the influence of the binder on the product and application … · 2019-05-21 · o spray...
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The Influence of the binder on
the Product and Application
Related Properties of Zeolite
Molecular Sieves
Dr. Kristin Gleichmann
and
Dr.-Ing. Jens Zimmermann
Leipzig, 14 May 2019
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• Introduction
• Manufacturing of zeolite molecular sieves
– Binder containing zeolite granulates
– Binderfree zeolite granulates
• Lab-scale tests for determination zeolite properties
– Behavior under applied stress
– Breakthrough properties
• Summary
Outline
2
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Introduction
3
SeparationsReactors
J. Pendergast, DOW Chemicals
Separation techniques: Distillation, Drying, Extraction, Adsorption…
Separation substances are a main task in many industries
During production attention must be paid to defined product characteristics
LHC-8 Freeport, TX
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Drying /
Calcination (Activation)Packaging
Drums, Big Bags
Quality Control,
Storage,
Shipping
Shaping
Raw Materials(Water Glass,
Sodium Aluminate,
Sodium Hydroxide, ...)
Filtration Filtration/
Drying
Gel Precip-
itationModification(Ion Exchange,
Dealumination)
Crystallization(Atmospherically,
Autoclave)
Binder MaterialManufacturing Process
o agglomeration
granulation
o spray granulation or
o extrusion
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• Mineral binders and/or synthetic binders
• Binder material type and amount influences
- bulk density
- strength
- attrition
- adsorption kinetics
- behavior under harsh conditions (temperature/
concentration shocks)
Binder Material
5
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Synthetic Binder Material
- Silica
- Water glass
- …
Mineral Binder Material, e.g.
Binder Material
6
[1] B. Ullrich, M. Dietze, F. Haubrich, Journal of Central European Geology, 56/2, 2010, 115-125
[1]
Attapulgite BentoniteSepiolite Kaolinite
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7
Binder Containing Zeolite Beads
- Binder containing zeolite NaMSX
(zeolite 13X = Si/Al = 1.25 /
zeolite NaMSX = Si/Al ~ 1.17)
- Attapulgite bonded
binder ‚net‘
Zeolite crystals
- Mechanical stability through embedding
of zeolite crystals into the binder net
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8
Binder
Conversion
Drying /
Calcination (Activation)Packaging
Drums, Big Bags
Quality Control,
Storage,
Shipping
Shaping
Raw Materials(Water Glass,
Sodium Aluminate,
Sodium Hydroxide, ...)
Filtration Filtration/
Drying
Gel Precip-
itationModification(Ion Exchange,
Dealumination)
Crystallization(Atmospherically,
Autoclave)
Mineral
Binder /
Synthetic
Binder /
additives
Manufacturing Process
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Binderfree Zeolite Beads
9
- Binder-free zeolite NaMSX
- Mechanical stability through intergrowth
of zeolite particles
- Adsorption capacity higher than for binder
containing zeolites (similar to pure zeolite
powder)
- Faster kinetics through better access to the
interior of the bead
- BUT: Due to the higher capacity and
faster adsorption kinetics larger adsorption
heat amount leads to destruction of bead
shape (only in case of liquid water)
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Lab-scale tests for determination
of zeolite properties
10
main tasks of an adsorbent:
- selectivity
- high capacity
- good kinetics
- process stability
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Lab-scale tests for determination
of zeolite properties
11
process stability:
- thermal stress,
- spill or carry over resistance,
- binder leaching resistance
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Lab-scale tests for determination
of zeolite properties
12
Behavior under applied stress:
- Cyclic-Burst-Unit
- Adsorption-Desorption-Test-Device
- Breakthrough-Unit
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Lab-scale tests for determination
of zeolite properties
13
Cyclic-Burst-Unit:
- a full cycle contains two steps:
- Heating out the material at 300 °C,
- Drop the activated and still hot material into water
- Only applicable for binder containing granules
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Lab-scale tests for determination
of zeolite properties
15
Adsorption-Desorption-Test-Device
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Lab-scale tests for determination
of zeolite properties
16
Breakthrough properties
Test-Conditions:
- Temperature: RT
- Pressure: 5 bar a,
- Superficial velocity: approx. 0,09 m/s
- CO2-Concentration: 445 ppm
- Constant bulk height of 96 cm
QIRC
PIRC
TIC
TIC
TIC
TIC
MFC
MFC
MFC
HT
X
Ad
so
rbe
r
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Lab-scale tests for determination
of zeolite properties
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0
5
10
15
20
25
30
35
standard Binder-system 1 Binder-system 2 Binder-system 3
Cru
sh
Str
en
gth
[N
]
Type
Cyclic-Burst-Test
original
2. cycle
4. cycle
6. cycle
8. cycle
10. cycle
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0
5
10
15
20
25
30
35
standard Binder-system 1 Binder-system 2 Binder-system 3
Cru
sh
Str
en
gth
[N
]
Type
Adsorption-Desorption-Test
before
after
Lab-scale tests for determination
of zeolite properties
18
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Lab-scale tests for determination
of zeolite properties
19
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
850 950 1050 1150
rela
tive
Co
nc
en
tra
tio
n[c
/c0]
Time [min]
CO2 - Breakthroughcurves on different CWK-Materials
standard #1
standard #2
standard #3
BF-system #1
BF-system #2
BF-system #3
Binder containing Binder free
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Lab-scale tests for determination
of zeolite properties
20
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
850 950 1050 1150
rela
tive
Co
nc
en
tra
tio
n[c
/c0]
Time [min]
CO2 - Breakthroughcurves on different CWK-Materials
standard #1
standard #2
standard #3
BF-system #1
BF-system #2
BF-system #3
Binder-system 1 #1
Binder-system 1 #2
Binder-system 1 #3
Binder containing Binder-system 1 Binder free
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Lab-scale tests for determination
of zeolite properties
21
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
850 950 1050 1150
rela
tive
Co
nc
en
tra
tio
n[c
/c0]
Time [min]
CO2 - Breakthroughcurves on different CWK-Materials
standard #1
standard #2
standard #3
BF-system #1
BF-system #2
BF-system #3
Binder-system 1 #1
Binder-system 1 #2
Binder-system 1 #3
Binder-system 2 #2
Binder-system 2 #3
Binder-system 2 #4
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Lab-scale tests for determination
of zeolite properties
22
0,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
850 950 1050 1150
rela
tive
Co
nc
en
tra
tio
n[c
/c0]
Time [min]
CO2 - Breakthroughcurves on different CWK-Materials
standard #1
standard #2
standard #3
BF-system #1
BF-system #2
BF-system #3
Binder-system 1 #1
Binder-system 1 #2
Binder-system 1 #3
Binder-system 2 #2
Binder-system 2 #3
Binder-system 2 #4
Binder-system 3 #1
Binder-system 3 #4
Binder-system 3 #5
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Summary
23
Investigated several new binder-systems
Identified a systems that fits well to the well known standard
material
- mechanical and application stress tests fulfilled
- further investigations in breakthrough behavior needed
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25
0,0
0,5
1,0
1,5
2,0
2,5
3,0
3,5
4,0
4,5
standard-system binder-system 1 binder-system 2 binder-system 3 BF-system
sp
ecif
ic C
O2
-Cap
acit
y [
gra
mm
CO
2 p
er
100 g
ram
m M
S]
Type of material
Specific CO2-Capacity of different Binder-Systems at the Beginning and the End of a CO2-Breakthrough
start
end