Stoichiometry - Engineering

Q1:

Pick out the wrong statement about the recycle stream in a process.

A Recycling in a process stream helps in utilising the valuable reactants to the maximum with minimum loss of reactants.

B The ratio of the quantity of a reactant present in the reactor feed of a recycling operation to the quantity of the same reactant entering the process as fresh feed is called combined feed ratio.

C Recycling in a process does not help in getting higher extent of reaction.

D Recycling is exemplified by refluxing back a part of the distillate to the distillation column to maintain the quantity of liquid within the column.

ANS:C - Recycling in a process does not help in getting higher extent of reaction.

The wrong statement about the recycle stream in a process is: "Recycling in a process does not help in getting higher extent of reaction." This statement is incorrect because recycling in a process can indeed help achieve a higher extent of reaction. By continuously reintroducing unreacted reactants back into the reactor, recycling ensures that all reactants have multiple opportunities to participate in the reaction, leading to more complete conversion and higher yields of desired products. Therefore, the correct answer is: "Recycling in a process does not help in getting higher extent of reaction."