Method and system for gas purification with first direct absorption step and second absorption step by means of membrane contactor
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United States of America Patent
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Oct 13, 2015
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Apr 3, 2014
app pub date -
Mar 16, 2012
filing date -
Mar 16, 2011
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Abstract
A method and system for purification of a pressurized gas stream, wherein the method includes in a first absorption step bringing the pressurized gas stream in direct contact with a first absorption solution absorbing at least part of the acidic gases, in the gas stream obtaining a gas liquid mixture; and separating the gas liquid mixture in a partly purified pressurized gas stream and a first rich absorption solution. In a second downstream absorption step bringing the partly purified pressurized gas in contact with a second absorption solution through a membrane contactor, obtaining a second rich absorption solution and a purified pressurized gas stream. The first absorption solution is a partially lean absorption solution.
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