Method and apparatus for producing synthesis gas from biomass

C - Chemistry – Metallurgy – 10 – J

Patent

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Details

C10J 3/50 (2006.01) C10J 3/52 (2006.01) C10J 3/84 (2006.01)

Patent

CA 2696860

The invention relates to a method and apparatus for producing synthesis gas (7) from biomass (2). The method comprises a step for producing raw product gas (3), and a purifying step comprising several processing steps performed in gas processing means (10, 12, 13, 14) for converting the raw product gas (3) to synthesis gas (7). One processing step is a carbon dioxide removal step for separating carbon dioxide from the stream of raw product gas (3) in a gas processing means comprising a gas purificator (10). The method comprises a step for feeding a stream of the carbon dioxide (9) from the gas purificator (10) to at least one part of the apparatus, said at least one part of the apparatus being selected from: the biomass supply system (4), the gasifier (6) and at least one of the gas processing means (10, 12, 13, 14).

La présente invention concerne un procédé et un appareil de production d'un gaz de synthèse (7) à partir d'une biomasse (2). Le procédé comprend une étape pour produire un produit brut de gaz (3), et une étape de purification comprenant diverses étapes de traitement effectuées dans des moyens de traitement de gaz (10, 12, 13, 14) pour convertir le produit brut de gaz (3) en gaz de synthèse (7). Une étape de traitement est une étape d'élimination de dioxyde de carbone pour séparer le dioxyde de carbone du courant du produit brut de gaz (3) dans un moyen de traitement de gaz comprenant un purificateur de gaz (10). Le procédé comprend une étape pour charger un courant du dioxyde de carbone (9) à partir du purificateur de gaz (10) dans au moins une partie de l'appareil, ladite ou lesdites parties de l'appareil étant choisies parmi : le système d'alimentation de la biomasse (4), le gazéifieur (6) et au moins un des moyens de traitement de gaz (10, 12, 13, 14).

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