1. Influence of the gas-liquid mass transfer on molecular weight and chemical composition distributions of polymer in slurry polymerization reactors
ADRIANO G. FISCH
(10/4/2017)

2. Ch.01
INTRODUCTION

3. Surface-aeration mode
INTRODUCTION 01
Chapter
Slurry polymerization technology
Multiphase process
Solid, liquid and gas phases
Stirred tank
Loop-tubular
Gas dissolution
in liquid phase
Bubbling mode
Surface-aeration mode

4. 01 Mass transfer scheme Slurry reactor
INTRODUCTION 01
Chapter
Mass transfer scheme
Slurry reactor
Bubbling mode of gas dissolution
(e.g., industrial and pilot plants)
Gin
Surface-aeration mode
(e.g., lab reactors)

5. Slurry polymerization technology
INTRODUCTION 01
Chapter
Polymer structure (MWD and CCD)
Catalyst
nature
Slurry polymerization technology
Gas dissolution mode
Reactor conditions

6. INTRODUCTION 01
Chapter
RESEARCH QUESTION
How the gas dissolution mode affects the chemical structure of the polymer?
OBJECTIVE
To study the mass transfer mechanism and equilibrium concentration of gases in slurry polymerization using bubbling and surface-aeration mode of gas dissolution

7. Ch.02
MODELING

8. MODELING 02
Chapter
Dynamic model implemented in MatLab

9. Ch.03
RESULTS AND DISCUSSION

10. ETHYLENE PARTIAL PRESSURE AND H2/C2
RESULTS AND DISCUSSION 03
Chapter
ETHYLENE PARTIAL PRESSURE AND H2/C2
KB2L x ppC2 x H2/C2
Conversions
XC2= 0.998
XH2= 0.348
KG2L=10-3 s-1

11. ETHYLENE PARTIAL PRESSURE AND C4/C2
RESULTS AND DISCUSSION 03
Chapter
ETHYLENE PARTIAL PRESSURE AND C4/C2
KB2L x ppC2 x C4/C2
Conversions
XC2= 0.998
XC4= 0.982
KG2L=10-3 s-1

12. BUBBLING  SURFACE AERATION
RESULTS AND DISCUSSION 03
Chapter
BUBBLING  SURFACE AERATION
Partial pressure of ethylene is low
Partial pressure of ethylene is high
Gin

13. High partial pressures Concentrations are similar
RESULTS AND DISCUSSION 03
Chapter
EQUILIBRIUM
ethylene
1-butene
hydrogen
Surface aeration
High partial pressures
Concentrations are similar
Bubbling
Low partial pressures

14. RESULTS AND DISCUSSION03
Chapter

15. RESULTS AND DISCUSSION03
Chapter

16. CASCADE POLYMERIZATION PROCESS
RESULTS AND DISCUSSION 03
Chapter
CASCADE POLYMERIZATION PROCESS R1
Good bubbling:
KG2L= 10-3 s-1
KB2L= 1 s-1 R2
Poor bubbling:
KG2L= 10-3 s-1
KB2L= 10-2 s-1
MWD and CCD of POLYMER
HOMOPOLYMER
COPOLYMER

17. 03 + H2 flow rate + H2 flow rate + C4 flow rate
RESULTS AND DISCUSSION 03
Chapter
POLYMER STRUCTURE: MWD AND CCD R1 R2
+ H2 flow rate
+ C4 flow rate
+ H2 flow rate
Maintaining catalyst activity and ethylene partial pressure
(same catalyst flow rate)

18. POLYMER STRUCTURE: MWD AND CCD
RESULTS AND DISCUSSION 03
Chapter
POLYMER STRUCTURE: MWD AND CCD R2
+ H2 flow rate
+ C4 flow rate
CC2= 11 mol.m-3
CH2= 0.83 mol.m-3
CC4= 22.9 mol.m-3
CC2= 11 mol.m-3
CH2= 0.15 mol.m-3
CC4= 6.5 mol.m-3

19. POLYMER STRUCTURE: MWD AND CCD
RESULTS AND DISCUSSION 03
Chapter
POLYMER STRUCTURE: MWD AND CCD
Good bubbling:
KG2L= 10-3 s-1
KB2L= 1 s-1
Poor bubbling:
KG2L= 10-3 s-1
KB2L= 10-2 s-1
Maintain the reactant concentration

20. POLYMER PROPERTIES: MWD AND CCD
RESULTS AND DISCUSSION 03
Chapter
POLYMER PROPERTIES: MWD AND CCD R2
Good bubbling
ppC2= bar
H2/C2=
C4/C2=
Poor bubbling
ppC2= bar
H2/C2=
C4/C2=

21. 03 To maintain the reactant concentration !
RESULTS AND DISCUSSION 03
Chapter
RELATIONSHIP
To maintain the reactant concentration !
To maintain the POLYMER STRUCTURE !

22. Ch.04
CONCLUSIONS

23. 04 1. MASS TRANSFER INFLUENCES MWD AND CCD;
CONCLUSIONS 04
Chapter
1. MASS TRANSFER INFLUENCES MWD AND CCD;
2. H2/C2 AND C4/C2 USING BUBBLING MODE FOR GAS DISSOLUTION ARE LOWER THAN THOSE USING SURFACE-AERATION MODE;
3. FOR MOST POLYMERIZATION PROCESS CONDITIONS, THE SCALING LAW BETWEEN DIFFERENT REACTORS CONCERNING MASS TRANSFER IS THE CONCENTRATION IN SLURRY PHASE;
FUTURE WORKS:
HOW THE HEAT TRANSFER INFLUENCES MWD AND CCD;
EXTENTION OF MODEL CONSIDERING MULTISITE CATALYSTS;

24. Thank you!
Porto Alegre
October, 4-5, 2017