| 摘要 |
<p>A process for the removal of contaminants from a sorbent comprises the step of applying a carbon dioxide stream in which the carbon dioxide is present in the liquid phase or supercritical phase, to the contaminated sorbent in a sorbent vessel 10, 12 to remove the contaminant from the sorbent and form a contaminant-laden carbon dioxide stream and a decontaminated sorbent. Preferably the contaminant-laden carbon dioxide stream is recovered from the sorbent vessel and fed to a separation vessel 34, 38 in which the pressure is reduced to cause separation of the contaminant from a depressurised gaseous carbon dioxide. A depressurised gaseous carbon dioxide stream 42, 44 and a separate contaminant stream may then be recovered from the separation vessel 36, 40. The recovered depressurised carbon dioxide may be re-pressurised and fed back to the sorbent vessel. Advantageously, the process may be used for the regeneration of contaminated sorbents and recovering glycol for reuse in the gas field.</p> |
