Table 6 Key process inputs and specific energy use (per kg NH₃).

From: Decarbonizing ammonia synthesis plants through retrofitting novel reformer technology

Parameter

SMR configuration

Retrofitted configuration

Change (%)

Natural Gas Consumption (kg/kg NH₃)

0.52

1.36

161.5

Steam Demand (kg/kg NH₃)

1.93

1.45

−24.9

Electricity (kWh/kg NH₃)

0.544

1.043

91.7

Thermal/steam-equivalent (kWh/kg NH₃)

4.516

3.095

−31.5

Total energy use (kWh/kg NH₃)

5.06

4.14

−18.2

Air/N2 supply (normalized)

Air to secondary reformer

Dedicated N₂ blending

-

NH₃ Yield (tons/day)

1,268

1,268

matched

  1. Note: Thermal (steam-equivalent) aggregates positive process heat duties (reactors/heaters/heat-exchanger net inputs) and steam demand expressed on a kWh thermal basis. Steam conversion: 1 kg steam ≈ 0.806 kWh thermal (Δh ≈ 2.9 GJ per t HP steam); thus E_steam = 0.806 × (kg steam/kg NH₃). See Tables S1–S3 for unit-operation breakdowns. 
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