Question

3. Mass transfer schemes. Based on the mass transfer of a gas (A) to a porous catalyst, obtain the CA concentration profile, following the inindicated procedure. a) Perform a molar balance in zone ?. b) State and write down the hypotheses for simplify the problem. c) Simplify the general Fick equation. d) Establish the boundary conditions. e) Obtain the concentration profile. 

          3. Mass transfer schemes. Based on the mass transfer of a gas (A) to
a porous catalyst, obtain the CA concentration profile, following the
inindicated procedure.

a) Perform a molar balance in zone ?.
b) State and write down the hypotheses for
simplify the problem.
c) Simplify the general Fick equation.
d) Establish the boundary conditions.
e) Obtain the concentration profile.
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3. Mass transfer schemes. Based on the mass transfer of a gas (A) to a porous catalyst, obtain the CA concentration profile, following the inindicated procedure. a) Perform a molar balance in zone ?. b) State and write down the hypotheses for simplify the problem. c) Simplify the general Fick equation. d) Establish the boundary conditions. e) Obtain the concentration profile.

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Chemistry: Structure and Properties
Chemistry: Structure and Properties
Nivaldo Tro 2nd Edition
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3. Mass transfer schemes. Based on the mass transfer of a gas (A) to a porous catalyst, obtain the CA concentration profile, following the indicated procedure. a) Perform a molar balance in zone 8. b) State and write down the hypotheses to simplify the problem. c) Simplify the general Fick equation. d) Establish the boundary conditions. e) Obtain the concentration profile. Ci > C.
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Transcript

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00:01 Let's assume z is equal to a in this solution.
00:07 Now, above problem can be solved using those shell balance, the mass of or molar rate of transfer.
00:16 Consider the given system.
00:17 Now, firstly we have to take some assumptions.
00:22 So, assumptions we will take.
00:27 First of the assumption is curvature of catalyst neglected.
00:40 Diffusion is considered unidirectional in specially z direction.
00:54 Now, second assumption is velocity vector is considered as a parallel to surface.
01:17 There is no mass transfer due to the conversion in z direction.
01:22 Now, third assumption is diffusive only diffusive mass transfer in present in z direction and fourth assumption is steady state diffusion.
01:49 These are the four assumptions...
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