Chemical Reaction Engineering - Chemical Engineering Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Mean residence time is equal to the space time, when

the feed rate is measured at temperature and pressure in the reactor.

the temperature, pressure and the density of reaction mixture remains constant throughout the reactor.

there is no change in number of moles in gaseous reaction.

all (a), (b) and (c).

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

If 'n' is the order of reaction, then unit of rate constant is

1/(time)(concentration)^{n - 1}

(time)^-1 (concentration)^{n - 1}

(time)^{n - 1} (concentration)

none of these

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Batch process is preferred over continuous process, when the

product yields and quality can not be achieved in continuous process, because of long residence time.

sales demand of product is not steady.

same equipment can not be used for several processes of the same nature.

all (a), (b) & (c)

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

With the same reaction time, initial concentration and feed rate, the reaction 2A B is carried out separately in CSTR and P.F. reactor of equal volumes. The conversion will be

higher in P.F. reactor

higher in CSTR

same in both the reactors

data insufficient; can't be predicted

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

For any reaction, we may write conversion as a function of

time

temperature

concentration

all (a), (b) & (c)

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

The use of space time is preferred over the mean residence time in the design of a/an

batch reactor

ideal tubular-flow reactor

slurry reactor

CSTR

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL

Autocatalytic reactions are best carried out in a

CSTR

CSTR in series

plug flow reactor

recycle reactor