close

˸

free_board_view
제목 PRODUCTION OF BIOMETHANE USING MULTIPLE TYPES OF MEMBRANE
작성자 KCRC 등록일 2019-02-12 조회수 107

 

PRODUCTION OF BIOMETHANE USING MULTIPLE TYPES OF MEMBRANE

문헌번호

US 2019-0030482 A1 (2019.01.31)

출원번호

15/711571 (2017.09.21)

출원인

Air Liquide Advanced Technologies, U.S. LLC

발명자

Yong DING | Michael J. Mitariten

Current IPC

(Main)

B01D-053/22

 

 

우선권번호

-

 

 

요약

The invention relates to a process for recovering methane from digester biogas or landfill gas. More specifically, the invention pertains to a method for producing biomethane that removes impurities from a compressed digester biogas with staged membrane modules of at least two different types, to produce a biomethane having at least 94% CH4, below 3% of CO2, and below 4 ppm of H2S.

대표청구항

1. A method for producing biomethane, comprising: compressing a biogas feed in a compressor to produce a compressed feed stream;passing said compressed feed stream to a first separation stage comprising at least one polymeric gas separation membrane to retain a first gas mixture comprising at least 60% of methane, and to permeate a first low-quality gas mixture comprising impurities present in said biogas feed stream and less than 20% of methane;sending a stream of said first gas mixture into a second separation stage comprising at least one polymeric gas separation membrane, to retain a second gas mixture containing at least 94% of methane, and to permeate a second permeate gas mixture comprising impurities present in said biogas feed stream and less than 70% of methane;recycling a stream of said second permeate gas mixture to said compressor; andwithdrawing said second gas mixture from said second separation stage as biomethane, wherein said membrane of said first separation stage is substantially different from said membrane of said second separation stage, and said method excludes the use of regenerable adsorbent.

WIPS 패밀리

US2019-0030482A1

 

이전글/다음글
첨부파일 us20190030482a1p.pdf
이전글 METHODS FOR PREPARING CARBON MOLECULAR SIEVE HOLLOW FIBER MEMBRANES FOR GAS SEPARATION
다음글 SYSTEM AND METHOD FOR CAPTURING CARBON DIOXIDE