Zero-Air Generator may be defined as filtered
ambient air which contains total hydrocarbons as less than 0.1 parts per
million or PPM. Here hydrocarbon content actually means methane gas (CH4).
There are various air generators in the market producing zero air gas which
produces zero air out of compressed air after passing through catalytic
oxidation. This zero air gas is required to fulfil so many purposes in
industrial applications.
ZA series zero air generators produce
zero air gas which is equivalent to UHP air cylinders. UHP gas means instrument
grade pure gas which is used for calibration gas applications. These generators
may be available with or without air compressor internally. The incoming air
after getting compressed internally, air is heated at 400 degrees Celsius and
is made to pass through the catalyst chamber where platinum is used as a catalyst.
Whatever free carbons available in the air are made to oxidize to create carbon dioxide and free hydrogen atoms are combined with
oxygen to form water. In this way by oxidation the free carbon particles and
the free hydrogen atoms are eliminated from the air supply.
The purified air is passed through
the cooling system and cooled down at the temperature for external uses. The
zero generators in Z series hold unique features. The generator is producing
purified zero air gas and the generator is compact in design. It provides the
supply of pure zero air gas in consistent mode. You can install the generator
in an easy way. No difficulties will arise in installing the system. The
generators require low maintenance and this is very much cost effective. This
type of generators increases the productivity.
The zero air gas is used to GC-FIDs
as an oxidant supply and for the process of analytical instruments. As the zero
air gas contains a minimum number of hydrocarbons, it can create a very good
baseline in compared to the fuel-air which are used as conventional sources of
air. Zero air gas may be used in environmental equipment for calibration
purpose. The zero gas is also in chromatography in flame ionization detectors.
The huge areas of applications enhance the necessity of the production of zero
air gas.
Zero-air gas generators are also used
for total hydrocarbon analyzers. Composition of zero gas is 20.5 % of oxygen
with 77% of nitrogen. Hydrocarbons are in traces as 0.05 parts per million or
PPM. The zero gas is used in wide commercial applications. Pressure of the gas
is kept near about at 13700 K Pa. Properties of the zero gas is odourless, colourless
with nontoxic effect. Type of gas is specialty gas. The zero gas is actually
gas in compressed mode with purified air. The zero gas also supports
combustion.
Source: http://www.articleslash.net/News/Science/704019__Zero-Air-Gas-Generators-and-its-Product-Feature.html
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