Chemical Engineering - Chemical Reaction Engineering - Discussion


Which of the following will give maximum gas conversion ?

[A]. Fixed bed reactor.
[B]. Fluidised bed reactor.
[C]. Semi-fluidised bed reactor.
[D]. Plug-flow catalytic reactor.

Answer: Option C


No answer description available for this question.

Eshu Middha said: (Oct 13, 2012)  
Can any one please explain the reason behind this?

Kd Krishnan said: (May 16, 2013)  
This may be because in Semi Fluidized bed the Flow of reactant can controlled so that the contact time can be increased than the fluidised bed. In Packed bed an external force may inhibit the reaction.

Shan Rana said: (Nov 7, 2013)  
@Kd Krishan.

What do you mean about this can you please elaborate it more explicitly.

In Packed bed an external force may inhibit the reaction.

Vinay said: (Feb 9, 2017)  
What is increasing order of conversion of giving reactors?

M.V.R.Pavavsandeep said: (Mar 31, 2018)  
May I know the main difference between fluidised bed and semi fluidised bed reactors?

I think fluidised bed gives max conversion due to more surface area of the catalyst.

Salah N. Farhan said: (May 9, 2018)  
The semi fluidized bed is characterized by a fluidized bed and a fixed bed in series with single contacting vessel, adding mixer in the fluidized section.

Pratik Patel said: (May 28, 2018)  
A Semi-fluidized bed can be viewed as the combination of a batch fluidized bed at the bottom and a fixed bed at the top within a single vessel. This type of technique overcomes the disadvantages of fluidized bed namely back mixing of solids, attrition of solids and problems involving erosion of surfaces. This also overcomes certain drawbacks of the packed bed, viz, Non-uniformity in temperature in the bed, channel flow and segregation of solids.

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