Sorbents for the oxidation and removal of mercury

B - Operations – Transporting – 01 – D

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B01D 53/02 (2006.01)

Patent

CA 2584327

A promoted activated carbon sorbent is described that is highly effective for the removal of mercury from flue gas streams. The sorbent comprises a new modified carbon form containing reactive forms of halogen and halides. Optional components may be added to increase reactivity and mercury capacity. These may be added directly with the sorbent, or to the flue gas to enhance sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The sorbent can be regenerated and reused. Sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and control of the active sorbent into the mercury contaminated gas stream are described.

L'invention concerne un sorbant de charbon actif hautement efficace pour supprimer le mercure de flux de gaz de combustion. Ce sorbant comprend une nouvelle forme de charbon modifiée contenant des formes réactives d'halogène et d'halogénures. Des composants éventuels de l'invention peuvent être ajoutés pour augmenter la réactivité et la capacité de mercure. Ces composants peuvent être ajoutés directement au sorbant, ou au gaz de combustion, pour améliorer la performance du sorbant et/ou de la capture de mercure. Les efficacités de suppression de mercure obtenues grâce à l'invention dépassent l'efficacité des méthodes de suppression classiques. Le sorbant de l'invention peut être régénéré et réutilisé. Le traitement du sorbant et ses méthodes de préparation sont également décrites. L'invention concerne de nouvelles méthodes pour une préparation, une introduction et un contrôle du sorbant actif dans un flux de gaz contaminé par du mercure.

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