Design a catalytic converter to convert an incoming stream that contains 18% CO so that the gas leaving the converter has a concentration of less than 0.4%. The flow rate is 120 liter per minute. The temperature is 380 C, and the absolute pressure is 1.2 atm. You must choose the number of channels, the channel diameter and the channel length. Practical limitations require that the length cannot exceed 40 cm. Use a diffusion coefficient for CO in air of 510^-5 ^2/. Use a Sherwood number of 10. Finally, use the Hagen-Poiseuille equation to calculate the pressure drop across a channel.