Final answer:
Determining the exact removal percentage of chlorine after enhancing the flow rate, reducing particle size, and increasing the bed length in a packed bed reactor is not possible without empirical data or detailed models; however, these changes are expected to positively affect the removal efficiency.
Step-by-step explanation:
The question is about enhancing the efficiency of a process used to remove chlorine (Cl2) from a waste gas stream using a packed bed reactor. In chemical engineering, the removal efficiency of a packed bed is influenced by the gas flow rate, the particle diameter of the solid absorbent, and the length of the packed bed. To improve the efficiency from the current 63.2%, the proposal is to quadruple the flow rate, reduce the particle diameter by a third, and increase the tube length by 50%. Without a specific model or empirical data, predicting the exact removal percentage is not feasible, as it would require a detailed understanding of mass transfer coefficients, reaction rates, and other parameters. However, in general, increasing the flow rate may enhance mass transfer, decreasing particle size often improves reaction surface area and thus absorption, and increasing the length of the bed allows more time for the chlorine to react with the absorbent. Each of these changes would likely contribute positively to the removal percentage, but without additional details or calculations, an exact value cannot be given.