Our website is made possible by displaying online advertisements to our visitors. Please consider supporting us by whitelisting our website.

Process Equipment and Plant Design

The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally _____________ inches?

Process Equipment and Plant Design /
The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally _____________ inches?

A. 6
B. 12
C. 18
D. 36

The minimum plate spacing in most of the petroleum refinery distillation columns (of dia > 3 ft) is normally _____________ inches? Read More »

Process Equipment and Plant Design

Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________?

Process Equipment and Plant Design /
Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________?

A. Relative volatility is close to one (e.g., separation of close boiling isomers)
B. Feed is not at its bubble point
C. Number of equilibrium stages in only stripg section is to be calculated
D. Number of equilibrium stages required is likely to be very small

Smoker’s equation for the calculation of number of equilibrium stages in a continuous binary distillation column is used, when the_________________? Read More »

Process Equipment and Plant Design

In actual operation of a bubble cap distillation tower, the ______________ at the bottom of the tower is more than that at the top of the tower?

Process Equipment and Plant Design /
In actual operation of a bubble cap distillation tower, the ______________ at the bottom of the tower is more than that at the top of the tower?

A. Molal flow rate of vapour
B. Vapour molecular weight
C. Pressure and temperature
D. All A., B. and C.

In actual operation of a bubble cap distillation tower, the ______________ at the bottom of the tower is more than that at the top of the tower? Read More »

Process Equipment and Plant Design

Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?

Process Equipment and Plant Design /
Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ?

A. η = 17 – 61.1 log μ
B. η = 24.6 (Δp/μ)
C. η = 1.66 – 0.25 log μ
D. η = 0.25 log μ – 1.67

Overall distillation column efficiency for most of the refinery columns can be given by (for μ = 0.07 – 1.4 cp and relative volatility < 4) (where ε = overall column efficiency, % μ = molal average viscosity of feed at average column temperature and pressure, cp Δp = pressure drop per tray, psi) ? Read More »

Process Equipment and Plant Design

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing?

Process Equipment and Plant Design /
The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing?

A. 1-5
B. 20-40
C. 100-150
D. 1000-1500

The operating velocity in the absorption tower is usually 40-50% of the flooding velocity. Packed absorption towers are normally designed for a pressure drop of about _________________ mm of water column per metre height of packing? Read More »

Process Equipment and Plant Design