Reaction pathway
A(g)+B(s)--->C(s)
System is non steady state cstr reactor. Gas A is continuously supply into the reactor, which contain solid B. There are water film on the surface of solid B. Rate of degradation of B is assumed first order with A and B
rB=kcAcB
Misses in the description. Rather a semibatch reactor, not CSTR. Is there a suspension in the tank? If so, you can try to use SCM, but beforehand you need information on gas solubility in liquid / water? and the product solubility in liquid / water?
The description may also indicate that it is a trickle bed reactor? "water film on the surface of solid" Regards,
Dear Dr Grzesik,
it is semi-batch, there are no suspension, only gas and solid. can it consider trickle bed reactor?
Well ...... You have previously written about a film of liquid on the surface of solid particles. And currently you write that only solid and gas. There is something I do not understand here. In the case of a trickle-bed reactor, the bed will be sprinkled with water, which may simultaneously dissolve the product C and remove it from the surface of the solid. In the case of gas, both co-current and counter-current flows are possible. Is such a layout, you mean - rather, it would not be a good idea (gradual decrease in particle size and gradual decrease in bed height). You can also imagine another set up: (1) The slurry flowing continuously through the tank. Mixing and dispersing of gas in the tank. Necessary recycling of solids, I suppose. (2) In the tank: solid. Water flow through the tank. Gas supplied to the tank. Another way is to run the process, and another its mathematical description - more difficult in the case of trickle-bed reactor and easier in (1). Taking into account only solid, (1) is a continuous system, but (2) and a trickle-bed reactor they are batch system.
Obviously, the reactor system and assumptions will determine the mathematical description. It up to you. Gas-solid system - SCM is sufficient - perheps the resistance at the interface might be taken into account. Gas-liquid-solid system - take into account mass transport resistance: gas bubble - water (bulk), ideal mixing in liquid phase (1),(2), gas - rather plag flow (2), solid - SCM. Regards,
This time briefly. Without knowing the properties of product C, it is only a guess of a correct solution. Regards,
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