Simulation and Design of Etherification Reactor based on MATLAB/SIMULINK

Reporter:

Supervisor:

Lyu Wenjun

Xin Feng

2012/12/04

contents

1. The raw material and process flow diagram

2. The reactor

3. The next plans

2012/12/04

1. The raw materialComponent mass

fraction Component mass fraction Component mass

fraction

METHANOL 16.67 3-METHYL-1-BUTENE 0.493 2-METHYL-2-PENTENE 2.953

1-BUTENE 2.368 1-PENTENE 2.008 3-METHYL-1-PENTENE 4.451

CIS-2-BUTENE 1.763 CIS-2-PENTENE 3.532 3-METHYL-CIS-2-PENTENE 1.614

TRANS-2-BUTENE 1.822 TRANS-2-PENTENE 6.126 4-METHYL-CIS-2-PENTENE 0.42

N-BUTANE 0.495 2-METHYL-BUTANE 8.223 3-METHYL-TRANS-2-

PENTENE 2.982

ISOBUTANE 1.029 N-PENTANE 1.702 1-METHYLCYCLOPENTENE 2.417

CYCLOPENTENE 0.92 METHYL-ISOBUTYL-ETHER 0.347 3-METHYLCYCLOPENTENE 0.508

2-METHYL-1,3-BUTADIENE 0.143 1-HEXENE 1.869 2,3-DIMETHYL-BUTANE 1.973

2-PENTYNE 0.388 CIS-2-HEXENE 1.717 N-HEXANE 6.106

CYCLOPENTANE 0.18 TRANS-2-HEXENE 2.033 2-ETHYL-1-PENTENE 2.308

2-METHYL-1-BUTENE 3.67 METHYLCYCLOPE

NTANE 2.548 3-ETHYL-1-PENTENE 1.188

2-METHYL-2-BUTENE 8.462 2-METHYL-1-

PENTENE 7.352

C4a) Have C4 except active component ?b) Simplify the composition of raw

material ?c) Be beneficial to code.

2012/12/04

Process flow diagram

1

2

3

4

5

6

7

8

9

10原料 产品

R1 E1 T1 E2 R2一段反应器 换热器 精馏塔 换热器 二段反应器

MATLAB ASPEN+MATLAB

2012/12/04

2. The reactor -catalystSome characteristics of D005

Exchange capacity, mmol/g[H+] ≥5.2

Water content, % 50-58

Bulk density, g/ml 0.75-0.85

Wet true density, g/m 1.18-1.28

Particle diameter, mm 0.315-1.25

Pore diameter, nm 8-45

Surface area, m2/g 40-50

Porosity, ml/g 0.35-0.40

Maximum operation temperature, ℃ 120

The maximum operation temperature is 120℃

The catalyst (D005) is special for MTBE

C5+Methanol: D005II (A-35)

C6+Enthanol: A-15 (D005)

2012/12/04

The reactor model

Fixed-bed reactor

2

02i i

a id c dcD u rdZ dZ

00 2

0

,iiF Q

c uQ r

2'

2 20

1 1a i ib w i

D d F dFw r

Q dZ r dZ

𝜺=𝟏− 𝒃𝒖𝒍𝒌𝒅𝒆𝒏𝒔𝒊𝒕𝒚𝒘𝒆𝒕 𝒕𝒓𝒖𝒆 𝒅𝒆𝒏𝒔𝒊𝒕𝒚=𝟎 .𝟑𝟓

density

wet

Bulk density0.75-0.85

Wet true density

1.18-1.28

dry

True density1.6

swelling

2012/12/04

The reactor model Expanded reactora) Mathematical modelb) The velocity of flow

2 1650mf p p g gU d ( )g / ( )

20/e gmfgp UdRpmf

fluidization velocity, mm/s 4.3

The first reactor

Volume flow rate, m3/h 58.53 (19.28×3.2)Diameter, m 2.5

velocity, mm/s 3.3

The second reacor

Volume flow rate, m3/h 25.89Diameter, m 1.7

velocity, mm/s 3.2

2012/12/04

The influence factors

Conversion

(C5, C6) >90%?

Outlet temperature The

circulation ratio

Diameter and Da

Length

Inlet temperature

The ratio of

methanol to isomers

Who is fixed

a) Create a function about all the influence factors, then seek for the optimal value based on the constrain conditions.

b) Consider the factors individually, or several factors

The axial diffusion coefficient

Applicable conditions:Reynolds number for the particle Rep:10-3-103 Bed porosities:0.4-0.8The bed porosity is 0.35.

0 480 20 0 011pa

.p

ReD. . Re

2012/12/04

3.The next plans

Deal with the puzzle above.

Compile the code about the process.

Distillation column: azeotrope (C4, C5, C6)

THANK YOU !