Neraca massa reaksi orde 2 pada reaktor fixed bed multi tube

Neraca massa reaksi orde 2 pada reaktor fixed bed multi tube

Neraca massa reaksi orde 2 pada reaktor fixed bed multi tube :

Reaksi 1 CO + 2H2 → CH3OH
Reaksi 2 CO2 + 3H2 → CH3OH + H20

Konversi reaksi 1 = 99%
Konversi reaksi 2 = 68.75%

Komposisi gas sintetis (Kirk Ortmer)

Komposisi BM % berat masuk reaktor Kg/J
H2 2 74 148
CO 28 15 420
CO2 44 8 352
CH4 16 3 48
H2O 18 0 0
CH3OH 32 0 0
Total 100 968

Reaksi 1 C O + 2H2 ---> CH3OH
A B C

Konversi 1 = X1

Co sisa = n.Ao.(1 - X1)
= 0.15Kg mol/J
= 4.2Kg/j (*BM)

H2 bereaksi = 2nAo.X1
= 29.7Kg mol/J
= 59.4Kg/j (*BM)

CH3OH (tbtk) = n.Ao.X1
= 14.85 Kg mol/J
= 475.2 Kg/j (*BM)

Reaksi 2 C O 2 + 3 H 2 ---->CH3OH + H20
D B C E
Konversi 2 = X2

Co2 sisa = n.Do.(1 - X2)
= 2.5 Kg mol/J
= 110 Kg/j (*BM)
H2 bereaksi = 3.nDo. X2
=16.5 Kg mol/J
= 33 Kg/j (*BM)
CH3OH (tbtk) = n.Do.X2
= 5.5 Kg mol/J
= 176 Kg/j (*BM)
H20 (tbtk) = n.Do.X2
= 5.5 Kg mol/J
= 99 Kg/j (*BM)

Total H2 Yang bereaksi = H2 reaksi1+ H2 reaksi2
= 29.7 16.5
= 46.2 Kg mol/jam

H2 sisa = H2 masuk - ( H2 reaksi1 H2 reaksi 2)
= 74 - ( 29,7 19,8 )
= 27.8 Kg mol/J
= 55.6 Kg/j (*BM)

Total CH3OH = CH3OH (r 1) + CH3OH (r 2)
= 14.85 5.5
= 20.35 Kg mol/J
= 651.2 Kg/j (*BM)

Komposisi keluar reaktor

Komposisi BM %Berat Keluar reaktor Kg/J
H2 2 27.8 55.6
CO 28 0.15 4.2
CO2 44 2.5 110
CH4 16 3 48
CH3OH 32 20.35 651.2
H2O 18 5.5 99
Total 968

% CH3OH yang dihasilkan = 86.8