A gas-phase reaction is being carried out in a 5-cm-diameter tubular reactor that is 2 m in length. The velocity inside the pipe is 2 cm/s. As a very first approximation, the gas properties can be taken as those of air (kinematic viscosity=0.01 cm2/s), and the diffusivities of the reacting species are approximately 0.005 cm2/s.(a)How many tanks in series would you suggest to model this reactor?(b)If the second-order reaction A+B⎯⎯→ C+D is carried out for the case of equimolar feed,and with CA0=0.01 mol/dm3, what conversion can be expected at a temperature for which k=25 dm3/mol.s?(c)How would your answers to parts (a) and (b) change if the fluid velocity was reduced to 0.1 cm/s?Increased to 1 m/s?(d)How would your answers to parts (a) and (b) change if the superficial velocity was 4 cm/s through a packed bed of 0.2-cm-diameter spheres?(e)How would your answers to parts (a) to (d) change if the fluid was a liquid with properties similar to water instead of a gas, and the diffusivity was 5x10-6cm2/s?
A gas-phase reaction is being carried out in a 5-cm-diameter tubular reactor that is 2 m in length. The velocity inside the pipe is 2 cm/s. As a very first approximation, the gas properties can be taken as those of air (kinematic viscosity=0.01 cm2/s), and the diffusivities of the reacting species are approximately 0.005 cm2/s.
(a)How many tanks in series would you suggest to model this reactor?
(b)If the second-order reaction A+B⎯⎯→ C+D is carried out for the case of equimolar feed,and with CA0=0.01 mol/dm3, what conversion can be expected at a temperature for which k=25 dm3/mol.s?
(c)How would your answers to parts (a) and (b) change if the fluid velocity was reduced to 0.1 cm/s?Increased to 1 m/s?
(d)How would your answers to parts (a) and (b) change if the superficial velocity was 4 cm/s through a packed bed of 0.2-cm-diameter spheres?
(e)How would your answers to parts (a) to (d) change if the fluid was a liquid with properties similar to water instead of a gas, and the diffusivity was 5x10-6cm2/s?
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