Superficial linear velocity

The size of reactor is chosen to accommodate this holdup. The diameter is determined from the gas flow rate, q, together with, for example, an allowable superficial linear gas velocity, u (in lieu of an allowable (- AP)) D = (4qhru)m for a cylindrical vessel. The volume could be determined from an appropriate bed density, together with an overhead space for disengagement of solid and gas phases (we assume no carryover of solid in the gas exit stream). 

The use of a U-tube sequence operated at less than 1 atm and temperatures below —78 °C. The use of such a reduced-pressure trap would allow lower trap temperatures without the collection of solid C02 and would also increase the superficial linear velocity of the gas as it passes through the trap. This type of a system appears feasible but was not investigated during this program because other concepts seemed to offer comparable or better collection efficiencies. 

Compressed into a 6-inch (ID = 5.761 inches) pipeline at 1000 psia is 2.4 MMscfd of the separator gas of page 9 of Table 10-1. Assume the temperature is 100°F. Calculate the actual volumetric flow rate in cubic feet per day, the mass flow rate in pounds per hour, and the superficial gas velocity (average linear velocity) in feet per second. Assume the heptanes plus fraction has the properties of n-heptane. 

For a vessel containing 5000 gal of liquid with specific gravity = 0.9 and viscosity of 100 cP, find size and speed of a pitched turbine impeller to deliver 2 HP/1000 gal. Check also the superficial linear velocity and the blend time. 

V = superficial linear gas velocity (based on cross-sectional area of empty tower), ft/s... 

V = superficial linear gas velocity based on empty tower = 1.8 ft/s WT = average tray width perpendicular to direction of fluid flow = 9 ft Ql/wt = = O.lll ft3/(sXft)... 

Effect of operating pressure in packed distillation column on maximum allowable gas rates as superficial linear velocity and mass velocity. 

Vc = linear velocity of gas in riser, reversal area, or annulus of bubble cap (maximum value) or in sieve hole, ft/s = maximum allowable superficial linear velocity of gas (based on net cross-sectional area of tower for vapor flow), ft/s, see Eq. (3)... 

Fig 1. Frontal loading adsorption isotherms of conventional "wide pore" derivatised silica (Brownlee RP-300) and macroporous divinylbenzene crosslinked polystyrene (Poros RII/H) supports. Protein 1 mg/ml solution in aqueous 0.1% TFA. Superficial linear flow velocities 347, 866, 1732 and 3465 cm/h. Temperature 25°C. (A) RP-300 2.1 mm ID cartridge. (B) Poros RII/H 2.1 mm ID column. 

Fig 2. Rapid reversed-phase chromatography of standard proteins. Supports RP-300 (panels A B) Poros RII/H (panels C D). Chromatographic conditions linear 6-ml gradient of 0-100%B. Solvent A aqueous 0.1% TFA, Solvent B aqueous 0.1% TFA containing 60 % acetonitrile. Temperature 45°C. Chromatographic runs performed at superficial linear flow velocities of 173 cm/h (0.1 ml/min) (A, C) and 3465 cm/h (2.0 ml/min) (B, D). Proteins (5 pg) 1, ribonuclease-B 2, chick lysozyme 3, bovine serum albumin 4, myoglobin 5, carbonic anhydrase 6, ovalbumin. 

Figure 13.39. The Sherwood-Lobo correlation of flooding limit in random packed beds, is the superficial linear velocity of the gas, is the ratio of viscosities of the liquid and...

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