A packed bed reactor is 2 m long with 0.2 m diameter. The reactor is filled...

A packed bed reactor is 2 m long with 0.2 m diameter. The reactor is filled with 1000 spherical particles with a diameter of 5 mm. Air enters the reactor at a volumetric flow rate of 0.0X m³/s. At these conditions, density of air is 1.2 kg/m3 with a viscosity y of 3.0 x 10^-5 Pa.s. Calculate:

- Porosity of the bed reactor.

- The gas mass velocity, G.

- Re number, at this value of Re would kinetics or viscous effect dominate the pressure drop?

- Pressure drop across the reactor.

x=1

Estimated required time to solve the question: 15 minutes

Expert Solution

Amanda K answered 5 months ago

A packed bed reactor is filled with catalyst material with a diameter of 1.5 mm. The...

A packed bed reactor is filled with catalyst material with a diameter of 1.5 mm. The length of the reactor is 80 cm and the catalyst has a porosity of 0.45. The superficial mass velocity of the inlet gas is 7.5 kg/m2-s with a viscosity of 1.55x10-5 kg/m-s and a density of 2.8 kg/m3. The inlet pressure is 300 kPa. Find the pressure, P, at the end (the exit) of the PBR.

A packed bed reactor is also known as a fluidized bed reactor? Only when using an...

A packed bed reactor is also known as a fluidized bed reactor? Only when using an alias Depends on the catalyst used True Always false

Solid particles of density 2500 kgm-3 were packed into a fluidized bed reactor of 2 m...

Solid particles of density 2500 kgm-3 were packed into a fluidized bed reactor of 2 m in height and 0.04 m2 in cross-sectional area. The mass and height of the packed bed are 45 kg and 1 m, respectively. The surface-volume mean diameter of the particles is 1 mm. (a) Determine the porosity of the packed bed. (b) Determine the pressure drop across the bed when a liquid of density 800 kgm-3 and viscosity of 0.002 Pa s flows through...

Air at 80oC flows through a packed bed of cylinders with effective diameter of 0.015 m...

Air at 80oC flows through a packed bed of cylinders with effective diameter of 0.015 m and length the same as the diameter. The bed void fraction is 0.40 and the length of the packed bed is 2 2 m. The air enters the bed at 1.3 atm abs at the rate of 2.45 kg/m .s. Calculate the pressure drop of air in the bed

(a) Explain briefly in what circumstances you would require a Packed Bed Reactor (PBR) in a...

(a) Explain briefly in what circumstances you would require a Packed Bed Reactor (PBR) in a chemical process. How is a PBR different from an ordinary Plug Flow Reactor (PFR). Use sketches and design equations to justify your answers. [8 marks] (b) The data in Table Q1 were obtained for the photochemical decay of liquid bromine dissolved in water when placed in sunlight: TABLE Q1 Time (min) 10 20 30 40 50 60 Bromine (ppm) 2.45 1.74 1.23 0.88 0.62...

A packed bed reactor with present of catalyst: A(g) + 0.5 B(g) --> C(g) . ....

A packed bed reactor with present of catalyst: A(g) + 0.5 B(g) --> C(g) . . -rA’ = k CA0.33CB0.66 . A student is tasked with designing the reactor and predicting the output. The student forgets to take into account the effects of pressure drop on the design. For a packed bed reactor with 100 g of catalyst, the exiting concentration of C that the student determines is likely to be equal/ greater than the exiting concentration that is predicted...

A pond 2 m in diameter is to be filled with water by a flow that...

A pond 2 m in diameter is to be filled with water by a flow that varies linearly with the level of the pond so that it reaches the maximum value of 217 lt/h when the pond is empty and is zero when the level reaches 2 m. Calculate: a) Time it takes to reach the level of 1 m. b) Time it takes to fill up completely. Discuss this last result.

What is a fluidized bed reactor? Explain the working of fluidized bed reactor in refineries with...

What is a fluidized bed reactor? Explain the working of fluidized bed reactor in refineries with a neat diagram? Mention the advantages and disadvantage of fluidized bed reactor.

A packed bed of uniform spherical particles of diameter, d= 2.5 mm, density ρs= 4000 kg/m3...

A packed bed of uniform spherical particles of diameter, d= 2.5 mm, density ρs= 4000 kg/m3 , and voidage e= 0.45 is fluidised by means of a liquid of viscosity μ= 1 mN s/m2 and density ρ= 900 kg/m3 . (a) Starting from Carman’s and Ergun’s equations reported in the attached equations sheet, derive the corresponding expressions for the minimum fluidising velocity, umf, for both equations and explain their meaning.

An 8-m-long, uninsulated square duct of cross section 0.2 m X 0.2 m and relative roughness...

An 8-m-long, uninsulated square duct of cross section 0.2 m X 0.2 m and relative roughness 10-3 passes through the attic space of a house. Hot air enters the duct at 1 atm and 91oC at a volume flow rate of 0.15 m3/s. The duct surface is nearly isothermal at 60oC. Determine the rate of heat loss from the duct to the attic space and the pressure difference between the inlet and outlet sections of the duct. Evaluate air properties...

Question