Gas Filters In Air Purifiers
Jason Uvios
When we talk about air purifiers we generally restrict our
discussion to particulates suspended in air. But it is not just
about them. Air inside the home might have odors not
particularly pleasing to your olfactory senses. You need to
deal with them too. Good news is that there are air purifiers
which come with gas purifiers.
Generally carbon is used for gas filters. And it can be
anything from coal based filters to coconut shell based ones.
The carbon filters work by absorbing gas molecules in their
pores. So all the gases that produce those nasty odors are
trapped inside the pores and are not allowed to circulate in
the air. To remove the VOCs and SVOCs activated carbon filters
will be the best solution since they are of higher molecular
weight. But there are drawbacks with carbon filters. They are
not that functional when working in humid conditions. The water
is filled with large molecules of water vapor and they get
absorbed by the pores. Carbon also fails to deliver in case of
gases with lower molecular weights like formaldehyde, sulfur
and nitrogen dioxide. For such specialized cleaning there has
to be dedicated gas control ingredients like Chemisorbers. They
chemically remove gases from air. Chemisorbers actually react
both with the gas molecule and the water molecule and
subsequently produces odorless, harmless gases like carbon
dioxide. The well known Chemisorbers are alumina oxide, alumina
silicate, and potassium permanganate. A better gas filter would
be on which has more pores as it will mean more gas can be
absorbed by the filter. So it will absorb better and last
longer. It is only when all the pores are saturated that you
would need to change the filter.
A gas filter should be preceded by a pre-filter. Without the
pre-filter the gas filter will lose its efficiency
significantly. The micro pores in the gas filter, supposed to
absorb gases will be filled with air particulates. This will
mean that your filter will soon get saturated and it would
require a replacement.
To get the best air purifier for yourself is no mean task as
there are a variety of them and the technology behind them is
also different. The job of an air purifier is to clean the air
of all its pollutants and that would include allergens,
particulates, gases, etc. following is a comparison between the
three main kinds of air purifiers that are ruling the roost in
the purifier market.
Also larger the surface area of the filter, the better will be
the absorption of the gases.
Now we know, it is not enough to have particulate filters.
However good a HEPA air purifier you have, if it doesn't come
with a gas filter, you will still be breathing in polluted air
from your room.
About The Author: Jason Uvios writes about on Gas filters in
Air Purifiers to visit :- http://www.airpurifiermadness.info,
http://www.airpurifierstop.info and
http://www.airpurifiers2006.info
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