Dynamic Adsorbents DrysphereTM
activated alumina and desiccant offers the best
drying and regeneration properties for industrial
liquids and gases on the market today.
The ONLY activated alumina
on the market that can extract and adsorb 36% of its
own weight in water, which is 3 times more than the
standard alumina product offered by competitors, 20%
more than silica and 32% more than Drierite
DrysphereTM
is available as desiccant material and in refillable
and disposable gas cartridges
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Drysphere™ Online
Dynamic Adsorbents, Inc.’s
Drysphere™ Alumina Answers Natural Gas Hydrate
Problem for Oil and Gas Drilling Companies
DrysphereTM
is a unique product line offered by Dynamic
Adsorbents that provides a superior solution for gas
and industrial liquid dehydration. It contains a
dust free, spherical activated alumina manufactured
as specialized desiccant agents that works through
the process of adsorption and is designed for the
removal of water, oil and other heavy hydrocarbons
from inert gases including nitrogen, helium and
argon. The superior adsorption is achieved by the
hydrophilic characteristics, the design of the microporosity and the extent of the achieved surface
area.
Dynamic Adsorbents has built
upon excellence in design and manufacturing by
creating superior uniform alumina spheres demanded
for the drying of industrial liquids and gases.
These spheres offer superior drying and regeneration
properties and are known as DrysphereTM.
These proprietary alumina spheres are manufactured
as specialized desiccant agents.
DrysphereTM
is designed to increase surface area by containing
multiple channels and pores that dramatically
increase the available surface area for physical and
chemical interaction. It is provided inside the
DrysphereTM Gas Filter as the active drying
agent.
Activated alumina is an aluminum
oxide that is highly porous and exhibits tremendous
surface area. Activated Alumina is resistant to
thermal stock and abrasion and will not shrink,
swell, soften nor disintegrate when immersed in
water.
Surface area are in the range 345-415 . Because it
has a higher capacity for water than Silica Gel at
elevated temperatures it is mainly used as a
desiccant for warm gases including air. These are
designed for the removal of water, oil and other
heavy hydrocarbons from inert gases including
nitrogen, helium and argon.
What are the Features and Benefits of
Drysphere?TM
Dynamic Adsorbents
DrysphereTM is the ONLY activated
alumina on the market that can extract and
adsorb 36% of its own weight in water, which is
3 times more than the standard alumina product
offered by competitors, 20% more than silica and
32% more than DrieriteTM.
No other commercial media can remove as much
water. It is the superior desiccant agent in the
marketplace for the drying of industrial liquids
and gases.
Adsorption capacity is defined as
the accumulation of the solute molecules at the
surface of a solid. This capacity is directly
proportional to the area of the surface exposed and
is depending on the solute partial pressure and the
temperature.
|
Kinetic Properties |
|
30 minute exposure to 97% |
|
|
Weight % Gain |
|
DrysphereTM |
3.5% |
| P2O5 |
3.0% |
| CaSO4 |
2.6% |
| Silica
Gel |
2.3% |
| Alumina |
1.6% |
|
Kinetic
Exposure Tests |
|
|
Relative Humidity |
| Static @
11% |
12 |
|
Adsorption @ 58% |
22 |
| Weight @
97% |
36 |
|
Physical Properties |
| Abrasion
Loss (wt%) |
0.1 |
| Crush
Strength (lb) |
30 |
| Bulk
Density (lbs./ft3) |
48 |
Other features and benefits
include:
-
High Capacity:
Absorbs 36% of its own weight, three times more
than "standard" alumina, 20% more than silica
and 32% more than Drierite.
-
Dust free: Provided
in a convenient dry, dust free configuration
making it suitable for lab/pilot/process
preparation of dust-free, dry streams. They will not contaminate gas/liquid streams
with particulates. The same material can be
scaled up from lab and pilot to full industrial
process applications.
-
Spherical alumina
particles: Easy to pack, very permeable and
convenient to use.
-
Drier samples:
Obtains drier samples, faster, for a longer
period of time, reducing downtime in the
industrial production of gases and liquids.
-
Customized sizing:
Uniform alumina spheres are sized according to
your industrial needs. 1/8" and 1/16" spheres
)sized from, 6mm, 3 mm, or 1-3mm.)
-
Wide scope:
-
Dry gases and liquids: Use
directly in HPLC solvent reservoir to keep
solvent dry for constant baseline
-
Gases: CO2, acelylene, air,
argon, ethylene, helium, hydrogen, N2, O2, etc.
-
Liquids: Benzene, VVI,
ethylacetate, hexane, oil, pentane, transformer
oils, sylene, etc
-
Dehydrate acidic gases and
liquids without softening or breakage.
-
High crush strength:
The advantage of having high crush strength is
that this allows for rapid pneumatic loading,
and in so doing allows the desiccant to
dehydrate acid containing gases and liquids such
as C02 for long operating life. DrysphereTM
is manufactured with very high resistance to
attrition and crushing. These goals are attained
by the specifications of the manufacturing
process and the spherical shape of the beads.
-
Acid Removal:
Transformer oils, lubricating oils and
refrigerants form degradation acids.
DrysphereTM removes these acids
during use. In the manufacture of chlorinated
and/or fluorinated hydrocarbons, removal of
these residual halides and water is essential
for non corrosive final products.
-
Adsorptive Properties:
DrysphereTM cleans organics while
it dries and preferentially adsorb high polarity
impurities.
-
Packing: Easy to pack
and very convenient to use. Offered in both refillable
and disposable gas cartridges.
-
Contains an indicator that
changes in color from orange to green when the
filter is fully saturated, providing notice it
is time to refill the cartridge.
-
Each unit is tested at 125 psi
and to withstand temperatures of up to 100o F.
Applications
DrysphereTM is
indicated for use in the drying of industrial gases
and liquids. Demonstrated industrial applications
include the drying of liquids such as benzene, oils,
transformer oils and xylene as well as elemental
gases such as argon, helium, hydrogen and oxygen. It
has a special indication in the purification of
compressed air and C02.
DrysphereTM is
the superior desiccant for the following industrial
applications:
-
Purification of gases and
liquids. Water removal is necessary for
efficient processing, storage and transportation
of fluids
-
Drying of organic liquids
such as LPG, butane, steam cracked liquid,
aromatics, cyclohexane, gasoline, chloro and
fluoro hydrocarbons and aromatic solvents
-
Drying of air and gases
such as steam cracked gases, catalytic reforming
recycle gas, natural gas and carbon dioxide
-
Desiccants which can be
used in compressed air dryers include activated
alumina, silica gel and molecular sieves.
Compressed air dryers utilize activated alumina
as desiccant agents to remove moisture from
compressed air. The compressed air first passes
through an aftercooler, air receiver and
coalescing filter before reaching the desiccant
drying site. At each point water is removed from
the compressed air via drain valves. The
compressed air enters the compressed air dryer
and comes in contact with the desiccant in the
desiccant chamber. The desiccant removes the
moisture from the compressed air via adsorption.
Once down steam of the compressed air dryer the
compressed air’s dew point is generally – 40 F.
(The dew point is the measure of the amount of
water contained in the air). Particle filters
downstream of the desiccant dryer capture any
desiccant fines and dust before the compressed
air enters production.
-
Catalyst for Claus
conversion in sub dew point processes in the
purification and drying of compressed air
-
Natural gas in production
and compression plants – liquid petroleum
gas, liquid nitrogen gas
-
Drying agent for
aromatics, naphtha cuts and cracked gas in
petrochemical industries
Substances commonly dried with DrysphereTM
include:
Gases
-
Acetylene Ethane
Hydrogen chloride Oxygen
-
Air Ethylene Hydrogen
sulfide Propane
-
Ammonia Furnace Gas
Methane Propylene
-
Carbon Dioxide Helium
Natural Gas Refrigerants
-
Chlorine Hydrogen
Nitrogen Sulfur dioxide
Liquids
-
Benzene Ethyl acetate
Lubricating oils Refrigerants
-
Butane Gasolines Naptha
Styrene
-
Butene Heptane
Nitrobenzene Toluene
-
Butyl acetate Hexane
Pentane Transformer oil
-
Carbon tetrachloride
Hydraulic oils Pipeline products Vegetable
oil
-
Chlorobenzene Jet fuel
Propane Xylene
-
Cyclohexane Kerosene
Propylene
-
Drying
of hydrogen, oxygen, nitrogen and carbon
dioxide: Uniform ball size (spheres of
consistently standard sizing) are essential in
high pressure gas dehydration where it is
important to minimize pressure drop, such as in
a packed bed. DAI's DrysphereTM activated alumina, being
carefully quality controlled, provides low
pressure drops and in so doing minimizes
channeling while liquids and gases travel
through the packed bed adsorbent chamber.
Uniform sphere design maximizes the ability to
use the entire packed adsorbent bed to maximum
efficiency
-
Purification of gases and
liquids (removal of metallic traces, BF3, TBC,
HCl, HF and fluorinated hydrocarbons).
-
Catalyst for Claus
conversion in sub dew point processes.
-
Air drying (PSA, TSA)
-
Instrument air, supersonic
wind tunnel, compressed air
-
Gas drying Air separation
plants, inert and rare gases, Hydrogen, oxygen,
nitrogen, CO2.
-
Natural gas in production
and compression plants, LPG, LNG.
-
Aromatics, naphtha cuts and
cracked gas.
DrysphereTM Gas
Filters
 |
 |
|
Refillable DrysphereTM
Cartridge |
Disposable DrysphereTM
Cartridge |
The DrysphereTM Gas
filter (dryer and desiccant) is designed to remove
water, oil and other heavy hydrocarbons form inert
carrier gases such as nitrogen, helium or argon. A
mixture of DrysphereTM, and an indicating
desiccant are contained within the transparent
Dynamic Adsorbent' canister. The DrysphereTM
desiccant will change color from orange to green
with the absorption of moisture. The color change is
readily observed through the cartridge body
indicating a need for refilling.
The filters are offered only in
the 200 cc capacity with the inline configuration,
and is approximately 7" long by 2" in diameter. Both
of these units are designed for a nominal flow rate
of 5 liters per minute.
The DrysphereTM
cartridge in the refillable filters is easily
refilled by removing the exhausted filler mixture
and replacing it with the Drysphere Refill Kit, an
inexpensive and easy-to-use premixed refill of new
materials.
Using DrysphereTM
Example for the Industrial Usage of DrysphereTM
The following example is
provided for the use of DrysphereTM
for petrochemical purification
Halogenated butyl rubbers were
essential for the development of the tubeless tire.
In the manufacture of halogenated butyl rubber
residual amounts of isoprene and isobutylene monomer
are also halogenated. When the halogenation is
carried out in a solvent, the organic halides become
concentrated in the solvent and ultimately the
concentration of organic halides in the final rubber
product increases. One particular halide produced
during the manufacture is MDBCP (methyl dibromo
chloro propane) which is highly toxic, potentially
carcinogenic and causes male sterility. This can be
removed by contacting the hydrocarbon solvent with
an activated alumina such as DrysphereTM.
While a wide variety of
compounds will remove halides to some extent from a
hydrocarbon stream activated alumina has been
demonstrated to be the most effective adsorption
medium. The hydrocarbon stream is pumped through a
vertical bed of activated alumina. Halides can be
removed from the liquid hydrocarbon stream in a
single pass through a bed of alumina at a flow rate
of one volume of hydrocarbon to one volume of
alumina per hour. Increasing the temperature speeds
up the rate of halide removal.
A superior method for removing
the halides from process streams is by gas phase
adsorption in a packed bed of activated alumina
DrysphereTM. The adsorption is
carried out at about – 50 C to about 20 C. The
adsorbed halides are stripped from the adsorption
stage at about 100 – 400 C.
Another example for using
DrysphereTM lies in the production of
methyl chloride and methylene chloride by the oxy
chlorination of methane. The chlorides are recovered
by gas phase adsorption in beds of activated
alumina.
Under the proper operating
conditions, the pore size distributions and surface
chemistry of activated alumina is ideal for the
adsorption of hydrocarbons. Dynamic Adsorbents, Inc.
can help you in designing the ideal desiccant
chamber design and surface chemistry characteristics
for your hydrocarbon requirements.
To address industrial needs
Dynamic Adsorbents has developed DrysphereTM
which is a novel, dust free, spherical activated
alumina manufactured and designed to optimize
desiccant performance.
What are the Sizing Recommendations for
Alumina Sphere?
Spheres measuring 4-6 mm are
recommended for vapor phase dehydration applications
where one desires high water adsorptive capacity yet
pressure drop must be kept to a minimum
Spheres smaller than 3 mm are
recommended for liquid dehydration and other mass
transfer limited adsorption applications
How can one tell when the cartridge is saturated
with liquid?
Each unit has a built-in
indicator system that accurately reflects the degree
of liquid adsorption.
