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nature : often referred to absorb. One chemical unit operation. The use of appropriate liquid absorbent for the separation of gas mixtures in the operation. The use of gas mixtures of the components of the absorbent compound solubility or to the different degrees, so that the soluble and insoluble components selective absorber, with the remaining gas separation. For example, water and air to remove ammonia mixture of ammonia; Or appropriate to deal with the oil-product coke gas to recover benzene and toluene vapor. If the absorption is not significantly associated with the chemical reaction, can be used as a simple physical process, usually called simply absorbed or physical absorption. But as lye as flue gas absorption of carbon dioxide, or water (nitrate solution) absorption of nitrogen oxides to nitric acid, the absorption process associated with chemical reactions. Such absorption operation, said the chemical absorption.
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