Sour gas membrane treatment process including dehydration

Details Sour gas membrane treatment process including dehydration Sour gas membrane treatment process including dehydration

B - Operations, Transporting

01

D

B01D 53/22 (2006.01) B01D 53/26 (2006.01)

Patent

CA 2174346

Improved membranes and improved membrane processes for treating gas streams containing hydrogen sulfide and methane, plus water vapor, carbon dioxide or both. The processes rely on th availability of two membranes of two membranes types, one of which has a high hydrogen sulfide/methane selectivity and a high water vapour/methane selectivity, when measured with multicomponent gas mixtures at high pressures. Based on the different permeation properties of the two membrane types, optimized separation processes can be designed. In favorable cases, the processes can simultaneously dehydrate the gas stream and remove the hydrogen sulfide to very low levels.

Membranes et processus d'utilisation associés améliorés pour le traitement de courants gazeux contenant de l'acide sulfhydrique et du méthane plus de la vapeur d'eau et/ou du CO¿2?. Le procédé recourt à deux types de membranes dont l'une présente un grand pouvoir de sélection vis à vis de l'acide sulfhydrique et du méthane et vis à vis de la vapeur d'eau et du méthane, lorsque les mesures se font à haute température dans des mélanges de gaz à plusieurs composants. On peut donc concevoir des processus optimisés reposant sur les différences de perméation des deux types de membranes. Dans les cas favorables, le processus peut permettre simultanément de déshydrater le courant gazeux et de ramener l'acide sulfhydrique à des niveaux très bas.

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