matlab_quiz_q2(2).pdf

5/22/2018 Matlab_Quiz_Q2(2).pdf

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Quiz 2 Kinetics for methanol synthesis reaction

The kinetics for the CO2hydrogenation and reverse water-gas shift reactions formethanol synthesis are given by

= 1 1, 3 [ 1 + () + + ]

3

= [ 1 ,2 ( )]

1 + () + +

where the corresponding parameters are given in the following table:

Table 1 Kinetics and equilibrium parameters

= exp A B

ka 0.499 17197

kb 6.62 10-11 124119

kc 3453.38 -

kd 1.07 36696

ke 1.22 1010 -94765

= 10 A BKeq,1 3066 10.592

Keq,2 2073 2.029

WhereRg= 8.314 J/mol.K

Write a matlab m-file function to compute the rate of hydrogenation reaction rco2 and water

gas shift reaction rwgs for various values of partial pressures of carbon dioxide (pco2), carbon

monoxide (pco), hydrogen (ph2), water (ph2o), methanol (pch3oh) and temperature T. The

first line of your function should look as follows:

function [rco2,rwgs] = methanol_kinetics(T,pch3oh,pco,pco2,ph2,ph2o)

Use your function to compute rate of hydrogenation reaction and water gas shift reactionvalues for the following values of partial pressurepis and temperature T:


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T (K) pch3oh

(bar)

pco (bar) pco2 (bar) ph2 (bar) ph2o (bar)

525 0 1.5 0.5 8 0

525 0.101 1.454 0.485 7.935 0.025

525 0 15 5 80 0

525 15.98 5.42 4.99 72 1.61525 0 0.5 1.5 8 0

525 0.044 0.606 1.367 7.837 0.146

525 0 5 15 80 0

525 4.96 3.52 13.51 75.03 2.98

550 0 1.5 0.5 8 0

550 0.038 1.506 0.471 7.952 0.033

550 0 15 5 80 0

550 12.44 7.42 7.36 71.65 1.13

550 0 0.5 1.5 8 0

550 0.025 0.646 1.34 7.821 0.168550 0 5 15 80 0


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matlab_quiz_q2(2).pdf

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