Method and system for gasifying biomass

Details Method and system for gasifying biomass Method and system for gasifying biomass

C - Chemistry, Metallurgy

10

K

C10K 1/18 (2006.01)

Patent

CA 2458365

Method and device for cleaning synthesis gas obtained during gasification of biomass. The synthesis gas is passed through a saturation device and an absorption device, both of which are fed with oil. In this way the synthesis gas is scrubbed with oil and tar is substantially removed therefrom. The tar- containing oil which is released in this process is subjected to a cleaning step, as a result of which oil with a high percentage of tar and oil with a relatively low percentage of tar are formed. The first oil can be returned to the gasification, and the remaining oil can be reused.

Cette invention concerne un procédé et un dispositif de purification d'un gaz de synthèse obtenu lors d'une gazéification de biomasse. Ce gaz de synthèse est envoyé dans un dispositif de saturation et dans un dispositif d'absorption, lesquels dispositifs sont alimentés en pétrole. De cette façon, le gaz de synthèse est épuré au moyen du pétrole et le goudron est sensiblement extrait du gaz. Le pétrole à base de goudron qui est libéré lors de ce procédé est soumis à une étape d'épuration permettant d'obtenir un pétrole à forte teneur en goudron ainsi qu'un pétrole à teneur relativement faible en goudron. Le premier pétrole peut retourner à la gazéification, et le pétrole restant peut être réutilisé.

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