# Chemical Reaction Engineering

#### Rahulx084

I'm confused in the balancing of a reactor , lets say the inlet volumetric flow rate is $v_○$ and outlet volumetric flow rate is $v_1$
Doubts:
1) How is the volumetric flow rate and volume of the reactor $V$ are related to each other ?
2) If the volumetric flow rate is constant ( $i.e$ $v_○=v_1$ ) , is the Volume of the reactor $V$ is going to be same? If yes whats the reason,if not why not?
3) What does generation, consumption, accumulations means in a reactor and how these all are related together with the volumetric flow rate and volume of the reactor $V$ .
Thanks
Maybe these all are related to general mole balance

Related Materials and Chemical Engineering News on Phys.org

#### anorlunda

Mentor
Gold Member
We generally balance mass flows, not volumetric flows. Mass is conserved. Volume is not conserved.

All of your questions apply to any pipe and tank arrangement, not just reactors. So, try a simpler case first. Think of a tea kettle instead of a reactor .

#### Rahulx084

We generally balance mass flows, not volumetric flows. Mass is conserved. Volume is not conserved.

All of your questions apply to any pipe and tank arrangement, not just reactors. So, try a simpler case first. Think of a tea kettle instead of a reactor .
Actually I'm balancing mole using volumetric flow rates ,e.g $n_{a○}=C_{a○}.v_○$
Where $n_{a○}$= molar inflow rate of species a
$C_{a○}$= concentration of species a inflow
$v_{a○}$=inlet flow rate

#### Chestermiller

Mentor
I'm confused in the balancing of a reactor , lets say the inlet volumetric flow rate is $v_○$ and outlet volumetric flow rate is $v_1$
Doubts:
1) How is the volumetric flow rate and volume of the reactor $V$ are related to each other ?
2) If the volumetric flow rate is constant ( $i.e$ $v_○=v_1$ ) , is the Volume of the reactor $V$ is going to be same? If yes whats the reason,if not why not?
3) What does generation, consumption, accumulations means in a reactor and how these all are related together with the volumetric flow rate and volume of the reactor $V$ .
Thanks
Maybe these all are related to general mole balance
All of these things are explained clearly in books on reaction engineering, such as Levenspiel or Fogler. Your questions suggest that you haven't been exposed to anything on this subject yet. The volume flow rate and reactor volume are independent parameters that are unrelated.

"Chemical Reaction Engineering"

### Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving