HYDROGEN SULFIDE-CARBON DIOXIDE MEMBRANE SEPARATION PROCESS USING PERFLUORINATED MEMBRANES

A process for recovering sulfur from a sour gas is provided. The process includes the steps of: providing the sour gas to a membrane separation unit having a carbon dioxide-selective membrane that comprises a perfluoropolymer, wherein the sour gas comprises carbon dioxide and at least 1 mol % hydrogen sulfide; separating the sour gas using the carbon dioxide-selective membrane in the membrane separation stage to obtain hydrogen sulfide-enriched gas and hydrogen sulfide-stripped gas, wherein the hydrogen sulfide-enriched gas has a hydrogen sulfide concentration of at least 20 mol %, and wherein the hydrogen sulfide-stripped gas comprises carbon dioxide; and processing the hydrogen sulfide-enriched gas in a sulfur recovery unit to obtain sulfur. 本申请提供了一种从含硫气体中回收硫的方法。该方法包括以下步骤：将含硫气体供应至膜分离单元，该膜分离单元具有包含全氟聚合物的二氧化碳选择性膜，其中含硫气体包含二氧化碳和至少1摩尔％硫化氢；在膜分离段使用二氧化碳选择性膜分离含硫气体，以得到富含硫化氢气体和去硫化氢气体，其中富硫化氢气体的硫化氢浓度至少为20摩尔％，且去硫化氢气体包含二氧化碳；以及在硫回收单元中处理富硫化氢气体以得到硫。