Rate of Reaction in Chemical Reactors // Reactor Engineering - Class 3

[@pawank1238]

I have this Course in my 3rd year of BTech. Awesome Videos. Thank you so much for uploading.

[@ChemicalEngineeringGuy]

Hey Pawan! Thanks for commenting! And yeah its a very typical course for that year... please share this channel with your friends and colleagues so we can grow faster! I want to upload more courses XD Good luck in your Bachelor!

[@hazhaahmad5269]

whats teh reaction rate for fixed bed plug flow reactor ?

[@ChemicalEngineeringGuy]

Hi, what exactly do you mean?

[@mahmoudgamal25]

Awesome

[@ChemicalEngineeringGuy]

thnx!

[@abdelmalekbellal2645]

thanks it's great

[@ChemicalEngineeringGuy]

+abdelmalek bellal Im glad it helped!

[@farahsoraya9777]

can you help me with rC and rD? why is it "appears" with positive for C eventhough C is the product but you wrote -rD when D also product? why don't you put rC and rD as a product "appears" instead of -rC and rD as a product? you're right it is really tricky and I am stuck in here Many thanks!

[@ChemicalEngineeringGuy]

Yeah! Its tricky. So both values are "POSITIVE". So rC and rD are positive. Lets say rC = 1 and rD = 1 (both positives). Due to math, if I add a negative sign in rD; then, for the math balance, the 1 must be positive. That is rD = 1 is true if -rD = -1 is true! NOTE that this has only mathematical meaning, no actual engineering value!

[@sadiorafi6440]

As in CSTR and PFR, the accumulation is zero because of steady state condition.. Thats mean dNi/dt=0.. Then why not rate of reaction ri is zero.. Because according to u.. ri=(dNi/dt)/V.. So as dNi/dt is zero in CSTR and PFR then why ri is not zero in those case... Can u plz tell me that...

[@ChemicalEngineeringGuy]

the accumulation is 0, you are not generating or losing moles in general... they are just reacting, but you can measure that reaciton rate... I dont know if that makes it clearer

[@Vishal-je3nh]

Rate of accumulation is zero...Not the whole rate i think

[@jtzabani]

The elementary reaction A +B➡C occurs in a liquid phase batch reactor. the reactor is initially charged with 2 moles of A and 3 moles of B. How will the concentration of C in the reactor change with time?