# Batch reactor problems, calculation examples

Problem

Consider the elementary reaction A → B + C which occurs in liquid state and ideal batch reactor at constant
temperature. Determine the time required for the concentration of A to become half of the its initial concentration.

reaction rate constant,K = 0.1 /sec

Assumptions

Due to constant temperature, K is constant.

Due to liquid phase reaction, we can assume total volume of liquid (which reaction occurs) is constant (V=constant).

You should know how molar balance is applied to batch a reactor.

See how molar balance is applied to batch reactorsolution

r_{A} - reaction rate

V - total volume of liquid

t - time

C - concentration

N_{A} - moles of A