2 replies to this topic

[polipo]

Hi there,

I have problem with sizing a reactor. As I've selected the weight of the catalyst for the reaction, so I converted to the reactor's volume by W = ρ_cV(1-Є). And I solve for V where void fraction is known. The problem is the residence time. It is only 0.1 second. Does it make sense? for the flow of about 100000 kg/h.
One thing I'm unsure is about the volume. Can it be larger than what I've obtained from calculation. If so, I further wonder that whether the void fraction will not be the same according to the equation stated earlier.
Or I've misunderstood some points?

Thank you for your assistance

[djack77494]

How did you select the weight of catalyst. I presume it is based on a flowrate of reactants you want to treat (react). A residence time of 0.1 second is not necessarily nonsensical. The reactor volume can be as large as you want to make it, and you can "spread out" the catalyst if desired in order to lower its density. However, this is the opposite of the direction we would normally want to move in as engineers. So tell us more.

[polipo]

How did you select the weight of catalyst. I presume it is based on a flowrate of reactants you want to treat (react). A residence time of 0.1 second is not necessarily nonsensical. The reactor volume can be as large as you want to make it, and you can "spread out" the catalyst if desired in order to lower its density. However, this is the opposite of the direction we would normally want to move in as engineers. So tell us more.

I used ASPEN PLUS to do sensitivity analysis and select the weight of catalysy that yield the maximum product. Then I convert the weight of catalyst by the formula I mentioned earlier.