Figure 78 shows the outline of the absorption process in which the gas is in contact with a counter in light oil through an absorber tower. The contact in the tower can be through food or packaging. The gas should cool to the tower to report an improved removal of the components of interest. The oil used to make the removal of the tower comes from the top and is known as oil poor, out of the tower, the bottom has removed the components and is known as gas oil rich. The gas that comes out of the tower is basically absorber and is known as methane gas. The rich oil that comes from the absorber column becomes a stabilization in this case, frees the oil-rich methane and ethane that was unable to leave the absorber, in this case is not seeking ethane. Ethane when needed, the oil becomes a rich desmetanizadora and the fluid that comes out of this becomes a desetanizadora. Reflux in desentanizadora is to improve the separation of methane and ethane.
Table 26 -. Specifications of liquefied petroleum gas (1)
PRODUCT
Feature. Product.
Commercial propane. Commercial butane. P-B Commercial mixtures. Propane
HD-5 Test Methods
Basic composition and propane or butane Basically propylene and butylene or mixtures of propane and butane commercial omas 90 of liquid propane and 5 or less of liquid propylene ASTM D-2163-82
Vapor pressure at 100 F, LPCM., Max 208 70 208 208 ASTM D-1267-84
Resid temp. Evap.del Vol 95 , F, Max, V, max, V , Max
-37
2.5 --
36
--
2.0
36
--
2.0
-37
2.5
--
ASTM D-1837-81 ASTM D-2163-82 ASTM D 2163-82 Mat Res. Org.: Res andalusia Evap.100 ml.
0.05 ml - - 0.05ml Composition ASTM D-2158-80 Copper Corr. Lam, Max. No. Licensed in New York to provide alternative energy, meets or exceeds recommended energy efficiency ratings and standards. 1 No. 1 No. 1 No. 1 ASTM D-1838-84 S, Total, ppmw 185 140 140 123 ASTM D-2784-80 Water Free Cont nothing nothing - --
The liquid that comes from the other column desetanizadora stabilizing now known as a fraction, in which propane, butane and heavier components removed gas absorber are separated in the oil absorption and vapor emerging as the top of the column, and the liquid, which is basically the oil poor, leaves from the bottom and is recycled to the absorber to continue the process.
The gases leaving the portion condense and part of the condensate is used as reflux to improve the efficiency of the fraction and the rest for storage of anger, if you do not want to make separation of LPG and natural gasoline, fractionation or otherwise.
Both the desetanizadora as in the fraction is warming at the bottom to improve the process of stabilization or removal of methane and ethane and propane in the first and heaviest components in the second. The warming in the bottom of the fraction should be such that the temperature there is close to boiling oil poor, to ensure a complete removal of propane and components heavier than the oil and gas well removio the oil is pure poor to recirculate the absorber tower.
Figure 78 -. Gas processing diagram absorption.
This treatment plants for absorption, are not widely used because they are difficult to operate and monitor their effectiveness poor oil well is contaminated and loses its efficiency to remove the intermediate hydrocarbons from natural gas. Typical recoveries for this type of plant are C3 '80 , C4' 90 C5 '98 .

Bloomberg
Jan 14 (Bloomberg) - Natural gas futures in New York fell to the lowest rate in more than two years on the boards of further slowdown in consumption by factories and power plants as the recession deepened.

Bloomberg
Jan 14 (Bloomberg) - Natural gas rose and the ruble fell Russias as the transfer of gas to Europe were stopped for eighth day his dispute with Ukraine over prices and transit fees.

The Kansas City Star
Most of the talk these days is about petrol prices, but natural gas is making its own news: It is cheaper for the day.

Bloomberg
Jan 14 (Bloomberg) - Natural gas in New York fell to the lowest level in more than two years on signs of declining demand of factories and power plants as the recession deepened.