| 摘要 |
<p>PURPOSE: A system for recovering absorbate such as carbon dioxide from an oxygen containing mixture wherein carbon dioxide is concentrated in an alkanolamine containing absorption fluid, oxygen is separated from the absorption fluid, and carbon dioxide is steam stripped from the absorption fluid and recovered. CONSTITUTION: The method for recovering carbon dioxide comprises the steps of (i) passing a feed mixture comprising oxygen and carbon dioxide in countercurrent mass transfer contact with absorbent comprising at least one alkanolamine, and passing oxygen and carbon dioxide from the feed mixture into the absorbent to obtain carbon dioxide loaded absorbent containing dissolved oxygen; (ii) separating oxygen from the carbon dioxide loaded absorbent to obtain oxygen depleted carbon dioxide loaded absorbent; (iii) heating the oxygen depleted carbon dioxide loaded absorbent to obtain heated carbon dioxide loaded absorbent; (iv) separating carbon dioxide from the absorbent to obtain a carbon dioxide rich fluid; and (v) recovering carbon dioxide rich fluid.</p> |
