Streamyield Weight Fraction

FEED

NATURAL GAS 1.0000

TOTAL FEED 1.0000 PRODUCT

HYDROGEN 0.5640

LOSS 0.4360

TOTAL PRODUCT 1.0000

Table 5-6 Utility Consumption (per Ton Feed)

UTILITY

UNITS

CONSUMPTION

POWER

kWhr

450.80

FUEL

mmBtu

35.90

STEAM

mmBtu

1.70

COOLING WATER

MIG*

16.10

*MIG = 1000 IMPERIAL GALLONS.

*MIG = 1000 IMPERIAL GALLONS.

steps: an absorption step at elevated pressure, in which C02 is absorbed in an aqueous solution of potassium carbonate, and a regeneration step at near atmospheric pressure, in which C02 is stripped from the carbonate solution to make it suitable for reuse in the absorption step. The basic reaction involved is as follows:

On absorption of C02, potassium carbonate in solution is converted into potassium bicarbonate, as shown by the equation. The reaction is reversed in the regenerator by steam stripping the solution and lowering the pressure.

After leaving the low-temperature CO converter, the gas is cooled to approximately 335°F by reboiling in Benefield solution regenerator E-109. The gas leaves this reboiler at approximately 265°F and enters a knockout drum, where the condensed water is removed. The gas next enters C02 absorber C-104, where C02 is reduced to 0.2% by contacting

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