea becomes decomposed to ammonia, which reacts with NOx according to the “standard” and/or “fast” SCR reactions.

Input Data

Enter the required input data and press the “Calculate” button to do the calculation. An asterisk will appear if your data is out of range.

g/kWh
%
% (m/m)
g/kWh
Results
g/kWh
g/kWh
g/kWh
g/kWh
% (m/m)
kg/m3
% (v/v)