When the gas to be dissolved in liquid is a/an ___________________ then normally co-current adsorber are used?

Related Mcqs:

1. With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop___________________?

   A. Decreases B. Remains unchanged C. Increases D. Decreases exponentially...

2. Co-current absorbers are usually used when the gas to be dissolved in the liquid is ___________________?

   A. Sparingly soluble B. Highly soluble C. A pure substance D. A mixture...

3. Experiments were conducted to determine the flux of a species A in a stagnant medium across a gas-liquid interface. The overall mass transfer co-efficient based on the liquid side for dilute systems for the above was estimated to be 4 × 10-3 kg mole/m2.s. The equilibrium data for the system is given as y = 2x. The flux across the interface (in kg mole/m2 .s) for bulk concentrations of A in gas phase and liquid phase as y = 0.4 and x = 0.01 respectively is _________________________?

   A. 5.6 × 10-4 B. 8.5 × 10-4 C. 5.6 × 10-3 D. 8.5 × 10-3...

4. For the gas absorption, the height of a transfer unit, based on the gas phase is given by (G: superficial molar gas velocity, L: superficial molar liquid velocity, FG: mass transfer co-efficient, moles/m2, a: interfacial area per unit volume of tower) ?

   A. G/(FG . a) B. FG/(G . a) C. (G . a)/FG D. L/(FG . G)...

5. The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3)_________________?

   A. 500 B. 1200 C. 900 D. 800...

6. The interfacial area per unit volume of dispersion, in a gas-liquid contactor, for fractional hold up of gas = 0.1 and gas bubble diameter = 0.5 mm is given by (in m2/m3) ?

   A. 500 B. 1200 C. 900 D. 800...

7. The Reynolds number of the liquid was increased 100 fold for a laminar falling film used for gas-liquid contacting. Assuming penetrating theory is applicable, the fold increase in the mass transfer co-efficient (Kc) for the same system is_______________________?

   A. 100 B. 10 C. 5 D. 1...

8. ______________ column is preferred to be used, when a high liquid hold up is required in a reactor for gas-liquid reaction ?

   A. Packed B. Bubble C. Spray D. Tray...

9. In a vapor-liquid contacting equipment, the overall gas phase mass transfer co-efficient (M.T.C), KG is related to individual co-efficients (KG and KL) as ___________________ ?

   A. KG = 1/KG + m/KL B. 1/KG = 1/KG + m/KL C. 1/KG = 1/KL + m/KG D. KG = 1/KL + m/KG...

10. For absorbing a sparingly soluble gas in a liquid ___________________?

    A. Gas side mass transfer co-efficient should be increased B. Liquid side mass transfer co-efficient should be increased C. Liquid side mass transfer co-efficient should be decreased D. Mass transfer co-efficient must be kept constant...