Calculation formula for the nitrogen gas volume in theoretical stripping for NHD decarburization
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I would like to ask: the calculation formula for the amount of nitrogen to be stripped using NHD decarburization theory
Here is a comparison of the consumption levels for several carbon removal methods in the SHELL gasification process:
Parameter: Selesol, Rectisol, NHD
Electricity consumption (kWh): 60.21, 29.60, 43.41
Recycled water volume (m3): 45.59, 15.50, 12.00
Steam consumption (t): 0.85 (0.59 MPa), 0.058 (1.3 MPa), 0.306 (0.90 MPa), 0.39 (0.35 MPa)
Strip gas (N2) volume (Nm3): 684, 280, 578
Cooling energy required (GJ): 0.126 (1.5°C), 0.358 (-40°C), 0.137 (-15°C)
Solvent consumption cost (yuan): 4.0, 2.7, 4.6
Investment cost per ton of ammonia (yuan): 19.91, 17.13, 14.67
Relative investment ratio: 100, 86, 74
Operating cost per ton of ammonia (yuan): 123, 97, 115
Relative operating cost ratio: 100, 79, 93
Total cost per ton of ammonia (yuan): 142.91, 114.13, 129.67
Relative total cost ratio: 100, 80, 91
Parameter: Selesol, Rectisol, NHD
Electricity consumption (kWh): 60.21, 29.60, 43.41
Recycled water volume (m3): 45.59, 15.50, 12.00
Steam consumption (t): 0.85 (0.59 MPa), 0.058 (1.3 MPa), 0.306 (0.90 MPa), 0.39 (0.35 MPa)
Strip gas (N2) volume (Nm3): 684, 280, 578
Cooling energy required (GJ): 0.126 (1.5°C), 0.358 (-40°C), 0.137 (-15°C)
Solvent consumption cost (yuan): 4.0, 2.7, 4.6
Investment cost per ton of ammonia (yuan): 19.91, 17.13, 14.67
Relative investment ratio: 100, 86, 74
Operating cost per ton of ammonia (yuan): 123, 97, 115
Relative operating cost ratio: 100, 79, 93
Total cost per ton of ammonia (yuan): 142.91, 114.13, 129.67
Relative total cost ratio: 100, 80, 91
I’m extremely grateful to the original poster. I’ve been considering these past couple of days removing the dehydration tower from the decarbonization system and replacing it with nitrogen stripping, and this information has been a great help to me. I hope you can continue to assist me with any issues that may arise in the implementation of this solution