| 主权项 |
1. A method of removing H2S from a feed gas, comprising the steps of:
feeding the feed gas comprising at least 2 vol % H2S to a feed gas inlet of a gas separation membrane apparatus that includes a composite fluid separation membrane, a permeate gas outlet, and a non-permeate gas outlet, the membrane comprising a separation layer supported by a porous support layer, the porous support layer comprising a polymeric material, the separation layer comprising a first polymide optionally blended with a second polymide, the first polymide being represented by formula (I):the second polyimide being represented by formula (II):where R1 is a molecular segment selected from the group consisting of the molecular segments of formula (A), formula (B), formula (C), and combinations thereof: withdrawing a permeate gas comprising H2S from a permeate outlet of the membrane; and withdrawing a non-permeate gas from a non-permeate outlet of the membrane, wherein the non-permeate gas has a H2S concentration lower than that of the feed gas. |
