Size: 3/8” x ¼”, 4 x 8, 8 x 40, 14 x 4,
various other screen sizes
HOW IT WORKS
The crystal structure of clinoptilolite contains
channel ways or windows that allow the passage
of air through the mineral. The channel ways or
“windows” also lead to “cages” or positions in
the crystal lattice. These cages will capture
and hold certain size cations such as ammonium.
In a typical zeolite filter air is passed
through a bed of zeolite and it retains the
impurities. Depending on the impurities it can
be cleaned or regenerated by certain methods
that may include heating, washing with a saline
solution, exposing to sunlight, etc. These
filters can consist of a layer of zeolite held
between screen layers. Alternatively, they can
be non-woven polyester impregnated with finely
In other systems, the zeolite in the air filter
is surface modified, and is called a “surface
modified zeolite” (SMZ). The modifier can be a
quaternary amine, oxidant such as potassium
permanganate, or various other substances. Some
of them can be regenerated and others such as
potassium permanganate are consumed.
In another system commonly known as a
“biofilter” the gas to be purified is passed
through a bed of zeolite that contains various
bacteria. The temperature, moisture, and
nutrients must be controlled. Here the gas is
consumed by the bacteria.
Coal generating plants to
To concentrate SO2
gas streams to produce liquefied
SO2, elemental S, sulfuric acid,
or ammonium sulfate.
CAFOs, farms, rendering
plants, sewage treatment plants, waste-water
treatment plants. To remove odoriferous
ammonia gas, hydrogen sulfide.
Oil refineries. To remove
hydrogen sulfide gas, SO2, etc.
For the removal of volatile
organic carbon (VOC) after being modified to