Natural gas dehydration entails removing vapor from natural
gas. This procedure has been proven vital in gas transmission. This is because
it assists to minimize corrosion while limiting the formation of gas hydrates.
Also, without dehydration, water in its liquid form would otherwise condense in
pipelines. Later, it would accumulate at the low points of the line. Its result
is reduction in flow capacity. Fortunately, the following three methods have
been developed to aid in dehydration.
To begin with, you might choose direct cooling in the natural gas dehydration process. This
is possible because the saturated water vapor is decreased with more pressure
or lower temperatures. Ideally, the gases are compressed then cooled at the
lowest temperatures that the gases might thereafter be exposed to.
Absorption of water is only useful in natural gas dehydration process that involves glycols. In this
case, you will rely on a liquid desiccant to eliminate the water gas. An ideal
liquid for this procedure must be non-toxic, non-corrosive, with high
absorption efficiency not forgetting that it should be easily and economically
regenerated.
Adsorption of the water using a solid is the last option
that you can select from for natural gas
dehydration process. Appropriate solid desiccants must be used severally
and be easily degenerated. Note that you can select from the physical and
chemical surfaces. Under a physical surface, you should have a large area with
high rate of mass transfer and low gas’ resistance. The chemical surface on the
other hand should be inert, non-corrosive and cheap to say the least.
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