Question

Which of the following reactor is the most suitable for very high-pressure gas phase reaction?

• A. Batch reactor
• B. Tubular flow reactor
• C. CSTR
• D. Fluidised bed reactor

Hint:

Tubular reactors are preferred for high-pressure gas phase reactions because tubes can withstand high pressure more conveniently than large vessels.

Answer 1

The Correct Option is B

Very high-pressure gas phase reactions need reactors that can safely withstand high pressure. A tubular flow reactor is suitable for such reactions. A tube has a smaller diameter compared to a large vessel. For the same pressure, smaller diameter equipment is mechanically easier to design and fabricate. Therefore, tubular reactors are preferred for high-pressure gas reactions. They also provide continuous operation and good control of residence time. A batch reactor is not usually preferred for continuous high-pressure gas phase reactions. A CSTR has larger volume and is less convenient for very high-pressure service. A fluidised bed reactor is used for gas-solid catalytic reactions, but for very high-pressure gas phase reaction, tubular reactor is generally more suitable. Therefore, the correct answer is: \[ \text{Tubular flow reactor} \]