How does an Egyptian urea plant at Ain Sokhna calculate CBAM embedded emissions?

Question

Senseible · Accepted Answer

Add the embedded emissions of the ammonia consumed, about 0.567 t per tonne of urea, to the urea plant's own direct emissions from fuel and its indirect emissions from electricity, then divide by tonnes of urea. Do not subtract the CO2 that goes into the urea from the ammonia plant's figure. Urea, CO(NH2)2, has a molar mass of 60.06. Each molecule uses two ammonia molecules, 2 x 17.031 = 34.06, so a tonne of urea contains the nitrogen of 34.06 / 60.06 = 0.567 t of ammonia. Your plant's actual consumption will be slightly higher because of losses; use your metered figure. Urea synthesis takes CO2 from the ammonia plant. Under the EU ETS monitoring rules CBAM is modelled on, that CO2 counts as emitted at the ammonia step and is not subtracted, because it is released when urea is applied to soil. Check the CBAM monitoring rules for your reporting period before treating it differently. Fertiliser goods are charged on direct and indirect emissions, so meter the electricity for synthesis, prilling or granulation, and compression, and apply the factor the CBAM rules allow.

How does an Egyptian urea plant at Ain Sokhna calculate CBAM embedded emissions?

Why 0.567

CO2 bound in urea

Fertilisers count electricity

Worked example: one tonne of urea (illustrative inputs)

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