Process Calculations GATE-2018

Q 1: The reactant (M) is converted into the product (N) in the presence of a catalyst in a fixed-bed reactor. All the flow rates (F, G, H, P, and R) in mol/s and mole fraction (M) in these streams (x_F, x_G, x_H, x_P, and x_R) are shown in the diagram.

The overall fractional conversion is

A) \frac{x_GG-x_HH}{x_GG}
B) \frac{x_GG-x_PP}{x_GG}
C) \frac{x_FF-x_HH}{x_FF}
D) \frac{x_FF-x_PP}{x_FF}

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Q 2: The ammonia (NH₃) oxidation process occurs over a catalyst as

4{\mathrm{NH}}_3+5O_2\rightarrow6H_2O+4NO

Air is supplied such that oxygen (O₂) is 20 % in excess of that required for the complete conversion of NH₃. The mole fraction of O₂ in the inlet gas mixture (NH₃ + air) is _________ (rounded off to the third decimal place).

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