Method for recovering a natural gas contaminated with high...

C - Chemistry – Metallurgy – 07 – C

Patent

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C07C 7/11 (2006.01) C07C 29/48 (2006.01) C07C 31/04 (2006.01) C10G 5/00 (2006.01)

Patent

CA 2748949

The present invention provides a method for recovering a natural gas contaminated with high levels of carbon dioxide. A gas containing methane and carbon dioxide is extracted from a reservoir containing natural gas, where carbon dioxide comprises greater than 40 vol.% of the extracted gas. The extracted gas is scrubbed with a wash effective to produce a washed extracted gas containing less carbon dioxide than the extracted gas and at least 20 vol.% carbon dioxide. The washed extracted gas is oxidized with an oxygen containing gas in the presence of a partial oxidation catalyst to produce an oxidation product gas containing hydrogen, carbon monoxide, and carbon dioxide. The oxidation product gas is then utilized to produce a liquid methanol product.

La présente invention porte sur un procédé de récupération d'un gaz naturel contaminé par des taux élevés de dioxyde de carbone. Un gaz contenant du méthane et du dioxyde de carbone est extrait d'un réservoir contenant du gaz naturel, où du dioxyde de carbone comprend plus de 40 % en volume du gaz extrait. Le gaz extrait est lavé avec une solution de lavage efficace pour produire un gaz extrait lavé contenant moins de dioxyde de carbone que le gaz extrait et au moins 20 % en volume de dioxyde de carbone. Le gaz extrait lavé est oxydé par un gaz contenant de l'oxygène en présence d'un catalyseur d'oxydation partielle pour produire un produit d'oxydation gazeux contenant de l'hydrogène, du monoxyde de carbone et du dioxyde de carbone. Le produit d'oxydation gazeux est ensuite utilisé pour produire un produit de méthanol liquide.

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