Process and plant for producing a synthesis gas product stream having an adjustable H2/CO ratio and a pure hydrogen stream

US11667526B2 · kind B2 · utility

Assignee

• L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Georges Claude · FR

Inventor

• Joerg Ott · Frankfurt am Main, DE

Key dates

• Filing date: Dec 10, 2020
• Grant date: Jun 6, 2023
• Expiry date: Apr 1, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B2203/168
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Proposed are a process and a plant for producing a synthesis gas product stream having an adjustable H2/CO ratio and a pure hydrogen stream, wherein it is provided according to the invention that a substream of a deacidified synthesis gas stream is supplied to a membrane separation plant fitted with a hydrogen-selective membrane and the remaining substream is supplied to a pressure swing adsorption plant, wherein the latter affords a pure hydrogen stream and a fuel gas stream. The hydrogen-enriched permeate stream obtained from the membrane separation is likewise supplied to the pressure swing adsorption plant, thus enhancing the yield of pure hydrogen. The hydrogen-depleted retentate stream obtained from the membrane separation is discharged as a synthesis gas product stream and if of a suitable composition may be utilized as oxo gas.